View source for Earth:2021–22 Hunga Tonga–Hunga Haʻapai eruption and tsunami

{{Short description|Volcanic event in the South Pacific Ocean}}
{{Infobox eruption
| name=2022 Hunga Tonga–Hunga Haʻapai eruption and tsunami
| image=Tonga Volcano Eruption 2022-01-15 0320Z to 0610Z Himawari-8 visible.gif
| caption=Satellite animation of the initial ash plume and shockwave on 15 January 2022
| start_date=20 December 2021<ref name="GVP">{{cite gvp|title=Hunga Tonga-Hunga Haʻapai: Eruptive History|vn=243040|vtab=Eruptions|access-date=12 June 2022|url-status=live|archive-date=12 June 2022}}</ref>{{#tag:ref|The volcano was declared dormant on January 11 after the December 2021 eruption sequence ended.<ref name="December eruption" />|group="nb"}}
| end_date=15 January 2022<ref name="GVP"/>
| volcano=[[Earth:Hunga Tonga–Hunga Haʻapai|Hunga Tonga–Hunga Haʻapai]]
| type=[[Earth:Surtseyan eruption|Surtseyan]], [[Earth:Plinian eruption|Plinian]]<ref name="February report">{{cite web|url=https://volcano.si.edu/showreport.cfm?doi=10.5479/si.GVP.BGVN202202-243040|title=Report on Hunga Tonga-Hunga Ha'apai (Tonga) — February 2022|publisher=Smithsonian Institution|work=[[Earth:Global Volcanism Program|Global Volcanism Program]]|year=2022|doi=10.5479/si.GVP.BGVN202202-243040 |doi-broken-date=31 December 2022 |access-date=2022-05-24|archive-date=13 March 2022|archive-url=https://web.archive.org/web/20220313065124/https://volcano.si.edu/showreport.cfm?doi=10.5479%2Fsi.GVP.BGVN202202-243040|url-status=live}}</ref><ref name="EGU">{{cite conference|last1=Walter|first1=Thomas R.|last2=Cesca|first2=Simone|url=https://meetingorganizer.copernicus.org/EGU22/EGU22-13590.html|title=Caldera subsidence during the Hunga-Tonga explosive eruption?|publisher=Copernicus GmbH |conference=EGU General Assembly 2022 |year=2022|doi=10.5194/egusphere-egu22-13590 |access-date=2022-05-24|archive-date=25 May 2022|archive-url=https://web.archive.org/web/20220525030404/https://meetingorganizer.copernicus.org/EGU22/EGU22-13590.html|url-status=live}}</ref>
| location=Pacific Ocean, Tonga
| coordinates={{coord|20.550|S|175.385|W|name=Hunga Tonga}}
| VEI=5–6<ref name="YuenEtAl" />                       
|impact=At least 6 dead, 19 injured, and others reported missing, $90.4 million in damages in Tonga (estimated)
}}
In December 2021, an eruption began on [[Earth:Hunga Tonga–Hunga Haʻapai|Hunga Tonga–Hunga Haʻapai]], a [[Earth:Submarine volcano|submarine volcano]] in the Tongan archipelago in the southern [[Earth:Pacific Ocean|Pacific Ocean]].<ref>{{cite web |title=Tonga's strange volcanic eruption was even more massive than we knew |url=https://www.nationalgeographic.com/science/article/tonga-volcano-largest-eruption-pacific-ocean-tallest-plume |work=National Geographic |author=Maya Wei-Haas
|date=21 November 2022}}</ref> The eruption reached a very large and powerful climax nearly four weeks later, on 15 January 2022.<ref name="Amos">{{Cite news |title=Tonga volcano eruption continues to astonish |last=Amos |first=Jonathan |work=BBC News |date= 13 December 2022|access-date=5 January 2023 |url= https://www.bbc.co.uk/news/science-environment-63953531}}</ref> Hunga Tonga–Hunga Haʻapai is {{cvt|65|km}} north of Tongatapu, the country's main island,<ref name="gvp">{{cite gvp|title=Hunga Tonga-Hunga Haʻapai|vn=243040|access-date=2 February 2022|url-status=live|archive-date=2 February 2022}}</ref> and is part of the highly active Tonga–Kermadec Islands volcanic arc, a subduction zone extending from [[Earth:New Zealand|New Zealand]] to Fiji.<ref>Clift, Peter D.; Rose, Estelle F.; Shimizu, Nobumichi; Layne, Graham D.; Draut, Amy E.; and Regelous, Marcel. "Tracing the Evolving Flux From the Subducting Plate in the Tonga-Kermadec Arc System Using Boron in Volcanic Glass" ''Geochimica et Cosmochimica Acta'' 65:19 (October 2001) {{doi|10.1016/S0016-7037(01)00670-6}}</ref><ref name="Gupta">Gupta, Alok K. ''Igneous Rocks'' Mumbai, India: Allied Publishers, 1998 {{ISBN|81-7023-784-X}}</ref> In the [[Earth:Volcanic Explosivity Index|Volcanic Explosivity Index]] scale, the eruption was rated at least a VEI-5.<ref name="GVP"/><ref name="Poli&Shapiro" /> Described by scientists as a "magma hammer", the volcano at its height produced a series of four underwater thrusts, displaced 10 cubic kilometers of rock, ash and sediment, and generated the largest atmospheric explosion recorded by modern instrumentation.<ref name="Amos"/>

The eruption caused [[Tsunami|tsunami]]s in Tonga, Fiji, American Samoa, Vanuatu, and along the Pacific rim, including damaging tsunamis in New Zealand, {{wipe|Japan}}, the {{wipe|United States}}, the [[Place:Russian Far East|Russian Far East]], {{wipe|Chile}}, and Peru. At least four people were killed, some were injured, and some remain possibly missing in Tonga from tsunami waves up to {{cvt|20|m}} high. Two people drowned in Peru when {{cvt|2|m}} waves struck the coast. It was the largest volcanic eruption since the [[Earth:1991 eruption of Mount Pinatubo|1991 eruption of Mount Pinatubo]], and the most powerful eruption since the [[Earth:1883 eruption of Krakatoa|1883 eruption of Krakatoa]].<ref name="cnn">{{cite web |last=Hunt |first=Katie |date=12 May 2022 |title=Tonga volcano was the most ferocious eruption in 140 years |url=https://edition.cnn.com/2022/05/12/asia/tonga-eruption-biggest-in-more-a-century-scn/index.html |url-status=live |archive-url=https://web.archive.org/web/20220513103501/https://edition.cnn.com/2022/05/12/asia/tonga-eruption-biggest-in-more-a-century-scn/index.html |archive-date=13 May 2022 |access-date=14 May 2022 |website=CNN}}</ref> [[Organization:NASA|NASA]] determined that the eruption was "hundreds of times more powerful" than the atomic bomb dropped on Hiroshima.<ref>{{cite news|date=24 January 2022|title=Tonga volcano: Eruption more powerful than atomic bomb, Nasa says|publisher=BBC News|url=https://www.bbc.com/news/world-asia-60106981|url-status=live|access-date=24 January 2022|archive-url=https://archive.today/20220124162723/https://www.bbc.com/news/world-asia-60106981|archive-date=24 January 2022}}</ref> The eruption was the largest explosion recorded in the atmosphere by modern instrumentation, far larger than any 20th century volcanic event or nuclear bomb test. It is thought that in recent centuries, only the Krakatoa eruption of 1883 rivalled the atmospheric disturbance produced.<ref>{{cite journal | last1=Matoza | first1=Robin S. | last2=Fee | first2=David | last3=Assink | first3=Jelle D. | last4=Iezzi | first4=Alexandra M. | last5=Green | first5=David N. | last6=Kim | first6=Keehoon | last7=Toney | first7=Liam | last8=Lecocq | first8=Thomas | last9=Krishnamoorthy | first9=Siddharth | last10=Lalande | first10=Jean-Marie | last11=Nishida | first11=Kiwamu | last12=Gee | first12=Kent L. | last13=Haney | first13=Matthew M. | last14=Ortiz | first14=Hugo D. | last15=Brissaud | first15=Quentin | last16=Martire | first16=Léo | last17=Rolland | first17=Lucie | last18=Vergados | first18=Panagiotis | last19=Nippress | first19=Alexandra | last20=Park | first20=Junghyun | last21=Shani-Kadmiel | first21=Shahar | last22=Witsil | first22=Alex | last23=Arrowsmith | first23=Stephen | last24=Caudron | first24=Corentin | last25=Watada | first25=Shingo | last26=Perttu | first26=Anna B. | last27=Taisne | first27=Benoit | last28=Mialle | first28=Pierrick | last29=Le Pichon | first29=Alexis | last30=Vergoz | first30=Julien | last31=Hupe | first31=Patrick | last32=Blom | first32=Philip S. | last33=Waxler | first33=Roger | last34=De Angelis | first34=Silvio | last35=Snively | first35=Jonathan B. | last36=Ringler | first36=Adam T. | last37=Anthony | first37=Robert E. | last38=Jolly | first38=Arthur D. | last39=Kilgour | first39=Geoff | last40=Averbuch | first40=Gil | last41=Ripepe | first41=Maurizio | last42=Ichihara | first42=Mie | last43=Arciniega-Ceballos | first43=Alejandra | last44=Astafyeva | first44=Elvira | last45=Ceranna | first45=Lars | last46=Cevuard | first46=Sandrine | last47=Che | first47=Il-Young | last48=De Negri | first48=Rodrigo | last49=Ebeling | first49=Carl W. | last50=Evers | first50=Läslo G. | last51=Franco-Marin | first51=Luis E. | last52=Gabrielson | first52=Thomas B. | last53=Hafner | first53=Katrin | last54=Harrison | first54=R. Giles | last55=Komjathy | first55=Attila | last56=Lacanna | first56=Giorgio | last57=Lyons | first57=John | last58=Macpherson | first58=Kenneth A. | last59=Marchetti | first59=Emanuele | last60=McKee | first60=Kathleen F. | last61=Mellors | first61=Robert J. | last62=Mendo-Pérez | first62=Gerardo | last63=Mikesell | first63=T. Dylan | last64=Munaibari | first64=Edhah | last65=Oyola-Merced | first65=Mayra | last66=Park | first66=Iseul | last67=Pilger | first67=Christoph | last68=Ramos | first68=Cristina | last69=Ruiz | first69=Mario C. | last70=Sabatini | first70=Roberto | last71=Schwaiger | first71=Hans F. | last72=Tailpied | first72=Dorianne | last73=Talmadge | first73=Carrick | last74=Vidot | first74=Jérôme | last75=Webster | first75=Jeremy | last76=Wilson | first76=David C. | title=Atmospheric waves and global seismoacoustic observations of the January 2022 Hunga eruption, Tonga | journal=Science | publisher=American Association for the Advancement of Science (AAAS) | date=12 May 2022 | volume=377 | issue=6601 | pages=95–100 | issn=0036-8075 | doi=10.1126/science.abo7063 |pmid=35549311 | bibcode=2022Sci...377...95M |doi-access=free }}</ref><ref>{{Cite news |title=Tonga eruption was 'record atmospheric explosion' |last=Amos |first=Jonathan |work=BBC News |date=15 May 2022 |url=https://www.bbc.co.uk/news/science-environment-61452860 |access-date=15 May 2022 |archive-date=15 May 2022 |archive-url=https://web.archive.org/web/20220515165611/https://www.bbc.com/news/science-environment-61452860 |url-status=live }}</ref>

== Volcanic activity ==
===December 2021===
[[File:Hunga Tonga–Hunga Ha'apai volcanic eruption captured at December 30, 2021.webm|thumb|270x270px|Footage of the Hunga Tonga–Hunga Haʻapai eruption on 30 December 2021]]
After staying relatively inactive since 2014,<ref>{{cite news|last=Khan|first=Aina J.|date=15 January 2022|title=Tsunami Reported in Tonga After an Underwater Volcano Eruption|newspaper=The New York Times|url=https://www.nytimes.com/2022/01/15/world/asia/tonga-volcano-tsunami.html|url-access=limited|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115144943/https://www.nytimes.com/2022/01/15/world/asia/tonga-volcano-tsunami.html|archive-date=15 January 2022}}</ref> the Hunga Tonga–Hunga Haʻapai volcano erupted on 20 December 2021, sending particulates into the [[Earth:Stratosphere|stratosphere]]. A large [[Earth:Eruption column|plume of ash]] was visible from [[Place:Nukuʻalofa|Nukuʻalofa]], the capital city of Tonga, about {{cvt|70|km}} from the volcano.<ref name="GVP" /><ref name="MT2021a" /> The [[Earth:Volcanic Ash Advisory Center|Volcanic Ash Advisory Center]] (VAAC) in [[Place:Wellington|Wellington]], New Zealand, issued an advisory notice to airlines.<ref>{{cite web|date=19 December 2021|title=VA ADVISORY DTG: 20211219/2209Z VAAC: WELLINGTON VOLCANO: HUNGA TONGA-HUNGA HA'APAI 243040|url=http://vaac.metservice.com/dynamic/vaa/243040_2021_2.txt |archive-url=https://web.archive.org/web/20211220022535/http://vaac.metservice.com/dynamic/vaa/243040_2021_2.txt|archive-date=20 December 2021|access-date=20 December 2021|website=VAAC}}</ref> This initial eruption ended at 02:00 on 21 December 2021.<ref name="MT2021a">{{cite web|author=Mary Lyn Fonua|date=21 December 2021|title=Air NZ funeral flight to Tonga cancelled as Hunga eruption continues|url=https://matangitonga.to/2021/12/21/funeral-flight-tonga-cancelled-hunga-eruption|url-access=subscription|url-status=live|archive-url=https://web.archive.org/web/20211221062554/https://matangitonga.to/2021/12/21/funeral-flight-tonga-cancelled-hunga-eruption|archive-date=21 December 2021|access-date=21 December 2021|publisher=Matangi Tonga}}</ref>

On 22 December and 23 December 2021, {{convert|8|to|14|km|mi|adj=mid|-high}} plumes containing [[Chemistry:Sulfur dioxide|sulfur dioxide]] drifted to the north-northeast and spread over the [[Earth:Niuatoputapu|Niuatoputapu]], Haʻapai and Vavaʻu island groups. [[Earth:Surtseyan eruption|Surtseyan explosions]], steam plumes and steam bursts were recorded by a Tonga Navy crew on 23 December 2021, during which time the first ground-based images of the eruption were created.<ref name="February report"/>

Between 24 December and 27 December 2021, steam and gas emissions reached altitudes of {{convert|10.3|–|12.2|km|mi}}. Ash plumes reached heights of only {{convert|3|km|mi}}, depositing ash only adjacent to the volcano.<ref name="February report"/> On 25 December 2021, [[Astronomy:Satellite imagery|satellite imagery]] revealed that the island had increased in size by {{convert|300–600|m|ft}} on its eastern side.<ref name="February report"/><ref>{{cite web|url=https://www.rnz.co.nz/news/national/458609/tonga-volcano-grows-in-size-as-eruption-continues-for-sixth-day|title=Tonga volcano grows in size as eruption continues for sixth day|publisher=RNZ|date=25 December 2021|access-date=26 December 2021|archive-date=25 December 2021|archive-url=https://web.archive.org/web/20211225214410/https://www.rnz.co.nz/news/national/458609/tonga-volcano-grows-in-size-as-eruption-continues-for-sixth-day|url-status=live}}</ref> During 29–30 December 2021, several surges of Surtseyan activity occurred, some of which were witnessed by passengers on a small South Seas Charters boat. Eruption plumes during the second half of December 2021 interrupted air travel to Tonga multiple times.<ref name="February report"/>

===January 2022===
As activity on the island decreased, it was declared dormant by the Tonga Geological Services on 11 January 2022.<ref name="December eruption">{{cite web|author=Tonga Geological Services, Government of Tonga|date=11 January 2022|title=7 Days with no further eruption from Hunga Volcano. It is now declared dormant.|url=https://www.facebook.com/tongageologicalservice/posts/232425525715182|url-status=live|access-date=17 January 2022|via=Facebook|archive-date=17 January 2022|archive-url=https://archive.today/20220117131239/https://www.facebook.com/tongageologicalservice/posts/232425525715182}}</ref><ref name="1News1" /> A large eruption commenced on 14 January 2022 at 04:20 local time (15:20 UTC, 13 January), sending clouds of ash {{cvt|20|km}} into the atmosphere.<ref name="RNZ 1">{{cite news|title=Underwater volcano Hunga-Tonga-Hunga-Haʻapai erupts again |url=https://www.rnz.co.nz/international/pacific-news/459572/underwater-volcano-hunga-tonga-hunga-ha-apai-erupts-again|access-date=15 January 2022|publisher=Radio New Zealand|date=14 January 2022|archive-date=14 January 2022|archive-url=https://web.archive.org/web/20220114115608/https://www.rnz.co.nz/international/pacific-news/459572/underwater-volcano-hunga-tonga-hunga-ha-apai-erupts-again|url-status=live}}</ref><ref>{{cite journal|editor-last=Sennert|editor-first=Sally Kuhn|date=12-18 January 2022|title=Global Volcanism Program 2022. Report on Hunga Tonga-Hunga Ha'apai (Tonga)|url=https://volcano.si.edu/ShowReport.cfm?doi=10.5479/si.GVP.WVAR20220112-243040|url-status=live|archive-url=https://archive.today/20220120125920/https://volcano.si.edu/showreport.cfm?doi=GVP.WVAR20220112-243040|archive-date=20 January 2022|journal=Weekly Volcanic Activity Report|publisher=Smithsonian Institution and US Geological Survey|doi=10.5479/si.GVP.WVAR20220112-243040 |doi-broken-date=31 December 2022 |access-date=15 May 2022}}</ref> The government of Tonga issued a tsunami warning to residents, and waves of {{cvt|30|cm}} were observed in Nuku'alofa.<ref name="RNZ 1" /><ref>{{cite web |url=https://www.gov.to/press-release/tsunami-marine-warning-for-tonga/ |title=Tsunami Marine Warning for Tonga |publisher=Government of Tonga |date=14 January 2022 |access-date=14 January 2022 |archive-url=https://web.archive.org/web/20220113230846/https://www.gov.to/press-release/tsunami-marine-warning-for-tonga/ |archive-date=14 January 2022}}</ref> Later in the afternoon, Tongan geologists near the volcano observed explosions and a {{cvt|5|km}}-wide ash column between 17:00 and 18:30 local time.<ref>{{cite web|last=Mary Lyn Fonua|date=15 January 2022|title=Tongan geologists observe stunning eruptions at Hunga|url=https://matangitonga.to/2022/01/15/tongan-geologists-stunning-Jan14eruptions|url-access=subscription|url-status=live|archive-url=https://archive.today/20220116003811/https://matangitonga.to/2022/01/15/tongan-geologists-stunning-Jan14eruptions|archive-date=16 January 2022|access-date=15 January 2022|publisher=Matangi Tonga}}</ref> A much larger [[Earth:Plinian eruption|Plinian eruption]] started the following day (15 January 2022) at 17:14 local time (04:14:45 [[Physics:Coordinated Universal Time|UTC]], 15 January).<ref name="EGU"/><ref name="ANSS5.8">{{cite web|date=15 January 2022|title=M 5.8 Volcanic Eruption – 68 km NNW of Nuku'alofa, Tonga|url=https://earthquake.usgs.gov/earthquakes/eventpage/pt22015050/executive|url-status=live|archive-url=https://archive.today/20220117103554/https://earthquake.usgs.gov/earthquakes/eventpage/pt22015050/executive|archive-date=17 January 2022|access-date=15 January 2022|publisher=USGS}} {{PD-notice}}</ref> The eruption column from this eruption rose {{cvt|58|km}} into the [[Earth:Mesosphere|mesosphere]].<ref name="simon2022">{{cite tweet|number=1484123252293353475|user=simon_sat|title=We've been looking into the Tonga eruption in more detail. Our latest data says that the main volcanic 'umbrella' reached 35 km altitude - but some points (such as the image below) may have reached 55 km altitude! Shocking altitudes that show just how violent this eruption was.|author=Simon Proud|date=20 January 2022|access-date=21 January 2022|archive-url=https://archive.vn/DRRxV|archive-date=24 March 2022|url=https://twitter.com/simon_sat/status/1484123252293353475?s=21|website=twitter.com}}</ref><ref>{{Cite web|date=2022-02-16|title=Tonga Volcano Plume Reached the Mesosphere|url=https://earthobservatory.nasa.gov/images/149474/tonga-volcano-plume-reached-the-mesosphere|archive-url=https://ghostarchive.org/archive/20220221010258/https://earthobservatory.nasa.gov/images/149474/tonga-volcano-plume-reached-the-mesosphere|archive-date=21 February 2022|access-date=2022-02-19|website=earthobservatory.nasa.gov|publisher=NASA Earth Observatory|language=en|url-status=live}}</ref> The VAAC again issued an advisory notice to airlines.<ref>{{cite web|date=15 January 2022|title=Hunga Tonga-Hunga Ha'apai Volcano Volcanic Ash Advisory: NEW ERUPTION SEEN IN SATELLITE IMAGERY OBS VA DTG: 15/0439Z to 52000 ft (15800 m)|url=https://www.volcanodiscovery.com/hunga-tonga-hunga-haapai/news/170507/Hunga-Tonga-Hunga-Ha-apai-Volcano-Volcanic-Ash-Advisory-NEW-ERUPTION-SEEN-IN-SATELLITE-IMAGERY-OBS-V.html|url-status=live|archive-url=https://ghostarchive.org/archive/20220121050138/https://www.volcanodiscovery.com/hunga-tonga-hunga-haapai/news/170507/Hunga-Tonga-Hunga-Ha-apai-Volcano-Volcanic-Ash-Advisory-NEW-ERUPTION-SEEN-IN-SATELLITE-IMAGERY-OBS-V.html|archive-date=21 January 2022|access-date=15 January 2022|website=Volcano discovery|publisher=VAAC Wellington}}</ref> Ash from the eruption made landfall on the main island of Tongatapu, blotting out the [[Astronomy:Sun|sun]]. Loud explosions were heard {{cvt|65|km}} away in Nukuʻalofa, and small stones and ash rained down from the sky.<ref>{{cite web|last=Kaniva Staff|date=15 January 2022|title=New tsunami warning as waves hitting Tonga|url=https://www.kanivatonga.nz/2022/01/new-tsunami-warning-as-waves-hitting-tonga/|url-status=live|archive-url=https://web.archive.org/web/20220115155128/https://www.kanivatonga.nz/2022/01/new-tsunami-warning-as-waves-hitting-tonga/|archive-date=15 January 2022|access-date=15 January 2022|publisher=Kaniva Tonga}}</ref> Many residents in Tonga were stuck in traffic whilst attempting to flee to higher ground.<ref name="Cheer">{{cite news|author1=Cheer|first=Louise|last2=Palu|first2=Kamilia|date=15 January 2022|title=Tsunami hits Tonga after 'catastrophic' volcano eruption|publisher=Yahoo News Australia|url=https://au.news.yahoo.com/tsunami-hits-tonga-after-catastrophic-volcano-eruption-060809732.html|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155159/https://au.news.yahoo.com/tsunami-hits-tonga-after-catastrophic-volcano-eruption-060809732.html|archive-date=15 January 2022}}</ref>

{{multiple image
| width             = 220
| align             = left
| direction         = vertical
| image1            = Hunga Tonga eruption 2022-01-15 4000Z-0850Z GOES-17.gif
| caption1          = A four-hour observation of the January 2022 eruption over the southern Pacific Ocean from the [[Engineering:GOES-17|GOES-West]] satellite<!-- "GeoColor is a multispectral product composed of True Color (using a simulated green component) during daytime, and an Infrared product that uses bands 7 and 13 at night". -->
| image2            = Shockwave from Hunga Tonga GOES 17.gif
| caption2          = Shockwave from the Hunga Tonga eruption captured by [[Engineering:GOES-17|GOES-17]] (GOES-West) and shown using the Mid-level Water Vapor
}}
The explosion was heard in Samoa, roughly {{cvt|840|km}} away before the sound travelled to more distant countries.<ref>{{cite web|last=Narayan|first=Vijay|title=Loud thundery sounds being experienced in Fiji are from the huge volcanic eruption in Tonga|url=https://www.fijivillage.com/news/Loud-thundery-sounds-being-experienced-in-Fiji-are-from-the-huge-volcanic-eruption-in-Tonga--5r4xf8/|url-status=live |access-date=15 January 2022|publisher=Fiji Village|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115065202/https://www.fijivillage.com/news/Loud-thundery-sounds-being-experienced-in-Fiji-are-from-the-huge-volcanic-eruption-in-Tonga--5r4xf8/}}</ref><ref>{{cite news|url=https://www.stuff.co.nz/world/south-pacific/300496665/screams-everywhere-tsunami-waves-crash-through-homes-in-tonga-after-eruption|title='Screams everywhere': Tsunami waves crash through homes in Tonga after eruption|first1=Hannah|last1=Martin|first2=Skara|last2=Bohny|first3=Stephanie|last3=Ockhuysen |first4=Torika|last4=Tokalau|publisher=Stuff|date=15 January 2022|access-date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155105/https://www.stuff.co.nz/world/south-pacific/300496665/tsunami-waves-crash-through-homes-in-tonga-after-underwater-volcano-eruption|url-status=live}}</ref> Residents in Fiji, more than {{cvt|700|km}} away, described the sounds of thunder, while the "thump" of the eruption was also reported in Niue and Vanuatu.<ref name="rnz4">{{cite news|title=Cyclone Cody: Latest developments from New Zealand and the Pacific after Tonga tsunami and eruption|url=https://www.rnz.co.nz/news/national/459631/cyclone-cody-latest-developments-from-new-zealand-and-the-pacific-after-tonga-tsunami-and-eruption|publisher=Radio New Zealand|date=16 January 2022|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116131325/https://www.rnz.co.nz/news/national/459631/cyclone-cody-latest-developments-from-new-zealand-and-the-pacific-after-tonga-tsunami-and-eruption|archive-date=16 January 2022|url-status=live}}</ref> Tremors and shaking buildings were reported by residents in southwestern Niue, around [[Place:Alofi|Alofi]] and Avatele.<ref name=tvniue>{{cite news|first=Esther|last=Pavihi|title=Yesterday's Hunga-Tonga volcano eruption was heard and felt in Niue but no tsunami impact |url=https://tvniue.com/2022/01/yesterdays-hunga-tonga-volcano-eruption-was-heard-and-felt-in-niue-but-no-tsunami-impact/|publisher=Television Niue|date=16 January 2022|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116132633/https://tvniue.com/2022/01/yesterdays-hunga-tonga-volcano-eruption-was-heard-and-felt-in-niue-but-no-tsunami-impact/|archive-date=16 January 2022|url-status=live}}</ref> The United States Geological Survey (USGS) estimated the eruption at a [[Earth:Surface-wave magnitude|surface-wave magnitude]] of 5.8.<ref name="ANSS5.8" />{{#tag:ref|This is an explosion which magnitude was [[Earth:Seismic magnitude scales|calculated]] using techniques calibrated for earthquakes.<ref name="ANSS5.8" />|group="nb"}} The eruption was heard more than {{cvt|2000|km}} away in New Zealand, where the sound arrived two hours later.<ref>{{cite web|last=Gates|first=Charlie|date=16 January 2022|title='Rapid bang': Kiwis hear Tongan volcano erupt from thousands of kilometres away|url=https://www.stuff.co.nz/national/127515677/rapid-bang-kiwis-hear-tongan-volcano-erupt-from-thousands-of-kilometres-away|url-status=live|archive-url=https://web.archive.org/web/20220116105715/https://www.stuff.co.nz/national/127515677/rapid-bang-kiwis-hear-tongan-volcano-erupt-from-thousands-of-kilometres-away|archive-date=16 January 2022|access-date=16 January 2022|website=stuff.co.nz}}</ref> A series of bangs were heard around 3:30&nbsp;a.m. local time in and around Anchorage, Alaska, approximately {{cvt|9300|km|mi}} away from the volcano, lasting about 30 minutes. Low-frequency noise persisted for approximately two hours.<ref>{{cite news|first=Annie|last=Berman|newspaper=Anchorage Daily News|date=16 January 2022|access-date=17 January 2022|title=Volcano eruption near Tonga causes booms heard by Alaskans nearly 6000 miles away|url=https://www.adn.com/alaska-news/science/2022/01/15/volcano-eruption-near-tonga-causes-booms-heard-by-alaskans-nearly-6000-miles-away/|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116084124/https://www.adn.com/alaska-news/science/2022/01/15/volcano-eruption-near-tonga-causes-booms-heard-by-alaskans-nearly-6000-miles-away/|url-status=live}}</ref> Booms were heard as far away as [[Earth:Yukon|Yukon]] in Canada, 9,700 km (6,000 mi) away.<ref name="Smith">{{cite news|author1=Oli Smith|date=15 January 2022|title=Tonga tsunami: Satellite footage shows moment of volcanic shockwave – apocalyptic scenes|publisher=Daily Express|url=https://www.express.co.uk/news/world/1550449/Tonga-tsunami-volcano-eruption-video-satellite-footage-American-Samoa-evacuation-vn|url-status=live|access-date=22 January 2022|archive-url=https://archive.today/20220122113133/https://www.express.co.uk/news/world/1550449/Tonga-tsunami-volcano-eruption-video-satellite-footage-American-Samoa-evacuation-vn|archive-date=22 January 2022}}</ref><ref>{{cite web|url=https://www.cbc.ca/news/canada/north/noise-from-underwater-volcanic-eruption-across-the-pacific-heard-in-the-yukon-1.6316510|title=Noise from underwater volcanic eruption across the Pacific heard in the Yukon|date=15 January 2022|publisher=Canadian Broadcasting Corporation |website=cbc.ca|last=Carroll|first=Luke|access-date=16 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115190844/https://www.cbc.ca/news/canada/north/noise-from-underwater-volcanic-eruption-across-the-pacific-heard-in-the-yukon-1.6316510|url-status=live}}</ref>

[[File:Hunga Tonga–Hunga Ha'apai volcanic eruption January 14, 2022.webm|thumb|270x270px|Footage from an aircraft viewing the eruption on 14 January 2022]]

{{nowrap|The volcanic}} explosion caused atmospheric [[Physics:Shock wave|shockwaves]] to propagate around the globe. Satellites visually captured shockwaves propagating across the Pacific Ocean and a very wide [[Earth:Eruption column|eruption column]].<ref name="Smith" /> The pressure wave was measured by weather stations in many locations, including New Zealand to a maximum amplitude of about 7 [[Pascal (unit)|hPa]],<ref>{{cite web|date=15 January 2022|title=A pressure surge from the latest eruption of the Hunga-Tonga-Hunga-Ha'apai volcano in Tonga has been observed in our weather stations across the country this evening. Note, times are in UTC, so 06:00 UTC is 19:00 NZ Time.|url=https://twitter.com/metservice/status/1482247777891799042|url-status=live|access-date=15 January 2022|website=twitter.com|archive-date=16 January 2022|archive-url=https://archive.today/20220116083050/https://twitter.com/metservice/status/1482247777891799042}}</ref> and Australia to 6.9 hPa at [[Earth:Lord Howe Island|Lord Howe Island]] and 3.3 hPa at Perth.<ref>{{cite tweet|number=1482592498992427009|user=BOM_au|title=Bureau data shows the shockwave from Hunga Tonga-Hunga Ha'apai volcanic eruption travelled at over 1000 km/h and was recorded as a noticeable jump in atmospheric pressure across Australia. By the time it reached Perth it had travelled almost 7000 kilometres.|author=Bureau of Meteorology, Australia|date=16 January 2022|archive-date=17 January 2021|archive-url=http://archive.today/20220117050228/https://twitter.com/BOM_au/status/1482592498992427009|url-status=live}}</ref><ref>{{cite web|last1=Noyes|first1=Jenny|last2=Han|first2=Esther|date=15 January 2022|title=Waves crash into Tonga homes as tsunami warnings sound across the Pacific|url=https://www.smh.com.au/world/oceania/footage-shows-waves-crashing-into-homes-as-tsunami-warning-sounds-in-tonga-20220115-p59ohh.html|archive-url=https://web.archive.org/web/20220115155103/https://www.smh.com.au/world/oceania/footage-shows-waves-crashing-into-homes-as-tsunami-warning-sounds-in-tonga-20220115-p59ohh.html|archive-date=15 January 2022|access-date=15 January 2022|newspaper=The Sydney Morning Herald}}</ref><ref>{{cite tweet |link=no|number=1482282515616645123|user=Ben_Domensino|title=This is phenomenal. It appears the atmospheric pressure waves created by the #Tonga #volcano have been detected on Australia's east coast. This graph shows MSLP fluctuating in Sydney around the same time satellite images showed the pressure wave reaching eastern Australia.|archive-date=16 January 2022|archive-url=https://archive.today/gJxET}}</ref><ref>{{cite tweet|number=1482312272479686659|user=Ben_Domensino|title=The pressure wave was also detected in #Perth, WA around 6:30 pm AWST, some 6900 km away from the Hunga Tonga-Hunga Haʻapai volcano.|date=15 January 2022|archive-url=https://archive.vn/3R7Pc|archive-date=17 January 2022|link=no}}</ref>   Even in Europe, a pressure fluctuation of 2.5 hPa was measured in Switzerland,<ref>{{cite tweet|link=no|author=Jörg Kachelmann|user=Kachelmann|date=15 January 2022|access-date=15 January 2022 |title=Unglaublich: Die Druckwelle aus #Tonga ist gerade in der Schweiz angekommen, 2,5 hPa Ausschlag|number=1482441437216133127|archive-url=https://archive.today/ryeI7|archive-date=17 January 2022|trans-title=Unbelievable: The pressure wave from #Tonga has just arrived in Switzerland, 2.5 hPa rash|language=de, en}}</ref> and of just over 2 hPa when it reached the United Kingdom.<ref>{{cite tweet|number=1482605906659622914|user=metoffice|title=Our atmosphere acts as a fluid, like dropping a pebble in a still pond and seeing the ripples. A UK pressure trace for the past 24 hours shows how our atmosphere continues to see those ripples since the first pressure wave from the #Tonga eruption arrived on Saturday evening.|author=UK Met Office|date=16 January 2022|access-date=16 January 2022|archive-url=https://archive.vn/aITex|archive-date=26 March 2022|link=no}}</ref> Shockwaves were reported as having gone around the earth as many as four times in Japan and Utah,<ref>{{cite web|title=トンガ火山噴火による衝撃波が地球1周して再来か 今朝も各地で気圧変化|trans-title=Is the shock wave from the eruption of Tonga going around the earth and coming back? |url=https://weathernews.jp/s/topics/202201/170085/|url-status=live|archive-url=https://web.archive.org/web/20220117143238/https://weathernews.jp/s/topics/202201/170085/|archive-date=17 January 2022|access-date=18 January 2022|website=ウェザーニュース|language=ja}}</ref><ref>{{cite tweet|link=no|number=1483203330646024201|user=cataclasite|title=Sure looks like we got a fourth passage of the Hunga Tonga – Hunga Ha'apai eruption shockwave in Utah. Timing is spot-on and signal is similar to previous passages. Interesting for sure but worried for the people of Tonga.|author=Michael Bunds|archive-url=https://archive.today/rhT3W|archive-date=19 January 2022}}</ref> and at least twice at the [[Earth:Blue Hill Meteorological Observatory|Blue Hill Meteorological Observatory]] in {{wipe|Massachusetts}}.<ref>{{cite web|last=Burnett|first=A. J.|date=16 January 2022|title=Weather instruments around southern New England detect Hunga Tonga shockwave|url=https://www.wcvb.com/article/weather-instruments-around-southern-new-england-detect-hunga-tonga-shockwave/38784108 |access-date=18 January 2022|publisher=WCVB|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116222313/https://www.wcvb.com/article/weather-instruments-around-southern-new-england-detect-hunga-tonga-shockwave/38784108|url-status=live}}</ref> The pressure shockwave was also observed in Chennai, India, which is 12,000&nbsp;km from the eruption site.<ref>{{cite news|last=Staff Reporter|date=17 January 2022|title=Shockwave from Tonga volcanic eruption recorded in Chennai|newspaper=The Hindu|url=https://www.thehindu.com/news/cities/chennai/shockwave-from-tonga-volcanic-eruption-recorded-in-chennai/article38281020.ece|url-status=live|access-date=23 January 2022|archive-url=https://archive.today/20220117150557/https://www.thehindu.com/news/cities/chennai/shockwave-from-tonga-volcanic-eruption-recorded-in-chennai/article38281020.ece|archive-date=17 January 2022}}</ref>

Intense [[Physics:Volcanic lightning|lightning]] activity was recorded during the eruption phase. The Vaisala Global Lightning Dataset GLD360 detected lightning in the form of radio waves. Several hundred to a thousand flashes of lightning were recorded by the system during the two weeks before the eruption. From 14 to 15 January 2022, tens of thousands of lightning flashes occurred.<ref name="Andrews"/> Between 05:00 and 06:00 UTC on 15 January 2022, 200,000 flashes were recorded.<ref name="Andrews">{{cite web|author1=Robin George Andrews|title=The Tonga eruption explained, from tsunami warnings to sonic booms |url=https://www.nationalgeographic.com/science/article/the-science-behind-the-tonga-eruption-and-tsunami|publisher=National Geographic|access-date=16 January 2022|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050559/https://www.nationalgeographic.com/science/article/the-science-behind-the-tonga-eruption-and-tsunami|url-status=live}}</ref><ref>{{cite tweet|link=no |author=Chris Vagasky|user=COweatherman|number=1482352436849176577|title=Some hourly statistics from this latest #HungaTongaHungaHaapai #HungaTonga #Volcano Eruption. Peak hourly rate was 200,000 discharges between 0500 and 0600 UTC! Just absolutely amazing|access-date=16 January 2022|archive-url=https://archive.today/wpUH7|archive-date=19 January 2022|url-status=live}}</ref>

Preliminary observations showed that the eruption column ejected a large amount of volcanic material into the stratosphere, leading to speculation that it would cause a temporary climate cooling effect.<ref>{{cite tweet|link=no|user=Weather_West|number=1482371720237490178|date=15 January 2022|title=It appears likely that massive Hunga-Tonga eruption produced powerful enough eruption plume to inject significant amount of material well into stratosphere. Violent eruption of tropical volcano like this fits profile of event that could have small, temporary climate effect...|archive-date=16 January 2022|archive-url=http://archive.today/20220116082119/https://twitter.com/Weather_West/status/1482371720237490178}}</ref> Later calculations showed it injected an estimated 400,000 tonnes of sulfur dioxide into the stratosphere and was unlikely to have any global cooling effect.<ref>{{cite web|last=Morton|first=Jamie|date=17 January 2022|title=No, Hunga-Tonga eruption won't slow global warming|url=https://www.nzherald.co.nz/nz/no-hunga-tonga-eruption-wont-slow-global-warming/MWLPEPNRN4VRRSLRAB6OR6QT7E/|url-status=live|archive-url=https://ghostarchive.org/archive/dA1vr|archive-date=17 January 2022|access-date=17 January 2022|newspaper=The New Zealand Herald}}</ref> Despite this, the eruption can have a cooling effect in the Southern Hemisphere, causing slight cooling of winters and spectacular sunsets. People living in the Southern Hemisphere can expect purple sunsets for a few months after the eruption. A cooling effect of {{cvt|0.1|-|0.5|C-change|F-change}} may last until spring (September–November) 2022.<ref name="Cardwell">{{cite news|author1=Hamish Cardwell|date=17 January 2022|title=Tonga eruption could have 'cooling effect' on southern hemisphere|publisher=Radio New Zealand|url=https://www.rnz.co.nz/news/national/459707/tonga-eruption-could-have-cooling-effect-on-southern-hemisphere-scientist|url-status=live|access-date=17 January 2022|archive-url=https://web.archive.org/web/20220117063231/https://www.rnz.co.nz/news/national/459707/tonga-eruption-could-have-cooling-effect-on-southern-hemisphere-scientist|archive-date=17 January 2022}}</ref> The eruption was described as a once-in-a-thousand-year event for the Hunga caldera.<ref>{{cite web|date=16 January 2022|title=Tonga volcano eruption and tsunami: No power, communications still down|url=https://www.rnz.co.nz/international/pacific-news/459628/tonga-volcano-eruption-and-tsunami-no-power-communications-still-down|url-status=live|access-date=16 January 2022|publisher=RNZ|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115220452/https://www.rnz.co.nz/international/pacific-news/459628/tonga-volcano-eruption-and-tsunami-no-power-communications-still-down}}</ref><ref>{{cite web |url=https://theconversation.com/why-the-volcanic-eruption-in-tonga-was-so-violent-and-what-to-expect-next-175035|title=Why the volcanic eruption in Tonga was so violent, and what to expect next|publisher=The Conversation|author=Shane Cronin|date=16 January 2022|access-date=16 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115220616/https://theconversation.com/why-the-volcanic-eruption-in-tonga-was-so-violent-and-what-to-expect-next-175035|url-status=live}}</ref><ref name=":2">{{cite web|title=Tonga eruption likely the world's largest in 30 years|url=https://www.rnz.co.nz/news/world/459657/tonga-eruption-likely-the-world-s-largest-in-30-years|website=rnz.co.nz|date=17 January 2022|access-date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116200252/https://www.rnz.co.nz/news/world/459657/tonga-eruption-likely-the-world-s-largest-in-30-years-scientist|url-status=live}}</ref>

NASA satellite ''[[Engineering:Aura (satellite)|Aura]]'' detected the eruption using its [[Engineering:Microwave limb sounder|microwave limb sounder]]. It measures ozone, water vapor, and other atmospheric gases, and can penetrate obstacles such as ash clouds.<ref name="Koop1">{{Cite web |last=Koop |first=Fermin |date=2022-08-04 |title=The Tonga volcano sent enough water to the atmosphere to temporarily warm the planet |url=https://www.zmescience.com/science/news-science/tonga-volcano-sent-enough-water-to-the-atmosphere-to-warm-the-planet-04082022/ |access-date=2022-08-06 |website=ZME Science |language=en-US}}</ref> The underwater explosion also sent 146 million tons of water from the South Pacific Ocean into the stratosphere.<ref name="OCallaghan">{{cite news|last=O'Callaghan |first= Jonathan |date=8 June 2022 |title=Burst of underwater explosions powered Tonga volcano eruption |url=https://www.nature.com/articles/d41586-022-01544-y/ |work=Nature |quote=Millán&nbsp;... also found that the eruption sent up a water-vapour plume that reached a height of 53 kilometres, well into the stratosphere. This plume&nbsp;... increased the water-vapour content of the stratosphere by 146 teragrams, or 10%, and will probably remain in the atmosphere for at least a year.}}</ref> The amount of water vapor ejected was 10 percent of the stratosphere's typical stock.<ref name="Millán Santee Lambert Livesey 2022 p. ">{{cite journal | last1=Millán | first1=L. | last2=Santee | first2=M. L. | last3=Lambert | first3=A. | last4=Livesey | first4=N. J. | last5=Werner | first5=F. | last6=Schwartz | first6=M. J. | last7=Pumphrey | first7=H. C. | last8=Manney | first8=G. L. | last9=Wang | first9=Y. | last10=Su | first10=H. | last11=Wu | first11=L. | last12=Read | first12=W. G. | last13=Froidevaux | first13=L. | title=The Hunga Tonga‐Hunga Ha'apai Hydration of the Stratosphere | journal=Geophysical Research Letters | publisher=American Geophysical Union (AGU) | volume=49 | issue=13 | year=2022 | pages=e2022GL099381 | issn=0094-8276 | doi=10.1029/2022gl099381 | pmid=35865735 | pmc=9285945 | bibcode=2022GeoRL..4999381M }}</ref> It was enough to temporarily warm the surface of Earth. It is estimated that an excess of water vapour should remain for 5–10 years.<ref name="Koop1" />

[[File:ISS-66 Atmospheric plume from 2022 Hunga Tonga eruption (1).jpg|thumb|An image from the International Space Station of the spreading high altitude smoke cloud.]]

===Academic research===
According to a March 2022 paper in the journal ''Earthquake Research Advances'', Hunga Tonga–Hunga Haʻapai's plume reached a peak height of {{convert|58|km}} into the atmosphere and sustained heights greater than {{convert|30|km}}.<ref name="YuenEtAl">{{cite journal |author1=David A. Yuen |author2=Melissa A. Scruggs |author3=Frank J. Spera |author4=Yingcai Zheng |author5=Hao Hu |author6=Stephen R. McNutt |author7=Glenn Thompson |author8=Kyle Mandli |author9=Barry R. Keller |author10=Songqiao Shawn Wei |author11=Zhigang Peng |author12=Zili Zhou |author13=Francesco Mulargia |author14=Yuichiro Tanioka |date=July 2022 |title=Under the Surface: Pressure-Induced Planetary-Scale Waves, Volcanic Lightning, and Gaseous Clouds Caused by the Submarine Eruption of Hunga Tonga-Hunga Ha'apai Volcano Provide an Excellent Research Opportunity |journal=Earthquake Research Advances |volume=2 |issue=3 |doi=10.1016/j.eqrea.2022.100134 |s2cid=247550313}}</ref> The initial explosive event was possibly more powerful than the [[Earth:Hatepe eruption|Hatepe eruption]], even though Hatepe ejected over ten times the volume of material in a longer eruption.<ref>{{cite journal |last1=Illsley-Kemp |first1=Finnigan |last2=Barker |first2=Simon J. |last3=Wilson |first3=Colin J. N. |last4=Chamberlain |first4=Calum J. |last5=Hreinsdóttir |first5=Sigrún |last6=Ellis |first6=Susan |last7=Hamling |first7=Ian J. |last8=Savage |first8=Martha K. |last9=Mestel |first9=Eleanor R. H. |last10=Wadsworth |first10=Fabian B. |date=1 June 2021 |title=Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications |journal=Geochemistry, Geophysics, Geosystems |volume=22 |issue=6 |pages=1–27 |bibcode=2021GGG....2209803I |doi=10.1029/2021GC009803 |doi-access=free}}</ref> Hunga Tonga–Hunga Haʻapai erupted over a span of 12 hours, releasing {{convert|1.9|km3|abbr=on}} of ejecta with an estimated mass of 2,900 teragram. 

The ''ERA'' paper says the eruption correlated to a VEI of 5–6. An April 2022 research paper led by Poli and Shapiro and published by the [[Organization:American Geophysical Union|American Geophysical Union]] indicates that the eruption is the largest ever observed with modern instrumentation and estimates its VEI to be approximately 6.<ref name="Poli&Shapiro">{{cite journal |last1=Poli |first1=Piero |last2=Shapiro |first2=Nikolai M. |date=20 April 2022 |title=Rapid Characterization of Large Volcanic Eruptions: Measuring the Impulse of the Hunga Tonga Ha'apai Explosion From Teleseismic Waves |url=https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022GL098123 |journal=[[Organization:American Geophysical Union|American Geophysical Union]] |publisher=agupubs.onlinelibrary.wiley.com |volume=49 |issue=8 |doi=10.1029/2022GL098123 |bibcode=2022GeoRL..4998123P |s2cid=248309706 |archive-url=https://ghostarchive.org/archive/20220423030415/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2022GL098123 |archive-date=23 April 2022 |access-date=22 April 2022 |url-status=live }}</ref> Meanwhile, Vergoz and others estimate the blast yield to be 100–200 megatons of TNT and place the corresponding VEI at 5.8.<ref name="Vergoz22">{{cite journal |last1=Vergoz |first1=J. |last2=Hupe |first2=P. |last3=Listowski |first3=C. |last4=Le Pichon |first4=A. |last5=Garcés |first5=M.A. |last6=Marchetti |first6=E. |last7=Labazuy |first7=P. |last8=Ceranna |first8=L. |last9=Pilger |first9=C. |last10=Gaebler |first10=P. |last11=Näsholm |first11=S.P. |last12=Brissaud |first12=Q. |last13=Poli |first13=P. |last14=Shapiro |first14=N. |last15=De Negri |first15=R. |last16=Mialle |first16=P. |title=IMS observations of infrasound and acoustic-gravity waves produced by the January 2022 volcanic eruption of Hunga, Tonga: A global analysis |journal=Earth and Planetary Science Letters |date=2022 |volume=591 |page=117639 |doi=10.1016/j.epsl.2022.117639 |publisher=[[Company:Elsevier|Elsevier]]|bibcode=2022E&PSL.59117639V |s2cid=249357349 }}</ref>  Likewise, a study by Diaz and Rigby estimates the energetic output of the eruption to be equivalent to 61 megatons of [[Physics:TNT equivalent|TNT]], making the event more powerful than the largest nuclear bomb ever detonated (Tsar Bomba).<ref>{{Cite journal |last1=Díaz |first1=J. S. |last2=Rigby |first2=S. E. |date=2022-08-09 |title=Energetic output of the 2022 Hunga Tonga–Hunga Ha'apai volcanic eruption from pressure measurements |journal=Shock Waves |volume=32 |issue=6 |pages=553–561 |language=en |doi=10.1007/s00193-022-01092-4 |bibcode=2022ShWav..32..553D |s2cid=251480018 |issn=1432-2153}}</ref> The Smithsonian Institution [[Earth:Global Volcanism Program|Global Volcanism Program]] rated the eruption at VEI-5.<ref name="GVP" />

The ''ERA'' paper also concludes that this eruption resulted in the formation of a new caldera. In May 2022, scientists at the National Institute of Water and Atmospheric Research (NIWA) released a [[Earth:Bathymetry|bathymetry]] map indicating a large caldera measuring {{cvt|4|km}} in width formed from the eruption. Surveys also indicated that the caldera floor is located {{cvt|850|m}} below sea level. According to a volcanologist, the caldera walls continue to experience ongoing collapses.<ref name="AmosBBC1">{{cite news |last1=Amos |first1=Jonathan |title=Immense crater hole created in Tonga volcano |url=https://www.bbc.com/news/science-environment-61567521 |access-date=26 May 2022 |work=BBC |date=24 May 2022 |archive-date=24 May 2022 |archive-url=https://web.archive.org/web/20220524192011/https://www.bbc.com/news/science-environment-61567521 |url-status=live }}</ref><ref>{{Cite web |last=Martin |date=25 May 2022 |title=Hunga Tonga-Hunga Ha'apai volcano (Tonga): new bathymetry map of caldera |url=https://www.volcanodiscovery.com/hunga-tonga-hunga-haapai/news/181524/Hunga-Tonga-Hunga-Ha-apai-volcano-Tonga-new-bathymetry-map-of-caldera.html |url-status=live |archive-url=https://web.archive.org/web/20220526052042/https://www.volcanodiscovery.com/hunga-tonga-hunga-haapai/news/181524/Hunga-Tonga-Hunga-Ha-apai-volcano-Tonga-new-bathymetry-map-of-caldera.html |archive-date=26 May 2022 |access-date=2022-05-26 |website=www.volcanodiscovery.com |language=en}}</ref> Surveys of the seafloor around the volcano found large sediment piles, layers of fine mud and ash, and valleys up to {{cvt|50|km}} from the volcano. The survey indicated that an estimated {{cvt|6–7|km3}} of debris was added to a {{cvt|22,000|km2}} area seafloor.<ref name="AmosBBC2">{{cite news |last1=Amos |first1=Jonathan |title=Explosive Tonga volcano 'surprisingly intact' |url=https://www.bbc.com/news/science-environment-61529290 |access-date=26 May 2022 |work=BBC |date=24 May 2022 |archive-date=26 May 2022 |archive-url=https://web.archive.org/web/20220526045842/https://www.bbc.com/news/science-environment-61529290 |url-status=live }}</ref> Scientists also suggest that the volcano may still be erupting underwater.<ref>{{cite news |title=Evidence Tonga's volcano may still be erupting - NIWA |url=https://www.1news.co.nz/2022/05/23/evidence-tongas-volcano-may-still-be-erupting-niwa/ |access-date=26 May 2022 |work=1 News |date=23 May 2022 |archive-date=26 May 2022 |archive-url=https://web.archive.org/web/20220526045843/https://www.1news.co.nz/2022/05/23/evidence-tongas-volcano-may-still-be-erupting-niwa/ |url-status=live }}</ref>

A 2022 study in the journal ''Ocean Engineering'' by Heidarzadeh and others determined the size of the initial tsunami caused by the eruption. The study analyzed data from 22 tide gauges, eight [[Earth:Deep-ocean Assessment and Reporting of Tsunamis|Deep-ocean Assessment and Reporting of Tsunamis]] (DART) stations, eight atmospheric pressure time series, [[Spectral density estimation|spectral analysis]] and [[Computer simulation|computer simulation]]. It was concluded that the eruption displaced 6.60 × 10<sup>9</sup> m<sup>3</sup> of seawater, {{cvt|90|m}} in [[Physics:Amplitude|amplitude]], with a length of {{cvt|12|km}}.<ref name="Heidarzadeh22">{{cite journal |last1=Mohammad |first1=Heidarzadeh |last2=Gusman |first2=Aditya Riadi |last3=Ishibe |first3=Takeo |last4=Sabeti |first4=Ramtin |last5=Šepić |first5=Jadranka |title=Estimating the eruption-induced water displacement source of the 15 January 2022 Tonga volcanic tsunami from tsunami spectra and numerical modelling |journal=Ocean Engineering |date=1 October 2022 |volume=261 |page=112165 |doi=10.1016/j.oceaneng.2022.112165|s2cid=251562949 }}</ref>

<gallery mode="packed" heights="200">
File:Hunga Tonga–Hunga Haʻapai on Sentinel-2 L2A 20 December 2021 (cropped).jpg|Hunga Tonga-Hunga Haʻapai in December 2021
File:Hunga Tonga–Hunga Haʻapai on Sentinel-2 L2A 21 February 2022 (cropped).jpg|Hunga Tonga-Hunga Haʻapai in February 2022, after the eruption
</gallery>

== Tsunami ==
{{External media|float=Yes|title=Nuku'alofa Tonga|video1=[https://www.youtube.com/watch?v=CR-EMb3aEmE Video of the tsunami waves hitting the capital, filmed by a resident, Mamani moe me'a fakaofō on YouTube.]}}Tsunamis are most frequently caused by [[Earth:Earthquake|earthquake]]s, while those caused by volcanic eruptions are rare.<ref name="kreiger_15012022">{{cite news|last=Krieger|first=Lisa M.|date=15 January 2022|title=Volcanic tsunamis: Why they are so difficult to predict|newspaper=The Mercury News|url=https://www.mercurynews.com/2022/01/15/volcanic-tsunamis-why-they-are-so-difficult-to-predict/|url-access=registration|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116105727/https://www.mercurynews.com/2022/01/15/volcanic-tsunamis-why-they-are-so-difficult-to-predict/|archive-date=16 January 2022}}</ref><ref>{{cite news|last=Perry|first=Nick|date=16 January 2022|title=Tsunami threat recedes from huge Pacific volcanic eruption|newspaper=The Washington Post|agency=Associated Press|url=https://www.washingtonpost.com/world/tonga-issues-tsunami-warning-after-undersea-volcano-erupts/2022/01/15/a0ea00b2-75d6-11ec-a26d-1c21c16b1c93_story.html|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220115094605/https://www.washingtonpost.com/world/tonga-issues-tsunami-warning-after-undersea-volcano-erupts/2022/01/15/a0ea00b2-75d6-11ec-a26d-1c21c16b1c93_story.html |archive-date=15 January 2022}}</ref> Fewer than 100 volcanic tsunamis were recorded in the prior two centuries.<ref name="kreiger_15012022" /> According to an official at [[Earth:GNS Science|GNS Science]], the suspected cause of the tsunami was an undersea eruption that destroyed part of the island on 14 January. This allowed seawater to fill the volcanic vent, causing another undersea explosion the next day. The explosion was so huge that it penetrated through the overlying seawater and triggered the tsunami.<ref>{{cite news|date=17 January 2022|title=Shock waves, landslides may have caused 'rare' volcano tsunami: experts|work=France 24|agency=Agence France-Presse|url=https://www.france24.com/en/live-news/20220117-shock-waves-landslides-may-have-caused-rare-volcano-tsunami-experts|url-status=live|access-date=26 January 2022|archive-url=https://ghostarchive.org/archive/20220127010104/https://www.france24.com/en/live-news/20220117-shock-waves-landslides-may-have-caused-rare-volcano-tsunami-experts|archive-date=27 January 2022}}</ref>

Tsunami forecast models and alert systems which were intended to work for earthquake-generated tsunamis failed to consider the effects of the shockwaves on the tsunami as it radiated outwards. Shockwaves from the eruption caused abnormally high waves along the coasts of Peru and Japan. The tsunami waves also struck the coasts earlier than had been forecasted.<ref>{{cite news|date=1 February 2022|title=Tsunami models underestimated shockwave from Tonga eruption - expert|work=Radio New Zealand|url=https://www.rnz.co.nz/international/pacific-news/460661/tsunami-models-underestimated-shockwave-from-tonga-eruption-expert|url-status=live|access-date=3 February 2022|archive-url=https://ghostarchive.org/archive/20220203140231/https://www.rnz.co.nz/international/pacific-news/460661/tsunami-models-underestimated-shockwave-from-tonga-eruption-expert|archive-date=3 February 2022}}</ref>

=== Oceania ===
{{multiple image
 | width = 220
 | direction = vertical
 | image1 = Hunga Tonga 2022 tsunami travel time.jpg
 | caption1 = Travel time of the tsunami across the Pacific
 | image2 = Modeled maximum tsunami amplitude January 15, 2022 Tonga.png
 | caption2 = [[Organization:National Oceanic and Atmospheric Administration|NOAA]] tsunami energy map on Hunga Tonga–Hunga Haʻapai
}}
As a result of the eruption, a {{cvt|1.2|m}} tsunami<ref>{{cite web|date=15 January 2022|title=National No Threat Bulletin issued 4:58 pm AEDT Saturday 15 January 2022|url=http://www.bom.gov.au/tsunami/national.shtml#nationalBulletin0|archive-url=https://archive.today/20220115083048/http://www.bom.gov.au/tsunami/national.shtml%23nationalBulletin0#nationalBulletin0|archive-date=15 January 2022|access-date=15 January 2022|publisher=Australian Bureau of Meteorology}}</ref> struck the Tongan capital Nukuʻalofa.<ref name="1News1">{{cite news|date=15 January 2022|title=Waves hitting Tonga as volcano tsunami warning in place|publisher=1 News|url=https://www.1news.co.nz/2022/01/15/tsunami-warning-back-in-force-in-tonga-amid-reports-of-waves/|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155114/https://www.1news.co.nz/2022/01/15/waves-hitting-tonga-as-volcano-tsunami-warning-in-place/|archive-date=15 January 2022}}</ref><ref name="FBC">{{cite web|last=Waqairadovu|first=Apenisa|date=15 January 2022|title=Another tsunami warning issued for Tonga|url=https://www.fbcnews.com.fj/world/pacific-islands/another-tsunami-warning-issued-for-tonga/|url-status=live|archive-url=https://web.archive.org/web/20220115155141/https://www.fbcnews.com.fj/news/another-tsunami-warning-issued-for-tonga/|archive-date=15 January 2022|access-date=15 January 2022|publisher=FBC News}}</ref> Tide gauges in the city recorded waves {{cvt|1.5|–|2|m}} in height.<ref name="Turaga"/> Videos posted on the Internet showed a series of waves hitting the shore and homes, sweeping away debris.<ref name="SMH1">{{cite news|date=15 January 2022|title=Footage shows waves crashing into homes as tsunami warning sounds in Tonga|newspaper=The Sydney Morning Herald|url=https://www.smh.com.au/world/oceania/footage-shows-waves-crashing-into-homes-as-tsunami-warning-sounds-in-tonga-20220115-p59ohh.html|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115062247/https://www.smh.com.au/world/oceania/footage-shows-waves-crashing-into-homes-as-tsunami-warning-sounds-in-tonga-20220115-p59ohh.html|archive-date=15 January 2022}}</ref> Other videos show ashfall and a cloud of ash obscuring the sun.<ref name="1News1"/> According to a resident in the Tongan capital, a series of initial smaller explosions was heard. It was followed by a tsunami approximately 15 minutes later. The first wave was said to be the largest. A long white wave was observed out at sea approaching the coast. Three waves reportedly struck the coast.<ref name="1News5">{{cite news|title=Journalist based in Tonga describes 'huge' volcanic explosions |url=https://www.1news.co.nz/2022/01/15/journalist-based-in-tonga-describes-frightening-explosions/|access-date=15 January 2022|publisher=1 News|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115092315/https://www.1news.co.nz/2022/01/15/journalist-based-in-tonga-describes-frightening-explosions/|url-status=live}}</ref> In the wake of the tsunami, King Tupou VI was evacuated from the Royal Palace and traffic jams formed as locals fled inland or to higher ground.<ref>{{cite web|last=Kaniva Staff|date=15 January 2022|title=King evacuated as thousands flee for higher ground at Mataki'eua and Fualu height|url=https://www.kanivatonga.nz/2022/01/king-evacuated-as-thousands-flee-for-higher-ground-at-matakieua-and-fualu-height/|url-status=live|archive-url=https://web.archive.org/web/20220115195734/https://www.kanivatonga.nz/2022/01/king-evacuated-as-thousands-flee-for-higher-ground-at-matakieua-and-fualu-height/|archive-date=15 January 2022|access-date=16 January 2022|publisher=Kaniva Tonga}}</ref>

Based on an unofficial first-hand account of the tsunami in Tonga, the Risklayer think tank developed a tsunami inundation map. From the map, a tsunami with a height of {{cvt|15|m}} or greater may have struck the west coast of the island of Tongatapu, where heavy damage was observed.<ref>{{cite tweet|link=no|number=1482835280826716165|user=DrAndreasS|title=With a first unofficial report at hand (link below), I revisited my first tsunami simulation and compared it. Inundation for Hihifo seems close to observation. Inundation in Nuku'alofa probably overestimated. Some areas still with question marks. #Tonga #Tsunami #Nukualofa |author=Andreas Schäfer|date=16 January 2022}}</ref> The Tongan government, on 18 January 2022, confirmed waves of up to {{cvt|15|m}} struck the west coast of Tongatapu, ʻEua and Haʻapai islands.<ref name="ConsulateKoT"/> Tsunami surveys along the Tonga islands confirmed that a tsunami of {{cvt|20|m}} struck Nomuka, 65&nbsp;km northeast of the island. An {{cvt|18|m}} wave struck Kanokupolu, on Tongatapu. Waves measuring {{cvt|10|m}} were reported on islands greater than 85&nbsp;km away.<ref name="AmosBBC1" />

[[File:January 15, 2022 Tonga volcano-generated tsunami propagation.webm|thumb|Animation of the tsunami's propagation|299x299px|left]]

In Fiji, a tidal gauge in [[Place:Suva|Suva]] recorded a wave measuring {{cvt|20|cm}} at 17:40 local time. Some tsunami activity was also reported in the Lau Islands.<ref name="Turaga"/> The islands of Moce, Moala, Kadavu, and Taveuni were struck by low-level tsunamis that triggered flooding.<ref>{{cite web|last=Movono|first=Lice|date=16 January 2022|title=Tongan tsunami felt around the Pacific|url=https://www.rnz.co.nz/international/pacific-news/459626/tongan-tsunami-felt-around-the-pacific|url-status=live|archive-url=https://web.archive.org/web/20220115175141/https://www.rnz.co.nz/international/pacific-news/459626/tongan-tsunami-felt-around-the-pacific|archive-date=15 January 2022|access-date=15 January 2022|publisher=RNZ}}</ref>

In American Samoa, a tsunami measuring {{cvt|61|cm}} was recorded by tide gauges.<ref name="Smith"/> Niue, where residents evacuated coastal areas, reported no tsunami, despite tremors and the island's close proximity to Tonga.<ref name=tvniue/>

Tsunami waves of {{cvt|1|-|2.5|m}} were observed in several islands in Vanuatu. The Vanuatu Meteorology and Geo-hazards Department said tsunami activity was expected to persist for the night of 15 January 2022.<ref name="vmgd">{{cite web|date=15 January 2022|title=Weather Alert: Vanuatu Tsunami Advisory (January 15, 2022)|url=https://pg.usembassy.gov/weather-alert-vanuatu-tsunami-advisory-january-15-2022/|url-status=live|archive-url=https://archive.today/20220119154933/https://pg.usembassy.gov/weather-alert-vanuatu-tsunami-advisory-january-15-2022/|archive-date=19 January 2022|access-date=15 January 2022|publisher=US Embassy in Papua New Guinea, Solomon islands, and Vanuatu}}</ref> Waves up to {{cvt|0.8|m}} in height were recorded in Hanalei, Hawaii.<ref name="gbp"/>

A combination of a cyclone surge from Cyclone Cody and the tsunami caused extensive damage at a marina in Tutukaka in New Zealand.<ref>{{cite web|url=https://www.stuff.co.nz/national/127512707/new-zealand-civil-defence-issues-stayoffbeach-warning-following-tongan-tsunami|title=New Zealand Civil Defence issues stay-off-beach warning following Tongan tsunami|publisher=Stuff|date=16 January 2022|access-date=16 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115224911/https://www.stuff.co.nz/national/127512707/new-zealand-civil-defence-issues-stayoffbeach-warning-following-tongan-tsunami|url-status=live}}</ref> The waves pulled boats away from their moorings, taking some out into the bay and smashing some together, as well as damaging the structures at the marina. About eight to ten boats were completely sunk, with the total damage amounting to $5.93 million.<ref>{{cite web|last=Piper|first=Denise|date=16 January 2022|title=Tonga tsunami: Tutukaka damage has business wondering, 'what next?'|url=https://www.stuff.co.nz/national/127514751/tonga-tsunami-tutukaka-damage-has-business-wondering-what-next|url-status=live|archive-url=https://web.archive.org/web/20220117001002/https://www.stuff.co.nz/national/127514751/tonga-tsunami-tutukaka-damage-has-business-wondering-what-next|archive-date=17 January 2022|access-date=17 January 2022|publisher=Stuff}}</ref><ref>{{Cite web |title=Cost of natural disasters - ICNZ |url=https://www.icnz.org.nz/natural-disasters/cost-of-natural-disasters |access-date=2022-10-16 |website=www.icnz.org.nz |language=en-US}}</ref> According to Hauraki Gulf Weather, the tsunami struck on 16 January 2022 at between 01:05 and 01:10 local time on Great Barrier Island with a height of {{cvt|1.33|m}}.<ref name="1News6">{{cite news|title=Severe damage to Tutukaka Marina after Tonga tsunami surge|url=https://www.1news.co.nz/2022/01/15/severe-damage-to-tutukaka-marina-after-tonga-tsunami-surge/|access-date=16 January 2022|publisher=1 News|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050616/https://www.1news.co.nz/2022/01/15/severe-damage-to-tutukaka-marina-after-tonga-tsunami-surge/|url-status=live}}</ref> The tsunami caused flooding at Mahinepua Bay, where a campsite was located; all 50 individuals at the site were safe. A group of people fishing in Hokianga Harbour had to run for their lives to escape the waves, and reported having to drive through water over {{cvt|1|m}} deep.<ref>{{cite web|last1=Hunt|first1=Tom|last2=Piper|first2=Denise|date=16 January 2022|title=Fishers run for lives as Tongan tsunami hits New Zealand, warnings continue|url=https://www.stuff.co.nz/national/127512707/fishers-run-for-lives-as-tongan-tsunami-hits-new-zealand-warnings-continue|url-status=live|archive-url=https://web.archive.org/web/20220116075243/https://www.stuff.co.nz/national/127512707/fishers-run-for-lives-as-tongan-tsunami-hits-new-zealand-warnings-continue|archive-date=16 January 2022|access-date=16 January 2022|publisher=Stuff}}</ref> Unusual waves were recorded in Port Taranaki in [[Place:New Plymouth|New Plymouth]]. They lasted 24 hours, with the largest having a peak-to-peak height of {{cvt|1|m}} at 08:30 local time.<ref>{{Cite web|last=Groenestein|first=Catherine|date=18 January 2022|title=Tongan eruption tsunami felt in unusual waves at Port Taranaki|url=https://www.stuff.co.nz/taranaki-daily-news/news/300498112/tongan-eruption-tsunami-felt-in-unusual-waves-at-port-taranaki|archive-url=https://ghostarchive.org/archive/20220204230201/https://www.stuff.co.nz/taranaki-daily-news/news/300498112/tongan-eruption-tsunami-felt-in-unusual-waves-at-port-taranaki|archive-date=4 February 2022|access-date=4 February 2022|website=Stuff|language=en|url-status=live}}</ref> There were no casualties reported in New Zealand.<ref name="RNZ3">{{cite news|author1=Radio New Zealand|title=Strong tidal surges in New Zealand's Far North after Tonga Tsunami|url=https://www.newshub.co.nz/home/new-zealand/2022/01/strong-tidal-surges-in-new-zealand-s-far-north-after-tonga-tsunami.html|access-date=16 January 2022|publisher=Newshub|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050620/https://www.newshub.co.nz/home/new-zealand/2022/01/strong-tidal-surges-in-new-zealand-s-far-north-after-tonga-tsunami.html|url-status=live}}</ref>

In Australia, the Bureau of Meteorology said tsunami waves were observed throughout Saturday night on the shores along the east coast of Australia.<ref>{{cite web |last=Bureau of Meteorology |date=16 January 2021 |title=New South Wales Tsunami Bulletin |url=http://www.bom.gov.au/tsunami/nsw_alerts.shtml |url-status=live |archive-url=https://web.archive.org/web/20220115114444/http://www.bom.gov.au/tsunami/nsw_alerts.shtml |archive-date=15 January 2022 |access-date=16 January 2022}}</ref> Maximum tsunami waves of {{cvt|1.27|m}} were recorded at [[Earth:Norfolk Island|Norfolk Island]], {{cvt|1.10|m}} at [[Earth:Lord Howe Island|Lord Howe Island]], {{cvt|0.82|m}} at the Gold Coast, Queensland, {{cvt|0.77|m}} at Twofold Bay, New South Wales, and {{cvt|0.50|m}} at Hobart, Tasmania.<ref name=":0">{{cite news|date=15 January 2022|title=Tsunami warnings in place for Australia as Pacific feels effects of undersea volcano eruption|publisher=ABC News|url=https://www.abc.net.au/news/2022-01-15/tonga-issues-tsunami-warning-after-undersea-volcano-erupts/100759102|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220115111659/https://www.abc.net.au/news/2022-01-15/tonga-issues-tsunami-warning-after-undersea-volcano-erupts/100759102|archive-date=15 January 2022}}</ref><ref>{{cite web|date=15 January 2022|title=Tsunami hits Tonga after underwater volcanic eruption|url=https://www.theguardian.com/world/2022/jan/15/tonga-tsunami-warning-as-volcano-erupts-at-sea|archive-url=https://web.archive.org/web/20220117103832/https://www.theguardian.com/world/2022/jan/15/tonga-tsunami-warning-as-volcano-erupts-at-sea|archive-date=15 January 2022|access-date=16 January 2022|newspaper=The Guardian}}</ref>

=== Asia ===
In Kominato, Amami, Kagoshima, Japan, a {{cvt|1.2|m}} tsunami was reported at 23:55 on 15 January [[Japan Standard Time|JST]]. At Tosashimizu, Kōchi, the tsunami was {{cvt|0.9|m}} in height.<ref name="TBS">{{cite news|date=16 January 2022|title=【速報】各地で津波を観測|language=ja|trans-title=[Breaking news] Observing tsunamis in various places|publisher=TBS News|url=https://news.tbs.co.jp/newseye/tbs_newseye4448812.html|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115161218/https://news.tbs.co.jp/newseye/tbs_newseye4448812.html|archive-date=15 January 2022}}</ref><ref name="toonippo">{{cite news|date=16 January 2022|title=津波情報＝気象庁発表（津波観測に関する情報）|language=ja|trans-title=Tsunami information - Japan Meteorological Agency announcement (information on tsunami observation)|publisher=Web Tooku|url=https://www.toonippo.co.jp/articles/-/832840|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155652/https://www.toonippo.co.jp/articles/-/832840|archive-date=15 January 2022}}</ref> A tsunami measuring {{cvt|0.9|m}} was also reported in Chichijima Futami.<ref name="Sankei">{{cite news|date=16 January 2022|title=奄美に１・２メートルの津波到達 トンガ噴火影響か|language=ja|trans-title=A 1.2-meter tsunami reaches Amami. Is it due to the Tonga eruption?|publisher=Sankei Shimbun|url=https://www.sankei.com/article/20220116-XAGFJOVSKRO57HUWY5PSLWOAWI/|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155337/https://www.sankei.com/article/20220116-XAGFJOVSKRO57HUWY5PSLWOAWI/|archive-date=15 January 2022}}</ref> On the Tohoku coast, a {{cvt|0.7|m}} wave struck at 00:38 local time, on 16 January 2022. In the Sendai Port, the tsunami measured {{cvt|0.9|m}} at 00:08.<ref name="kahoku">{{cite news|date=16 January 2022|title=仙台港などでも津波観測 トンガ沖・海底火山噴火|language=ja|trans-title=Tsunami observation at Sendai Port, etc. Eruption of submarine volcano off Tonga|publisher=Kahoku News|url=https://kahoku.news/articles/20220116khn000002.html |url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115171633/https://kahoku.news/articles/20220116khn000002.html|archive-date=15 January 2022}}</ref> In Iwate Prefecture, a {{cvt|1.1|m}} tsunami was recorded at 02:26 on 16 January. The tallest tsunami was recorded {{cvt|1.34|m}} at Amami Ōshima, Okinawa.<ref>{{cite news |date=8 March 2022 |title=Large eruption occurs in Papua New Guinea; no tsunami in Japan |work=Kyodo News |location=Tokyo, Japan |url=https://english.kyodonews.net/news/2022/03/b5ee82bb103e-urgent-large-eruption-occurs-in-papua-new-guinea-japan-weather-agency.html |access-date=8 March 2022 |archive-url=https://ghostarchive.org/archive/20220309090307/https://english.kyodonews.net/news/2022/03/b5ee82bb103e-urgent-large-eruption-occurs-in-papua-new-guinea-japan-weather-agency.html |archive-date=9 March 2022 |url-status=live }}</ref> Tsunami waves of less than a metre were reported along the Hokkaido Pacific coast. This was the nation's first tsunami warning since the 2016 Fukushima earthquake.<ref name="JP">{{cite news|date=16 January 2022|title=Japan's Pacific coast hit by tsunami waves after Tonga eruption|newspaper=The Japan Times|url=https://www.japantimes.co.jp/news/2022/01/16/national/japan-tsunami-tonga-volcano/|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116065126/https://www.japantimes.co.jp/news/2022/01/16/national/japan-tsunami-tonga-volcano/?appsule=2|archive-date=15 January 2022}}</ref> The JMA said that the tsunami struck 2.5 hours earlier than predicted.<ref>{{cite news|date=16 January 2022|title=JMA: Tsunami from eruption lacks usual features|publisher=NHK|url=https://www3.nhk.or.jp/nhkworld/en/news/20220116_34/|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220125003142/https://www3.nhk.or.jp/nhkworld/en/news/20220116_34/|archive-date=16 January 2022}}</ref>
Small tsunami waves were observed on the coast of Taiwan. The heights of the tsunami were: {{cvt|0.4|m}} at Houbi Lake in Pingtung County, followed by {{cvt|0.38|m}}.

On [[Earth:Orchid Island|Orchid Island]], Taitung County, {{cvt|0.36|m}} in Yilan County, {{cvt|0.31|m}} in Su'ao, and {{cvt|0.29|m}} at Hualien County. Waves were also observed at Chenggong with a height of {{cvt|0.25|m}}, and at Kaohsiung for {{cvt|0.24|m}}.<ref name="Zixian">{{cite news|author1=Wu Zixian|date=16 January 2022|title=高屏宜花東海嘯水位「亮黃燈」？ 鄭明典揭台灣影響|language=zh|trans-title=Gaoping Yihua East tsunami water level "bright yellow"? Zheng Mingdian exposes the influence of Taiwan|work=United Daily News|url=https://udn.com/news/story/7266/6037148?from=udn-referralnews_ch2artbottom |url-status=live|access-date=20 January 2022|archive-url=https://web.archive.org/web/20220120005526/https://udn.com/news/story/7266/6037148?from=udn-referralnews_ch2artbottom|archive-date=20 January 2022}}</ref>

In Jeju Island, South Korea, there were fluctuations of up to {{cvt|15-20|cm}} in the sea level.<ref>{{cite web|last=Choi|first=Woo-ri |url=https://www.hani.co.kr/arti/english_edition/e_international/1027664.html|title=[News analysis] Volcano eruption in Tonga not likely to be last of this century, scientists warn|date=17 January 2022 |archive-date=17 January 2022|archive-url=https://archive.today/20220117160145/https://www.hani.co.kr/arti/english_edition/e_international/1027664.html|url-status=live|access-date=17 January 2022}}</ref>

Russia's Kuril Islands, in the country's far east, had tsunami waves of about {{cvt|20|cm}}.<ref name=nyt_16012022/><ref name=":1">{{cite web|last1=Храмова|first1=Светлана|last2=Гуськова|first2=Анастасия|date=15 January 2022|title=На Курилах объявили угрозу цунами|trans-title=Threat of tsunami has been declared in Kuril Islands|url=https://iz.ru/1277660/2022-01-15/na-kurilakh-obiavili-ugrozu-tcunami|url-status=live|archive-url=https://web.archive.org/web/20220115164617/https://iz.ru/1277660/2022-01-15/na-kurilakh-obiavili-ugrozu-tcunami?utm_source=twitter&utm_medium=social|archive-date=15 January 2022|access-date=16 January 2022|website=Известия|language=ru}}</ref> At least two ports were warned.<ref name=":1"/>

=== North America ===
The highest tsunami waves in the United States were {{cvt|1.3|m}} in Port San Luis in San Luis Obispo County (Southern California) and {{cvt|1.1|m}} in both Arena Cove and Crescent City (Northern California).<ref name=nyt_16012022/><ref name=mercurynews_15012022/> Significant waves hit the Santa Cruz Harbor,<ref name="CBSSF"/> and its parking lot was flooded with about {{cvt|0.91|m}} of water,<ref name="mercurynews_15012022">{{cite news|date=15 January 2022|title=Tsunami surges, some flooding in the Bay Area after Pacific volcano eruption|newspaper=The Mercury News|url=https://www.mercurynews.com/2022/01/15/tsunami-advisory-issued-for-bay-area-following-volcanic-eruption/|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220115213626/https://www.mercurynews.com/2022/01/15/tsunami-advisory-issued-for-bay-area-following-volcanic-eruption/|archive-date=15 January 2022}}</ref> while Soquel Creek in the neighboring city of Capitola flowed backwards.<ref>{{cite web|url=https://sanfrancisco.cbslocal.com/video/6186680-tsunami-coverage-waters-of-soquel-creek-reverse-during-tsunami-surge/|title=Tsunami Coverage: Waters of Soquel Creek Reverse During Tsunami Surge|website=KPIX-TV|access-date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116215317/https://sanfrancisco.cbslocal.com/video/6186680-tsunami-coverage-waters-of-soquel-creek-reverse-during-tsunami-surge/|url-status=live}}</ref> A surfing competition was cancelled.<ref>{{cite web|url=https://www.kazu.org/kazu-news/2022-01-15/here-are-the-impacts-of-the-tsunami-along-the-monterey-bay |title=Here are the impacts of the tsunami along the Monterey Bay |date=16 January 2022|access-date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050607/https://www.kazu.org/kazu-news/2022-01-15/here-are-the-impacts-of-the-tsunami-along-the-monterey-bay|url-status=live}}</ref> Strong currents in Half Moon Bay were reported,<ref name="CBSSF">{{cite news|date=15 January 2022|title=UPDATE: Tsunami Advisory Issued For Northern California Following Violent Volcanic Eruption Near Tonga|publisher=KPIX-TV|agency=Associated Press|url=https://sanfrancisco.cbslocal.com/2022/01/15/tsunami-advisory-issued-for-northern-california-following-violent-volcanic-eruption-near-tonga/|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155126/https://sanfrancisco.cbslocal.com/2022/01/15/tsunami-advisory-issued-for-northern-california-following-violent-volcanic-eruption-near-tonga/|archive-date=15 January 2022}}</ref> while small waves were observed at Seal Beach.<ref name="SCS1">{{cite news|agency=Associated Press|title=Volcano erupts in Pacific, West Coast under tsunami advisory|url=https://www.santacruzsentinel.com/2022/01/15/volcano-erupts-in-pacific-west-coast-under-tsunami-advisory/ |access-date=16 January 2022|work=Santa Cruz Sentinel|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050635/https://www.santacruzsentinel.com/2022/01/15/volcano-erupts-in-pacific-west-coast-under-tsunami-advisory/|url-status=live}}</ref> Waves up to {{cvt|0.37|m}} in height were recorded in Nikolski, Alaska.<ref>{{cite web|last=McChesney|first=Rashah|date=15 January 2022|title=A tsunami is arriving in Alaska from volcanic eruption in Tonga|url=https://www.ktoo.org/2022/01/15/tsunami-in-alaska-after-tonga-volcano-erupts/|archive-url=https://web.archive.org/web/20220115180401/https://www.ktoo.org/2022/01/15/tsunami-in-alaska-after-tonga-volcano-erupts/|archive-date=15 January 2022|access-date=15 January 2022|publisher=KTOO}}</ref>

There was an unusually high tide along the coasts of British Columbia and Vancouver Island. At 11:55 am local time, the [[Earth:Pacific Tsunami Warning Center|Pacific Tsunami Warning Center]] (PTWC) said tide levels rose {{cvt|29|cm}} in Winter Harbour. Large logs were pushed up by the high tides and deposited on the beaches.<ref>{{cite news|author1=Carla Wilson|title=Vancouver Island communities feel tsunami effects of undersea volcano eruption near Tonga|url=https://www.timescolonist.com/local-news/vancouver-island-communities-feel-tsunami-effects-of-undersea-volcano-near-new-zealand-4959925|access-date=17 January 2022|newspaper=Times Colonist|date=17 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050836/https://www.timescolonist.com/local-news/vancouver-island-communities-feel-tsunami-effects-of-undersea-volcano-near-new-zealand-4959925|url-status=live}}</ref>

The tsunami was first detected along the coastline of Mexico on January 15 at 12:35 by tide gauges at Michoacán.<ref name="Ramírez-Herrera22">{{cite journal |last1=Ramírez-Herrera |first1=María Teresa |last2=Coca |first2=Oswaldo |last3=Vargas-Espinosa |first3=Victor |title=Tsunami Effects on the Coast of Mexico by the Hunga Tonga-Hunga Ha'apai Volcano Eruption, Tonga |journal=Pure and Applied Geophysics |date=2022 |volume=179 |issue=4 |pages=1117–1137 |doi=10.1007/s00024-022-03017-9 |pmid=35431340 |pmc=8995168 |bibcode=2022PApGe.179.1117R }}</ref> At the coasts of Guerrero, Oaxaca, and Baja California Peninsula, sea level rise was reported with waves of {{cvt|30|cm}} to {{cvt|61|cm}}.<ref>{{cite web|date=15 January 2022|title=México presentó elevación del nivel del mar en las costas del Pacífico por explosión de volcán en Tonga|trans-title=Mexico presented a rise in sea level on the Pacific coast due to the explosion of a volcano in Tonga|url=https://www.infobae.com/america/mexico/2022/01/15/mexico-presento-en-las-costas-del-pacifico-elevacion-del-nivel-del-mar-por-explosion-de-volcan-en-tonga/|archive-url=https://web.archive.org/web/20220115182359/https://www.infobae.com/america/mexico/2022/01/15/mexico-presento-en-las-costas-del-pacifico-elevacion-del-nivel-del-mar-por-explosion-de-volcan-en-tonga/|archive-date=15 January 2022|access-date=15 January 2022|publisher=Infobae|language=es-MX}}</ref> A tide level of {{cvt|2.05|m}} was measured at Manzanillo, Colima, according to the Mareographic Service of the Institute of Geophysics of the National Autonomous University of Mexico. The tsunami had an amplitude of {{cvt|1.19|m}} in Zihuatanejo. Waves of just under {{cvt|1|m}} were recorded in Acapulco, Huatulco, and Salina Cruz.<ref name="Paudal">{{cite news|title=Tonga: Tide in Manzanillo rose more than two meters due to tsunami|url=https://www.paudal.com/2022/01/16/tonga-tide-in-manzanillo-rose-more-than-two-meters-due-to-tsunami/|access-date=16 January 2022|publisher=Paudal|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050630/https://www.paudal.com/2022/01/16/tonga-tide-in-manzanillo-rose-more-than-two-meters-due-to-tsunami/|url-status=live}}</ref> Tsunami activity along the Pacific coast persisted until January 20. The tsunami measured taller than {{cvt|2|m}} at Ensenada, Baja California. Sea level disturbances were recorded at the coast of the Gulf of Mexico and Caribbean Sea. The shockwave-triggered [[Physics:Meteotsunami|meteotsunami]] had a maximum wave height of {{cvt|0.377|m}}.<ref name="Ramírez-Herrera22" />

Minor tsunamis were measured as far away as the Caribbean Sea and {{wipe|Texas}}, with [[Organization:National Oceanic and Atmospheric Administration|National Oceanic and Atmospheric Administration]] (NOAA) reporting a maximum rise of {{cvt|12|cm}} at the Isla de Mona in Puerto Rico at 16:11 UTC.<ref>{{cite report|publisher=National Weather Service Pacific Tsunami Warning Center|date=15 January 2022|access-date=15 January 2022|title=Tsunami Information Statement Number 1 |url=https://www.tsunami.gov/events/PHEB/2022/01/15/22015050/1/WECA43/WECA43.txt|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115201720/https://www.tsunami.gov/events/PHEB/2022/01/15/22015050/1/WECA43/WECA43.txt}}</ref> These may have been [[Physics:Meteotsunami|meteo-tsunamis]] related to slight atmospheric pressure changes.<ref name="Klemetti_2022">{{cite web|author=Erik Klemetti|date=15 January 2022|title=Major blast in Tonga create tsunami and heavy ash fall|url=https://www.discovermagazine.com/planet-earth/major-blast-in-tonga-create-tsunami-and-heavy-ash-fall|url-access=registration|url-status=live|archive-url=https://web.archive.org/web/20220115205544/https://www.discovermagazine.com/planet-earth/major-blast-in-tonga-create-tsunami-and-heavy-ash-fall|archive-date=15 January 2022|access-date=17 January 2022|publisher=Discover Magazine}}</ref>

=== South America ===
In Peru, two people were killed in Lambayeque, where the tsunami measured {{cvt|2|m}}.<ref name="Parra"/> Waves measuring {{cvt|0.68|m}} were recorded in the port of Callao, {{cvt|0.72|m}} in Marcona District and {{cvt|0.65|m}} in Paita.<ref name="CNN1">{{cite news|date=15 January 2022|title=Perú: Oleaje anómalo afectó al litoral peruano a pesar que la Armada había descartado un tsunami en las costas del país|language=es|trans-title=Peru: Anomalous waves affected the Peruvian coast despite the fact that the Navy had ruled out a tsunami on the country's coast|publisher=CNN Chile|url=https://www.cnnchile.com/mundo/peru-oleaje-litoral-marina-descarto-tsunami-costas_20220115/|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050617/https://www.cnnchile.com/mundo/peru-oleaje-litoral-marina-descarto-tsunami-costas_20220115/|archive-date=16 January 2022}}</ref>

Significant sea level disturbances were measured off the coast of Ecuador's La Libertad, [[Place:Esmeraldas, Ecuador|Esmeraldas]], and Manta. At 2:33 am local time, a 50&nbsp;cm rise in sea level was measured on the mainland. There were also sea level changes in the Galapagos Islands.<ref name="ComercioEC">{{cite news |date=15 January 2022 |title=Se cancela alerta de tsunami en la costa de Ecuador |language=es |trans-title=Tsunami alert canceled off the coast of Ecuador |work=El Comercio |agency= |url=https://www.elcomercio.com/actualidad/ecuador/cancelacion-alerta-tsunami-costa-ecuador.html |access-date=13 March 2022 |archive-url=https://ghostarchive.org/archive/20220313030350/https://www.elcomercio.com/actualidad/ecuador/cancelacion-alerta-tsunami-costa-ecuador.html |archive-date=13 March 2022 |url-status=live }}</ref> Sea level disturbances off the nation's coast persisted for nearly an hour.<ref>{{cite news |date=15 January 2022 |title=Ecuador mantiene monitoreo de tsunami para la costa continental e insular |language=es |trans-title=Ecuador maintains tsunami monitoring for the continental and insular coast |work=El Universo |agency= |url=https://www.eluniverso.com/noticias/ecuador/en-vivo-inocar-emite-alerta-de-tsunami-para-puerto-ayora-en-galapagos-nota/ |access-date=13 March 2022 |archive-url=https://ghostarchive.org/archive/20220313040301/https://www.eluniverso.com/noticias/ecuador/en-vivo-inocar-emite-alerta-de-tsunami-para-puerto-ayora-en-galapagos-nota/ |archive-date=13 March 2022 |url-status=live }}</ref>

In northern Chile, waves of up to {{cvt|2|m}} struck the coastline. Videos and images on social media from the [[Place:Los Ríos Region|Los Ríos Region]] showed the tsunami damaging piers, carrying boats and hitting beaches.<ref name="Comercio2"/> A tsunami of {{cvt|1.74|m}} was measured at Chañaral.<ref>{{cite news|title=Australia sends surveillance flight to tsunami-hit Tonga as extent of damage still unknown |url=https://www.sbs.com.au/news/australia-sends-surveillance-flight-to-tsunami-hit-tonga-as-extent-of-damage-still-unknown/f63d5a0e-3e93-4b66-8d37-5267e51b5786|access-date=17 January 2022|publisher=SBS News |date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117010201/https://www.sbs.com.au/news/australia-sends-surveillance-flight-to-tsunami-hit-tonga-as-extent-of-damage-still-unknown/f63d5a0e-3e93-4b66-8d37-5267e51b5786|url-status=live}}</ref>

== Response ==
=== 14 January ===
[[File:2022 Tonga Tsunami warning！ in Gesashi mangrove bay.jpg|thumb|upright=1.0|right|A tsunami warning signboard at Gesashi Bay Mangrove Forest, Okinawa Prefecture, Japan]]A tsunami warning was issued on 14 January in Tonga after an eruption was observed. Volcanic activity decreased following that eruption and the warning was lifted in the early morning of 15 January. A {{cvt|30|cm}} wave was observed during the first tsunami warning.<ref name="RNZ2">{{cite news|url=https://www.rnz.co.nz/international/pacific-news/459617/tsunami-warning-now-issued-for-all-of-tonga |title=Tsunami warning now issued for all of Tonga|access-date=15 January 2022|publisher=Radio New Zealand|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155123/https://www.rnz.co.nz/international/pacific-news/459617/tsunami-warning-now-issued-for-all-of-tonga|url-status=live}}</ref>

=== 15 January ===
Another warning was issued to the whole of Tonga on the evening of 15 January following the next eruption.<ref name="RNZ2"/> Warning sirens blared in Nukuʻalofa while authorities urged residents to flee to higher ground.<ref name="Clark">{{cite news|author1=George Clark|title=Hunga-Tonga-Hunga-Ha'apai eruption: Tsunami alert for Tonga following underwater volcanic eruption |url=https://www.nzherald.co.nz/world/hunga-tonga-hunga-haapai-eruption-tsunami-alert-for-tonga-following-underwater-volcanic-eruption/3XYZ6SL6QG7DTWZP35PICVMA3A/|access-date=15 January 2022|newspaper=The New Zealand Herald|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155114/https://www.nzherald.co.nz/world/tonga-tsunami-hunga-tonga-hunga-haapai-eruption-surging-waves-hit-island-nation/3XYZ6SL6QG7DTWZP35PICVMA3A/|url-status=live}}</ref>

The Mineral Resources Department in Fiji issued advisories to people living around the coastal areas to stay away from the shores.<ref>{{cite web|last=Reece|first=Lena|title=Tsunami alert in effect for Fiji|url=https://www.fbcnews.com.fj/news/tsunami-alert-in-effect-for-fiji/|archive-url=https://web.archive.org/web/20220115155123/https://www.fbcnews.com.fj/news/tsunami-alert-in-effect-for-fiji/|archive-date=15 January 2022|access-date=15 January 2022|website=Fiji Broadcasting Corporation}}</ref> Evacuations were made on the Lau Islands after wave activity was observed in the sea.<ref name="Turaga">{{cite news|author1=Semi Turaga|author2=Vijay Narayan|title=Full Story: Stay out of the water & away from the shore due to strong currents & dangerous waves – Mineral Resources Department |url=https://www.fijivillage.com/feature/Stay-out-of-the-water--away-from-the-shore-due-to-strong-currents--dangerous-waves---Mineral-Resources-Department-4rf8x5/|access-date=15 January 2022|agency=Fiji village |archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155116/https://www.fijivillage.com/feature/Stay-out-of-the-water--away-from-the-shore-due-to-strong-currents--dangerous-waves---Mineral-Resources-Department-4rf8x5/|url-status=live}}</ref> Fiji's Attorney General Aiyaz Sayed-Khaiyum urged the public to stay indoors and cover household water tanks in the event of rain due to the risk of fallout of [[Chemistry:Sulfuric acid|sulfuric acid]] from the {{chem|SO|<sub>2</sub>}} emitted in the air by the eruption.<ref>{{Cite web|last=Singh|first=Shanil|title=AG urging people to cover water tanks & stay indoors during rain due to the risk of sulfuric acid|url=https://www.fijivillage.com/news/AG-urging-people-to-cover-water-tanks--stay-indoors-during-rain-due-to-the-risk-of-sulfuric-acid-rfx854/|access-date=15 January 2022 |publisher=Fiji village|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155119/https://www.fijivillage.com/news/AG-urging-people-to-cover-water-tanks--stay-indoors-during-rain-due-to-the-risk-of-sulfuric-acid-rfx854/|url-status=live}}</ref> In Wallis and Futuna, a tsunami warning was issued, but no damage was reported and the alert was lifted in the evening of 15 January.<ref>{{cite web|date=15 January 2022|title=Eruption aux Tonga: alerte tsunami déclenchée à Wallis et Futuna|trans-title=Eruption in Tonga: tsunami alert triggered in Wallis and Futuna |url=https://la1ere.francetvinfo.fr/wallisfutuna/eruption-aux-tonga-alerte-tsunami-declenchee-a-wallis-et-futuna-1204195.html|url-status=live|archive-url=https://web.archive.org/web/20220115171101/https://la1ere.francetvinfo.fr/wallisfutuna/eruption-aux-tonga-alerte-tsunami-declenchee-a-wallis-et-futuna-1204195.html|archive-date=15 January 2022|access-date=17 January 2022|publisher=Wallis-et-Futuna la 1ère|language=fr-FR}}</ref>

Tsunami warnings were also issued to American Samoa by the PTWC.<ref name="PTWC1">{{cite web|title=Message: American Samoa Warn/Adv./Watch #1|url=https://www.tsunami.gov/?p=PHEB/2022/01/15/22015050/1/WEZS40 |website=tsunami.gov|publisher=Pacific Tsunami Warning Center|access-date=15 January 2022|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115065119/https://www.tsunami.gov/?p=PHEB%2F2022%2F01%2F15%2F22015050%2F1%2FWEZS40|url-status=live}}</ref><ref>{{Cite web |date=14 January 2022 |title=Tsunami Message Number 1 ''A Tsunami Advisory is now in effect for American Samoa'' |url=https://tsunami.gov/events/PHEB/2022/01/15/22015050/1/WEZS40/WEZS40.txt |archive-url=https://web.archive.org/web/20220325025323/https://tsunami.gov/events/PHEB/2022/01/15/22015050/1/WEZS40/WEZS40.txt |archive-date=25 March 2022 |access-date=25 March 2022 |website=tsunami.gov. |publisher=US. Tsunami Warning Centers}}</ref> The PTWC considered the tsunami "hazardous" and warned that changes in sea level, as well as strong currents, could pose a risk along the coast.<ref name="R1">{{cite news|last1=Nidumolu|first1=Jahnavi|last2=Jose|first2=Renju|last3=Chang-Ran Kim|date=15 January 2022|title=Tonga volcano generates tsunami, U.S. tsunami monitor said|work=Reuters|url=https://www.reuters.com/business/environment/tonga-volcano-generates-tsunami-us-tsunami-monitor-said-2022-01-15/|url-status=live|url-access=registration|access-date=16 January 2022|archive-url=https://archive.today/20220116075809/https://www.reuters.com/business/environment/tonga-volcano-generates-tsunami-us-tsunami-monitor-said-2022-01-15/|archive-date=16 January 2022}}</ref> Samoa later issued a tsunami advisory.<ref>{{cite web|url=https://www.samoaobserver.ws/category/samoa/96733|title=Samoa's MET issues tsunami warning|publisher=Samoa Observer|author=Sialai Sarafina Sanerivi|date=15 January 2022|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115072850/https://www.samoaobserver.ws/category/samoa/96733|archive-date=15 January 2022}}</ref> The PTWC later cancelled the tsunami warning for American Samoa.<ref>{{cite news|last1=Ufi|first1=Elizabeth|title=Tsunami warning for American Samoa canceled|url=https://www.khon2.com/local-news/tsunami-warning-for-american-samoa-due-to-volcanic-activity-in-tonga-no-threat-to-hawaii/|access-date=15 January 2022|publisher=KHON-TV|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155133/https://www.khon2.com/local-news/tsunami-warning-for-american-samoa-due-to-volcanic-activity-in-tonga-no-threat-to-hawaii/|url-status=live}}</ref>

The National Emergency Management Agency of New Zealand told residents to expect "strong and unusual currents and unpredictable surges" along the north and east coast of North Island, as well as the [[Earth:Chatham Islands|Chatham Islands]].<ref>{{cite tweet|link=no|user=NZcivildefence|date=15 January 2022|number=1482249845943717888|title=We have issued a National Advisory: Tsunami Activity following the Tongan eruption. We expect New Zealand coastal areas on the north and east coast of the North Island and the Chatham Islands to experience strong and unusual currents and unpredictable surges at the shore.|archive-url=https://archive.today/JfF10|archive-date=19 January 2022|url-status=live}}</ref> The agency added that the currents have the potential to injure and drown people.<ref name="Hewett">{{cite news|author1=William Hewett|date=15 January 2022|title=National Emergency Management Agency issues tsunami advisory for New Zealand after Tonga volcano eruption|publisher=Newshub|url=https://www.newshub.co.nz/home/new-zealand/2022/01/national-emergency-management-agency-issues-tsunami-advisory-for-new-zealand-after-tonga-volcano-eruption.html|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220122121046/https://www.newshub.co.nz/home/new-zealand/2022/01/national-emergency-management-agency-issues-tsunami-advisory-for-new-zealand-after-tonga-volcano-eruption.html|archive-date=15 January 2022}}</ref>

A tsunami warning was issued by the Bureau of Meteorology in Australia, with a land warning issued for [[Earth:Norfolk Island|Norfolk Island]] and [[Earth:Lord Howe Island|Lord Howe Island]], and a marine warning for the east coast of Australia, Tasmania, and Macquarie Island.<ref name=":0"/> On 16 January, at 06:55 AEDT (15 January 2022, 19:55 UTC), tsunami marine warnings were issued to New South Wales, Queensland, Victoria, and Tasmania for strong and dangerous currents.<ref name="Hussey">{{cite news|author1=Sam Hussey|author2=Gus Bruno|title=Beaches evacuated and closed as Bureau of Meteorology updates tsunami warning for Australia's east coast |url=https://7news.com.au/weather/tsunami/tonga-tsunami-triggers-marine-warnings-c-5324422|access-date=16 January 2022|publisher=7News|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050616/https://7news.com.au/weather/tsunami/tonga-tsunami-triggers-marine-warnings-c-5324422|url-status=live}}</ref>

The Japan Meteorological Agency (JMA) informed residents that a slight disturbance in the sea could occur without any damage.<ref name="gbp">{{cite news|date=15 January 2022|title=A volcano erupts in the Pacific, triggering a tsunami advisory for the West Coast|publisher=Georgia Public Broadcasting|agency=Associated Press|url=https://www.gpb.org/news/2022/01/15/tonga-hit-by-tsunami-after-undersea-volcano-eruption|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155108/https://www.gpb.org/news/2022/01/15/volcano-erupts-in-the-pacific-triggering-tsunami-advisory-for-the-west-coast|archive-date=15 January 2022}}</ref> The tsunami would not pose a threat to the Japanese coastline. Officials from the JMA said that sea level rise of no more than {{cvt|20|cm}} could be expected for 24 hours from 9:00&nbsp;p.m. [[Japan Standard Time]] (UTC+9).<ref name="NHK">{{cite news|date=15 January 2022|title=Officials: No tsunami threat to Japan|publisher=NHK|url=https://www3.nhk.or.jp/nhkworld/en/news/20220115_19/|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155215/https://www3.nhk.or.jp/nhkworld/en/news/20220115_19/|archive-date=15 January 2022}}</ref> A tsunami warning was issued in the Amami Islands and Tokara Islands by the JMA with forecasted waves of up to {{cvt|3|m}}. Additional warnings were issued to the east and southeast coast for waves of up to {{cvt|1|m}}.<ref name="NHK1">{{cite news|date=16 January 2022|title=奄美群島・トカラ列島に津波警報（予想高さ ３ｍ）|language=ja|trans-title=Tsunami warning on Amami Islands and Tokara Islands (estimated height 3m)|publisher=NHK |url=https://www3.nhk.or.jp/news/html/20220116/k10013432891000.html|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115151908/https://www3.nhk.or.jp/news/html/20220116/k10013432891000.html|archive-date=15 January 2022}}</ref> A warning and evacuation order was issued to Iwate Prefecture, and evacuation orders were also issued to six other prefectures. The Fire and Disaster Management Agency (FDMA) said that 229,000 residents living in the eight prefectures were evacuated.<ref>{{cite news|date=15 January 2022|title=津波注意報、全地域で解除 トンガ沖の海底噴火|language=ja|trans-title=Tsunami warning released in all areas Submarine eruption off Tonga|publisher=Nikkei Asia|url=https://www.nikkei.com/article/DGXZQOUE154CX0V10C22A1000000/|url-status=live|access-date=15 January 2022|archive-url=https://archive.today/20220119101919/https://www.nikkei.com/article/DGXZQOUE154CX0V10C22A1000000/|archive-date=19 January 2022|quote=Nikkei}}</ref> Japan downgraded its warnings the following morning. Russia issued a tsunami advisory for the Kuril Islands.<ref name=nyt_16012022/>

The National Tsunami Warning Center issued a tsunami advisory along the West Coast of the United States and British Columbia, Canada.<ref name="Hamer"/><ref>{{cite news|last1=Bartiromo|first1=Michael|last2=Nexstar Media Wire|date=15 January 2022|title=Tsunami advisory issued for West Coast after eruption of undersea volcano|publisher=WRIC-TV|url=https://www.wric.com/news/u-s-world/tsunami-advisory-issued-for-west-coast-after-eruption-of-undersea-volcano/|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155220/https://www.wric.com/news/u-s-world/tsunami-advisory-issued-for-west-coast-after-eruption-of-undersea-volcano/|archive-date=15 January 2022}}</ref> The advisory contained all U.S. areas along the West Coast from Southern California to [[Earth:Alaska|Alaska]].<ref>{{cite news|last=The Associated Press|first=Scripps National|date=15 January 2022|title=Tsunami advisory issued for West Coast after underwater volcano erupts near Tonga|publisher=KGTV|url=https://www.10news.com/news/national/tsunami-advisory-issued-for-west-coast-after-underwater-volcano-erupts-near-tonga|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155115/https://www.10news.com/news/national/tsunami-advisory-issued-for-west-coast-after-underwater-volcano-erupts-near-tonga|archive-date=15 January 2022}}</ref> Beaches were closed,<ref>{{cite news|last1=Ryan|first1=Harriet|last2=James|first2=Ian|last3=Lopez|first3=Robert|last4=Do|first4=Anh|date=15 January 2022|title=Tsunami advisory issued for California coast; beaches closed, waves expected|newspaper=Los Angeles Times|url=https://www.latimes.com/california/story/2022-01-15/tsunami-warning-issued-for-california-beaches-from-volcano-explosion|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115160735/https://www.latimes.com/california/story/2022-01-15/tsunami-warning-issued-for-california-beaches-from-volcano-explosion|archive-date=15 January 2022}}</ref> and coastal residents were requested to move to higher ground.<ref name="Kwan">{{cite news|author1=Rhoda Kwan|title=Tsunami advisory issued for U.S. West Coast after undersea volcanic eruption |url=https://www.nbcnews.com/news/us-news/tsunami-advisory-issued-parts-us-west-coast-undersea-volcanic-eruption-rcna12350|access-date=15 January 2022|publisher=NBC News|date=15 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155137/https://www.nbcnews.com/news/us-news/tsunami-advisory-issued-parts-us-west-coast-undersea-volcanic-eruption-rcna12350|url-status=live}}</ref> A surfing contest with over 100 participants was cancelled in Santa Cruz, California.<ref name=mercurynews_15012022/><ref>{{cite news|first=Jim|last=Seimas|title=Tsunami forces cancellation of Day 1 of USA Surfing Prime Steamer Lane|date=15 January 2021|newspaper=Santa Cruz Sentinel|url=https://www.santacruzsentinel.com/2022/01/15/tsunami-forces-cancellation-of-day-1-of-usa-surfing-prime-steamer-lane/|access-date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116051127/https://www.santacruzsentinel.com/2022/01/15/tsunami-forces-cancellation-of-day-1-of-usa-surfing-prime-steamer-lane/|url-status=live}}</ref> Tsunami waves measuring {{cvt|30-61|cm}} were expected to hit the shores as early as 7:30&nbsp;a.m. Pacific Standard Time (UTC−8) along the Central Coast.<ref name="Hamer"/> {{wipe|San Francisco}} was expected to receive waves at 8:10.<ref>{{cite web|date=15 January 2022|title=Update: Tsunami Advisory Issued For Northern California Following Violent Volcanic Eruption Near Tonga|url=https://sanfrancisco.cbslocal.com/2022/01/15/tsunami-advisory-issued-for-northern-california-following-violent-volcanic-eruption-near-tonga/|access-date=15 January 2022 |publisher=KPIX-TV|location=San Francisco|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115155126/https://sanfrancisco.cbslocal.com/2022/01/15/tsunami-advisory-issued-for-northern-california-following-violent-volcanic-eruption-near-tonga/|url-status=live}}</ref> The highest tsunami waves are expected one to two hours after the arrival of the first waves.<ref name="Hamer">{{cite news|author1=Cristal Hamer|date=15 January 2022|title=Tsunami advisory in effect on Central Coast following volcanic eruption near Tonga|publisher=KSBW|url=https://www.ksbw.com/article/1-2-foot-tsunami-waves-expected-on-central-coast-following-tongan-volcano-eruption/38776661#|url-status=live|access-date=15 January 2022|archive-url=https://web.archive.org/web/20220115202010/https://www.ksbw.com/article/1-2-foot-tsunami-waves-expected-on-central-coast-following-tongan-volcano-eruption/38776661|archive-date=15 January 2022}}</ref> A tsunami advisory was put in place for the entirety of Hawaii.<ref>{{cite web|date=15 January 2022|url=https://www.bigislandvideonews.com/2022/01/15/tsunami-advisory-for-hawai%CA%BBi-after-tonga-eruption/ |title=Tsunami Advisory For Hawaiʻi After Tonga Eruption|url-status=live|archive-url=https://web.archive.org/web/20220115180640/https://www.bigislandvideonews.com/2022/01/15/tsunami-advisory-for-hawai%ca%bbi-after-tonga-eruption/ |archive-date=15 January 2022|access-date=15 January 2022|website=bigislandvideonews.com}}</ref> Advisories in Canada were issued along the North and Central coasts of British Columbia, along with the Haida Gwaii archipelago and Vancouver Island. No evacuation order was issued, but people were urged to avoid beaches and marinas. The warning level was low due to the height of reported waves, as they were below the {{cvt|91|cm}} threshold which would warrant an upgrade.<ref>{{cite news|title=Tsunami advisories issued for parts of B.C. as undersea volcano erupts in Pacific |url=https://www.cbc.ca/news/world/tonga-volcano-eruption-tsunami-warning-1.6316391|access-date=15 January 2022|work=CBC News|publisher=Canadian Broadcasting Corporation|agency=Associated Press|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115084038/https://www.cbc.ca/news/world/tonga-volcano-eruption-tsunami-warning-1.6316391|url-status=live}}</ref> By 12:35 local time, the tsunami advisory for British Columbia would be cancelled.<ref>{{cite web |url=https://www.emergencyinfobc.gov.bc.ca/tsunami-advisory-bc-jan15/|title=CANCELLED: Tsunami Advisory for BC Coast: Volcanic Eruption near the Tonga Islands. January 15, 2022|website=emergencyinfobc.gov.bc.ca|access-date=18 January 2022|date=15 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116000543/https://www.emergencyinfobc.gov.bc.ca/tsunami-advisory-bc-jan15/|url-status=live}}</ref> By the evening, the United States lifted advisories for Alaska, Hawaii, {{wipe|Washington (state)}}, Oregon and portions of California. They remained in effect in California in parts of the Central and North Coast until early the following day.<ref name="nyt_16012022">{{cite news|date=16 January 2022|title=Live Updates: Signs of 'Significant' Tsunami Damage Are Seen in Tonga|newspaper=The New York Times|url=https://www.nytimes.com/live/2022/01/15/us/tsunami-california-tonga/warnings-are-lifted-around-the-pacific-as-tsunami-waves-pass-without-major-damage|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116064308/https://www.nytimes.com/live/2022/01/15/us/tsunami-california-tonga/warnings-are-lifted-around-the-pacific-as-tsunami-waves-pass-without-major-damage|archive-date=16 January 2022}}</ref><ref>{{cite web|date=16 January 2022|title=Public Tsunami Message Number 23|url=https://tsunami.gov/events/PAAQ/2022/01/15/r5qho6/23/WEAK51/WEAK51.txt|url-status=live|archive-url=https://web.archive.org/web/20220118122507/https://www.tsunami.gov/events/PAAQ/2022/01/15/r5qho6/23/WEAK51/WEAK51.txt|archive-date=16 January 2022|access-date=18 January 2022|publisher=National Tsunami Warning Center}}</ref>

No warnings were issued to Peru initially. After the tsunami struck, authorities stopped all maritime activities at the coast. Twenty-two ports along north and central Peru were closed due to tsunami activity.<ref name="Andina"/>

Chile also issued a warning for a "minor tsunami" for most of its coastal area, including the island of Rapa Nui; evacuation was declared for 12 other regions.<ref>{{cite news|title=Chile alerta sobre posible "tsunami menor" tras erupción de volcán en Tonga|trans-title=Chile alerts of a possible "minor tsunami" after volcanic eruption in Tonga|url=https://www.dw.com/es/chile-alerta-sobre-posible-tsunami-menor-tras-erupci%C3%B3n-de-volc%C3%A1n-en-tonga/a-60436791|publisher=Deutsche Welle|date=15 January 2022|access-date=15 January 2022|language=Spanish|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115175314/https://www.dw.com/es/chile-alerta-sobre-posible-tsunami-menor-tras-erupci%C3%B3n-de-volc%C3%A1n-en-tonga/a-60436791|url-status=live}}</ref><ref>{{cite news |title=Chile evacuó las costas de siete regiones por un posible "tsunami menor" tras la erupción del volcán submarino en Tonga|trans-title=Chile evacuated the coasts of seven regions due to a possible "minor tsunami" after the volcanic eruption in Tonga|url=https://www.infobae.com/america/america-latina/2022/01/15/chile-alerto-sobre-un-posible-tsunami-menor-en-la-isla-de-pascua-tras-la-erupcion-del-volcan-submarino-en-tonga/|publisher=Infobae|date=15 January 2022|access-date=15 January 2022|language=Spanish|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115164304/https://www.infobae.com/america/america-latina/2022/01/15/chile-alerto-sobre-un-posible-tsunami-menor-en-la-isla-de-pascua-tras-la-erupcion-del-volcan-submarino-en-tonga/|url-status=live}}</ref> The Hydrographic and Oceanographic Service of the Chilean Navy declared a "State of Precaution" and indicated that there is a possibility of a minor tsunami in the affected regions. Later, coastal evacuation notices were issued in 14 of the 16 regions in Chile. A "Red alert" level was issued to more than {{cvt|6400|km}} of its coastline. The Chilean National Office for Emergency (ONEMI) said that tsunami activity could persist overnight, so those impacted would need to hold onto their emergency supplies and aid.<ref name="Comercio2">{{cite news|date=15 January 2022|title=Tsunami de casi 2 metros llega a la costa de Chile tras la erupción volcánica en Tonga|language=es|trans-title=Tsunami of almost 2 meters reaches the coast of Chile after the volcanic eruption in Tonga|publisher=El Comercio (Peru)|url=https://elcomercio.pe/mundo/latinoamerica/tsunami-en-tonga-en-vivo-chile-evacua-casi-toda-la-costa-por-posible-tsunami-se-esperan-olas-de-viarios-metros-onemi-soha-noticia/|url-status=live |access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050619/https://elcomercio.pe/mundo/latinoamerica/tsunami-en-tonga-en-vivo-chile-evacua-casi-toda-la-costa-por-posible-tsunami-se-esperan-olas-de-viarios-metros-onemi-soha-noticia/|archive-date=16 January 2022}}</ref>

Ecuador issued a warning of maritime disturbance for the [[Earth:Galápagos Islands|Galápagos Islands]].<ref>{{cite news|title=Ecuador con advertencia de tsunami en Galápagos por erupción en Tonga|trans-title=Ecuador with tsunami warning in Galapagos due to eruption in Tonga|url=https://www.swissinfo.ch/spa/tsunami-tonga_ecuador-con-advertencia-de-tsunami-en-gal%C3%A1pagos-por-erupci%C3%B3n-en-tonga/47265266|access-date=16 January 2022 |agency=SwissInfo|date=15 January 2022|language=es|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116115926/https://www.swissinfo.ch/spa/tsunami-tonga_ecuador-con-advertencia-de-tsunami-en-gal%C3%A1pagos-por-erupci%C3%B3n-en-tonga/47265266|url-status=live}}</ref>

Mexico issued tsunami warnings for the coasts of states of Baja California, [[Place:Jalisco|Jalisco]], [[Place:Colima|Colima]], Michoacán, Guerrero, Oaxaca, and Chiapas, urging people to avoid the coasts and entering the sea.<ref>{{cite news|last1=Pachecho|first1=Adriana|title=Tsunami en Tonga provoca actividades inusuales en costas de México|trans-title=Tsunami in Tonga causes unusual activities on the coast of Mexico |url=https://mexico.as.com/mexico/2022/01/15/actualidad/1642287383_640317.html|access-date=17 January 2022|publisher=Diario AS|date=15 January 2022|language=es|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117120905/https://mexico.as.com/mexico/2022/01/15/actualidad/1642287383_640317.html|url-status=live}}</ref>

=== Subsequent days ===
A tsunami advisory was issued to American Samoa following a new eruption at the volcano on 16 January. The advisory was cancelled almost two hours later. A tsunami alert that was issued to Fiji on 15 January was cancelled.<ref>{{cite web|author=Waqairadovu|first=Apenisa|date=16 January 2022|title=Tsunami alert cancelled for Fiji|url=https://www.fbcnews.com.fj/news/tsunami-alert-cancelled-for-fiji/|url-status=live|archive-url=https://web.archive.org/web/20220115213820/https://www.fbcnews.com.fj/news/tsunami-alert-cancelled-for-fiji/|archive-date=15 January 2022|access-date=15 January 2022|publisher=Fiji Broadcasting Corporation}}</ref><ref name="PTWC16A.Sam">{{cite web|title=American Samoa Warn/Adv./Watch #4|url=https://www.tsunami.gov/events/PHEB/2022/01/16/22016001/4/WEZS40/WEZS40.txt|publisher=Pacific Tsunami Warning Center|access-date=17 January 2022|location=Tonga|date=16 January 2022 |archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117010535/https://www.tsunami.gov/events/PHEB/2022/01/16/22016001/4/WEZS40/WEZS40.txt|url-status=live}}</ref>

On 17 January, the Department of Environment in Fiji confirmed that the sulfur dioxide concentration in the atmosphere increased overnight. As previously advised, the department urged the public to cover all household water tanks and stay indoors in the event of [[Earth:Acid rain|acid rain]]. The Ministry of Environment also advised the public not to consume rainwater.<ref>{{cite web|title=Sulphur Dioxide concentration in the atmosphere has increased overnight which could result in acidic rainfall over Fiji|author=Naveel Krishant|url=https://www.fijivillage.com/news/Sulphur-Dioxide-concentration-in-the-atmosphere-has-increased-overnight-which-could-result-in-acidic-rainfall-over-Fiji-458rxf/|date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117084148/https://www.fijivillage.com/news/Sulphur-Dioxide-concentration-in-the-atmosphere-has-increased-overnight-which-could-result-in-acidic-rainfall-over-Fiji-458rxf/ |url-status=live}}</ref><ref>{{cite web|title=Fijians warned of acid rain|author=Kirisitiana Uluwai|url=https://www.fbcnews.com.fj/news/fijians-warned-of-acidic-rain/|date=17 January 2022|publisher=Fiji Broadcasting Corporation|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117084029/https://www.fbcnews.com.fj/news/fijians-warned-of-acidic-rain/|url-status=live}}</ref>

The first aid planes from New Zealand and Australia arrived on Tonga on 20 January, as phone lines were partially restored.<ref>{{cite news|date=20 January 2022|title=Tonga: New Zealand and Australian aid planes to arrive|publisher=BBC News|url=https://www.bbc.com/news/world-asia-60063732|url-status=live|access-date=20 January 2022|archive-url=https://archive.today/20220120044047/https://www.bbc.com/news/world-asia-60063732|archive-date=20 January 2022}}</ref><ref>{{cite news|last1=Menon|first1=Praveen|last2=Needham|first2=Kirsty|last3=Nichols|first3=Michelle|date=20 January 2022|url=https://www.reuters.com/world/tongans-make-contact-with-world-phone-lines-partially-restored-after-tsunami-2022-01-19/|title=Aid flight arrives in Tonga; phone lines partially restored|work=Reuters|url-status=live|access-date=20 January 2022|archive-url=https://archive.today/20220120052330/https://www.reuters.com/world/tongans-make-contact-with-world-phone-lines-partially-restored-after-tsunami-2022-01-19/|archive-date=20 January 2022}}</ref>

On 2 February, after receiving aid shipments, the country went into a [[Social:COVID-19 lockdowns|COVID-19 lockdown]], as two port workers in Nukuʻalofa tested positive.<ref>{{Cite news|date=2 February 2022|title=Tonga enters Covid lockdown after aid delivered|language=en-GB|work=BBC News|url=https://www.bbc.com/news/world-asia-60210867|url-status=live|access-date=5 February 2022|archive-url=https://archive.today/20220205113057/https://www.bbc.com/news/world-asia-60210867|archive-date=5 February 2022}}</ref><ref>{{Cite web|date=1 February 2022|title=Tonga to enter lockdown after port workers test positive for Covid-19|url=https://www.rnz.co.nz/international/pacific-news/460690/tonga-to-enter-lockdown-after-port-workers-test-positive-for-covid-19|url-status=live|archive-url=https://archive.today/20220209081057/https://www.rnz.co.nz/international/pacific-news/460690/tonga-to-enter-lockdown-after-port-workers-test-positive-for-covid-19|archive-date=9 February 2022|access-date=8 February 2022|website=RNZ|language=en-nz}}</ref>

== Impact ==
<!-- Only include countries that have reported deaths and/or injuries -->
{| class="wikitable" style="float: right; text-align: center; font-size:90%;"
|+ Deaths, injuries and missings by country
|-
! Countries !! Deaths !! Injuries !! Missing  !! {{abbr|Ref.|References}}
|-
| Tonga
| 4
| 14
| Several
| <ref name="BBC-3">{{cite news|url=https://www.bbc.com/news/world-asia-60039617|title=Tonga tsunami sparks 'unprecedented disaster', government says|publisher=BBC News|date=18 January 2022|access-date=18 January 2022|archive-date=18 January 2022|archive-url=https://web.archive.org/web/20220118114026/https://www.bbc.com/news/world-asia-60039617|url-status=live}}</ref><ref name="NHK2"/><ref name=":5">{{Cite web|date=23 January 2022|title=Tongan eruption: 85% of the population impacted - government|url=https://www.rnz.co.nz/international/pacific-news/460032/tongan-eruption-85-percent-of-the-population-impacted-government|url-status=live|archive-url=https://ghostarchive.org/archive/20220125140123/https://www.rnz.co.nz/international/pacific-news/460032/tongan-eruption-85-percent-of-the-population-impacted-government|archive-date=25 January 2022|access-date=25 January 2022|website=RNZ|language=en-nz}}</ref><ref name="LatuKaniva">{{cite news |last1=Latu |first1=Kalino |title=Prime Minister defends Deputy's 'no sirens' reply as tsunami death toll rises to four |url=https://www.kanivatonga.nz/2022/01/prime-minister-defends-deputys-no-sirens-reply-as-tsunami-death-toll-rises-to-four/ |access-date=7 April 2022 |work=Kaniva Tonga |date=30 January 2022 |archive-url=https://web.archive.org/web/20220130100337/https://www.kanivatonga.nz/2022/01/prime-minister-defends-deputys-no-sirens-reply-as-tsunami-death-toll-rises-to-four/ |archive-date=30 January 2022}}</ref>
|-
| Peru
| 2
| 0
| 0
| <ref name="Parra"/>
|-
| United States
| 0
| 3
| 0
| <ref name="CBSSF1"/>
|-
| Japan
| 0
| 2
| 0
| <ref name="JAPAN"/>
|-
! Total
! 6
! 19
! Several
!
|}

=== Tonga ===
[[File:NZDF Saint George's Palace January 2022.jpg|thumb|Effects of the eruption in Saint George's Palace|273x273px]]

Little information was made available on the extent of damage and casualties from Tonga due to communication issues involving a damaged undersea cable.<ref name="gbp" /> Video footage showing waves hitting coastal areas in Tonga was reported by Sky News.<ref>{{cite web|title=Tsunami waves hit Tonga after undersea volcano eruption|url=https://news.sky.com/video/tsunami-waves-hit-tonga-after-undersea-volcano-eruption-12516512|date=15 January 2022|publisher=Sky News|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115205045/https://news.sky.com/video/tsunami-waves-hit-tonga-after-undersea-volcano-eruption-12516512|url-status=live}}</ref> Atatā, a small island off the capital city, was reportedly submerged and rescue operations were being carried out. Images confirmed that most of the island have been wiped out; the New Zealand Defence Force described the damages as "catastrophic".<ref>{{cite web|date=19 January 2022|title=Tonga eruption, tsunami: Images appear to show most of Atatā island wiped out |url=https://www.rnz.co.nz/news/world/459845/tonga-eruption-tsunami-images-appear-to-show-most-of-atata-island-wiped-out|url-status=live|archive-url=https://web.archive.org/web/20220120042426/https://www.rnz.co.nz/news/world/459845/tonga-eruption-tsunami-images-appear-to-show-most-of-atata-island-wiped-out|archive-date=20 January 2022|access-date=20 January 2022|website=RNZ}}</ref> There were some reports of residents in Tonga struggling to breathe as a result of the ash.<ref name="1NewsLIVE" /><ref name="NZH1">{{cite news|title=Volcanic eruption: Warning Tonga's air 'toxic'; no reports of deaths following tsunami|url=https://www.nzherald.co.nz/world/volcanic-eruption-warning-tongas-air-toxic-no-reports-of-deaths-following-tsunami/H4XFH6YXPY53XIU53OP2ERHLLY/|access-date=16 January 2022|newspaper=The New Zealand Herald|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050602/https://www.nzherald.co.nz/world/volcanic-eruption-tsunami-first-images-of-devastating-damage-as-tongan-residents-warned-air-toxic-water-contaminated/H4XFH6YXPY53XIU53OP2ERHLLY/|url-status=live}}</ref>

According to a media release by the government via a tweet, all structures were destroyed on Mango Island. Only two buildings remained intact on Fonoifua Island, and Nomuka Island suffered major damage. Twenty-one homes were destroyed and another 35 were seriously damaged on Tongatapu's west coast. Eight homes were demolished and 20 seriously damaged in Nukuʻalofa. ʻEua Island saw the loss of 2 homes and 45 damaged.<ref name="ConsulateKoT" /> An assessment by the United Nations Institute for Training and Research (UNITAR) revealed extensive damage on Atatā Island; at least 72 buildings were affected by the tsunami and the whole island was blanketed by ash.<ref name="NZH3">{{cite news|author1=Radio New Zealand|title=Tonga eruption: Images appear to show most of Atatā island wiped out by tsunami|url=https://www.nzherald.co.nz/world/tonga-eruption-images-appear-to-show-most-of-atata-island-wiped-out-by-tsunami/3HUDP6UWMBHYVLFCQLDYPGNPFQ/|access-date=19 January 2022|newspaper=The New Zealand Herald|date=19 January 2022|archive-date=19 January 2022|archive-url=https://ghostarchive.org/archive/20220119130148/https://www.nzherald.co.nz/world/tonga-eruption-images-appear-to-show-most-of-atata-island-wiped-out-by-tsunami/3HUDP6UWMBHYVLFCQLDYPGNPFQ/|url-status=live}}</ref> Early reports said Atatā Island, which is located off the main Tongan island near Nukuʻalofa, was submerged by the tsunami.<ref name="1NewsLIVE">{{cite news|date=16 January 2022|title=LIVE: NZ official in Tonga says Nuku'alofa 'like moonscape' after ash fall|publisher=1 News|url=https://www.1news.co.nz/2022/01/16/live-tongan-volcanic-eruption-hugely-concerning-ardern/|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050615/https://www.1news.co.nz/2022/01/16/live-nz-official-in-tonga-says-nukualofa-like-moonscape-after-ash-fall/|archive-date=16 January 2022}}</ref> A Facebook post by the Royal Sunset Island Resort on the island said all residents were accounted for and safely evacuated.<ref name="NZH3" /> On Tongatapu, 50 homes were destroyed and 100 more suffered damage.<ref>{{cite web|author1=UN Office for the Coordination of Humanitarian Affairs|date=18 January 2022|title=Tonga: Volcanic Eruption - Flash Update # 3 (As of 18 January 2022)|url=https://reliefweb.int/report/tonga/tonga-volcanic-eruption-flash-update-3-18-january-2022|url-status=live|archive-url=https://ghostarchive.org/archive/20220121030140/https://reliefweb.int/report/tonga/tonga-volcanic-eruption-flash-update-3-18-january-2022|archive-date=21 January 2022|access-date=21 January 2022|publisher=ReliefWeb}}</ref>[[File:NZDF over Tonga January 2022 (cropped).jpg|thumb|Effects of the eruption in Tonga|left|273x273px]]A New Zealand government official in the capital Nukuʻalofa said extensive damage occurred on the waterfront of the city, as it was severely hit by the tsunami.<ref>{{cite web|title=Massive Tonga Volcanic Eruption Caused 'Significant Damage'|url=https://www.ndtv.com/world-news/massive-tonga-volcanic-eruption-caused-significant-damage-2711861|date=17 January 2022|publisher=NDTV|agency=Agence France-Presse |archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116233432/https://www.ndtv.com/world-news/massive-tonga-volcanic-eruption-caused-significant-damage-2711861|url-status=live}}</ref> Acting High Commissioner Peter Lund said that several people were unaccounted for following the eruption and tsunami.<ref name="NHK2">{{cite news|title=NZ official: Some feared missing in Tonga |url=https://www3.nhk.or.jp/nhkworld/en/news/20220116_35/|access-date=16 January 2022|publisher=NHK|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116105726/https://www3.nhk.or.jp/nhkworld/en/news/20220116_35/|url-status=live}}</ref> Tattoo parlour owner Angela Glover, a British resident in Tonga was among the people missing, swept away by the tsunami when it hit Nukuʻalofa.<ref name="Dreaver">{{cite news|author1=Barbara Dreaver|title=UK woman missing after being swept away in Tonga tsunami |url=https://www.1news.co.nz/2022/01/16/uk-woman-missing-after-being-swept-away-in-tonga-tsunami/|access-date=16 January 2022|publisher=1 News|date=16 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117010537/https://www.1news.co.nz/2022/01/16/uk-woman-missing-after-being-swept-away-in-tonga-tsunami/|url-status=live}}</ref> Glover's body was later found.<ref name=":3">{{cite web|date=17 January 2022|title=Tonga tsunami: Body of British woman swept away by wave found|url=https://news.sky.com/story/tonga-tsunami-body-of-british-woman-swept-away-by-wave-found-12518388|url-status=live|access-date=17 January 2022|publisher=Sky News|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117145228/https://news.sky.com/story/tonga-tsunami-body-of-british-woman-swept-away-by-wave-found-12518388}}</ref> Though the extent of the damage in Tonga is still not clear, a blanket of thick ash has contaminated water supplies, cut off communications and prevented surveillance flights, making it difficult for relief efforts to begin.<ref>{{cite web|date=16 January 2022|title=Pacific tsunami threat recedes as volcano ash cloud covers Tonga|url=https://www.theguardian.com/world/2022/jan/16/pacific-tsunami-threat-recedes-as-volcano-ash-cloud-covers-tonga|archive-url=https://web.archive.org/web/20220116153106/https://www.theguardian.com/world/2022/jan/16/pacific-tsunami-threat-recedes-as-volcano-ash-cloud-covers-tonga|archive-date=16 January 2022|access-date=16 January 2022|newspaper=The Guardian}}</ref> Another fatality was confirmed by the Ministry of Foreign Affairs and Trade on 18 January.<ref name="Halpin">{{cite news|author1=James Halpin|title=Tonga tsunami: Two deaths confirmed, MFAT says |url=https://www.stuff.co.nz/world/south-pacific/300498163/tonga-tsunami-two-deaths-confirmed-mfat-says|access-date=18 January 2022|publisher=Stuff NZ|date=18 January 2022|archive-date=18 January 2022|archive-url=https://web.archive.org/web/20220118021146/https://www.stuff.co.nz/world/south-pacific/300498163/tonga-tsunami-two-deaths-confirmed-mfat-says|url-status=live}}</ref> Lund added that there was an initially unconfirmed third death from the tsunami.<ref name="NZH2">{{cite news|date=18 January 2022|title=Tonga death toll: Three dead after eruption and tsunami, UN says|newspaper=The New Zealand Herald|url=https://www.nzherald.co.nz/world/tonga-death-toll-three-dead-after-eruption-and-tsunami-un-says/4CKMDXWY3DJZV5XPRYDRBDRVYM/|access-date=18 January 2022|archive-url=https://web.archive.org/web/20220118021211/https://www.nzherald.co.nz/world/tonga-death-toll-three-dead-after-eruption-and-tsunami-un-says/4CKMDXWY3DJZV5XPRYDRBDRVYM/|archive-date=18 January 2022}}</ref> This third death was identified as a local resident, and the Tongan government has confirmed three deaths were the result of the tsunami.<ref name="BBC-3" /> The Government of Tonga said that the two locals who died were from Mango and Nomuka islands respectively.<ref name="ConsulateKoT">{{cite tweet|link=no|number=1483384039826464768|user=ConsulateKoT|title=FIRST OFFICIAL UPDATE FOLLOWING THE VOLCANIC ERUPTION FROM THE GOVERNMENT OF TONGA Flag of Tonga|author=Consulate of the Kingdom of Tonga|date=18 January 2022|access-date=18 January 2022|archive-url=https://ghostarchive.org/archive/WMIjY|archive-date=28 January 2022}}</ref><ref name="YN">{{cite news|date=20 January 2022|title=Tongan Politician Documents Damage at Beachside Village in Wake of Tsunami|publisher=Yahoo News|url=https://uk.news.yahoo.com/tongan-politician-documents-damage-beachside-125226388.html?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAADJQEYMatquqUnG_-iwUhtngjqxRWVUIVFdMYRS2JRJ8hwVCVhFd713lW6s-vZBvFn9_N2VyGCjaCvBszL93VhRj2_YAle0FLkp5TbOGt2i6J6UVyLn5nOLS4zqknab1f0ajBvhSqU0mi94JSEoa_6HpV91XJtjvdbeGH7Rk4qhf|url-status=live|access-date=20 January 2022|archive-url=https://ghostarchive.org/archive/20220120150110/https://uk.news.yahoo.com/tongan-politician-documents-damage-beachside-125226388.html?guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAADJQEYMatquqUnG_-iwUhtngjqxRWVUIVFdMYRS2JRJ8hwVCVhFd713lW6s-vZBvFn9_N2VyGCjaCvBszL93VhRj2_YAle0FLkp5TbOGt2i6J6UVyLn5nOLS4zqknab1f0ajBvhSqU0mi94JSEoa_6HpV91XJtjvdbeGH7Rk4qhf&_guc_consent_skip=1642693438|archive-date=20 January 2022}}</ref> A fourth fatality was confirmed by 30 January, but information about this victim was not disclosed.<ref name="LatuKaniva" />

[[File:NZDF over Tonga 18 January 2022.jpg|thumb|A P-3K2 Orion aircraft flies over an area of Tonga that shows the heavy ash fall from the recent volcanic eruption within the Tongan Islands.|274x274px]]On 23 January, the Tongan government confirmed that eight people on Nomuka island were injured, with six others sustaining minor injuries.<ref name=":5" />

Photos shared by a resident on the island of Lifuka, northeast of Nukuʻalofa showed minor damage to island communities and a wharf. Damage suggests the island was hit by smaller waves. The islands of ʻUiha and Haʻano also sustained limited damage from the tsunami. Several photographs showed debris left by the tsunami strewn across a road and on grass fields.<ref name="Porter">{{cite news |author1=Nadine Porter|title=Tonga: Photos of tsunami damage shared from outer island, close to volcanic eruption|url=https://www.stuff.co.nz/national/127517035/tonga-photos-of-tsunami-damage-shared-from-outer-island-close-to-volcanic-eruption|date=17 January 2022|publisher=Stuff NZ|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117041023/https://www.stuff.co.nz/national/127517035/tonga-photos-of-tsunami-damage-shared-from-outer-island-close-to-volcanic-eruption|url-status=live}}</ref> Owners of the Haʻatafu Beach Resort wrote on Facebook that their beach resort, located at the northern tip of the island of Tongatapu, was completely destroyed. The employees were able to escape. They added that the whole western coastline of the island and Kanokupolu village were destroyed.<ref name="CNA">{{cite news |agency=Reuters|title=Drinking water, ash big concern as Tonga volcanic eruption causes 'significant damage'|url=https://www.channelnewsasia.com/world/australia-new-zealand-step-efforts-aid-tsunami-hit-tonga-2439831|access-date=17 January 2022|publisher=Channel News Asia|date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117070954/https://www.channelnewsasia.com/world/australia-new-zealand-step-efforts-aid-tsunami-hit-tonga-2439831|url-status=live}}</ref> The United Nations Office for the Coordination of Humanitarian Affairs stated that there was concern for two low-lying islands in the Haʻapai group, Fonoi and Mango, as a distress beacon had been detected on one of the islands (Fonoi has a population of 69 people, while Mango has 36 residents).<ref>{{cite web|date=18 January 2022|title=Distress signal prompts UN concern after Tonga volcanic eruption |url=https://www.rnz.co.nz/news/world/459724/distress-signal-prompts-un-concern-after-tonga-volcanic-eruption|access-date=17 January 2022|publisher=Radio New Zealand|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117212346/https://www.rnz.co.nz/news/world/459724/distress-signal-prompts-un-concern-after-tonga-volcanic-eruption|url-status=live}}</ref> A surveillance flight confirmed "substantial property damage" on the two low-lying islands; the Tongan government later confirmed that all homes on Mango Island were destroyed.<ref name=":4">{{cite web|date=18 January 2022|title=Reports of 'significant damage' in Tonga after eruption, tsunami|url=https://www.aljazeera.com/news/2022/1/18/reports-of-significant-damage-in-tonga-after-eruption-tsunami|url-status=live|archive-url=https://web.archive.org/web/20220118045515/https://www.aljazeera.com/news/2022/1/18/reports-of-significant-damage-in-tonga-after-eruption-tsunami|archive-date=18 January 2022|website=aljazeera.com}}</ref><ref>{{cite web|date=18 January 2022|title=Tongan government confirms all homes on Mango destroyed, fears death toll to rise|url=https://www.rnz.co.nz/news/world/459784/tongan-government-confirms-all-homes-on-mango-destroyed-fears-death-toll-to-rise|url-status=live|archive-url=https://archive.today/20220119140749/https://www.rnz.co.nz/news/world/459784/tongan-government-confirms-all-homes-on-mango-destroyed-fears-death-toll-to-rise|archive-date=19 January 2022|access-date=18 January 2022|publisher=RNZ}}</ref>

Southern Cross Cable reported that the eruption may have broken the Tonga Cable System, which connects Tonga to Southern Cross's trans-Pacific cable in Fiji.<ref>{{cite web|date=16 January 2022 |title=Tonga subsea communications cable 'may be broken after all', says Southern Cross|url=https://www.stuff.co.nz/business/127512800/tonga-subsea-communications-cable-may-be-broken-after-all-says-southern-cross|access-date=16 January 2022|publisher=Stuff|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116110005/https://www.stuff.co.nz/business/127512800/tonga-subsea-communications-cable-may-be-broken-after-all-says-southern-cross|url-status=live}}</ref> Southern Cross cited a fault in the international cable {{cvt|37|km}} from Nukuʻalofa, and a further fault in a domestic cable {{cvt|47|km}} from Nukuʻalofa.<ref>{{cite web|last=Duckett|first=Chris|title=Volcanic eruption takes out Tonga cables|url=https://www.zdnet.com/article/volcanic-eruption-takes-out-tonga-cables/|date=17 January 2022|website=ZDNet|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117072805/https://www.zdnet.com/article/volcanic-eruption-takes-out-tonga-cables/ |url-status=live}}</ref> New Zealand prime minister Jacinda Ardern had earlier stated that an [[Engineering:Submarine communications cable|undersea cable]] serving Tonga was affected, probably due to power cuts, and authorities were urgently attempting to restore communications.<ref name="RNŹ" /> The chair of the Tonga Cable System, Samiuela Fonua, stated that repair crews would not be cleared to access the site of the faults before volcanic activity ceased at Hunga Tonga; with additional preparation time necessary for the repairs, internet services could be unavailable for over two weeks after the eruption.<ref>{{cite news|last=Tahlea Aualiitia|first=Edwina Seselja|date=17 January 2022|title=Tonga's only undersea communication cable could be down for weeks|work=ABC News|url=https://www.abc.net.au/news/2022-01-18/when-will-tongas-undersea-cable-be-repaired-/100760998|url-status=live|access-date=17 January 2022|archive-url=https://web.archive.org/web/20220118004046/https://www.abc.net.au/news/2022-01-18/when-will-tongas-undersea-cable-be-repaired-/100760998|archive-date=18 January 2022}}</ref> Limited satellite connectivity was established on 21 January, mobile phone provider [[Company:Digicel|Digicel]] established a 2G cell network on Tongatapu using a satellite dish from the University of the South Pacific.<ref name=":6">{{Cite news|last1=Scarr|first1=Simon|last2=Foo|first2=Wen|last3=Kawoosa|first3=Vijdan Mohammad|last4=Katakam|first4=Anand|last5=Bhandari|first5=Aditi|date=28 January 2022|title=How engineers will reconnect Tonga's broken internet cable|language=en|work=Reuters|url=https://graphics.reuters.com/TONGA-VOLCANO/znpnejbjovl/|access-date=30 January 2022|archive-url=https://ghostarchive.org/archive/20220130220106/https://graphics.reuters.com/TONGA-VOLCANO/znpnejbjovl/|archive-date=30 January 2022|url-status=live}}</ref><ref>{{Cite news|last=Wakefield|first=Jane|date=24 January 2022|title=How will Tonga's broken internet cable be mended?|language=en-GB|work=BBC News|url=https://www.bbc.com/news/technology-60069066|url-status=live|access-date=30 January 2022|archive-url=https://archive.today/20220124040247/https://www.bbc.com/news/technology-60069066|archive-date=24 January 2022}}</ref> Reuters reported that a specialist cable repair ship would arrive at the Tongan archipelago on 30 January.<ref name=":6" /> On 4 February, the Associated Press reported that Fonua stated that repair crews would need to replace {{Convert|87|km|mi}} of cable, and that he hoped to have it restored the following week.<ref>{{Cite web|last1=Rising|first1=David|last2=Perry|first2=Nick|date=4 February 2022|title=Aid to volcano-hit Tonga brings 1st COVID outbreak, lockdown|url=https://abcnews.go.com/Health/wireStory/aid-reaching-disaster-hit-tonga-brings-virus-outbreak-82659325|url-status=live|archive-url=https://ghostarchive.org/archive/20220210040227/https://abcnews.go.com/Health/wireStory/aid-reaching-disaster-hit-tonga-brings-virus-outbreak-82659325|archive-date=10 February 2022|access-date=10 February 2022|website=ABC News|publisher=Associated Press|language=en}}</ref> On 8 February, the ''Matangi Tonga'' website reported that more breaks were suspected within the cable, delaying the cable's restoration to 20 February.<ref>{{Cite web|last=Folau|first=Linny|date=8 February 2022|title=More breaks on Tonga cable suspected on Fiji end|url=https://matangitonga.to/2022/02/08/more-breaks-tonga-cable-suspected-fiji-end|url-access=subscription|url-status=live|archive-url=https://web.archive.org/web/20220209185357/https://matangitonga.to/2022/02/08/more-breaks-tonga-cable-suspected-fiji-end|archive-date=9 February 2022|access-date=12 February 2022|website=Matangitonga|language=en}}</ref><ref>{{Cite web|last=Spence|first=Rebecca|date=9 February 2022|title=Additional Breaks To Tonga Cable Push Repair Date Back|url=https://subtelforum.com/additional-breaks-to-tonga-cable-push-repair-date-back/|url-status=live|archive-url=https://web.archive.org/web/20220212111030/https://subtelforum.com/additional-breaks-to-tonga-cable-push-repair-date-back/|archive-date=12 February 2022|access-date=12 February 2022|website=subtelforum|language=en-US}}</ref> Agence France-Presse followed up in a report on 15 February, stating that the cable was torn into multiple pieces and that a {{Convert|55|km|mi|adj=on}} section of cable had been lost. The report also stated that separate sections of cable had been moved {{Convert|5|km|mi}} and buried under {{Convert|30|cm|in}} of silt.<ref>{{Cite web|last=Agence France-Presse|date=2022-02-15|title=Volcano Damage to Tonga Undersea Cable Worse Than Expected|url=https://www.voanews.com/a/volcano-damage-to-tonga-undersea-cable-worse-than-expected-/6443686.html|url-status=live|archive-url=https://ghostarchive.org/archive/20220220020224/https://www.voanews.com/a/volcano-damage-to-tonga-undersea-cable-worse-than-expected-/6443686.html|archive-date=20 February 2022|access-date=2022-02-19|website=Voice of America|language=en}}</ref> The cable being cut repeatedly and moved long distances is consistent with a [[Physics:Turbidity current|turbidity current]] damaging it, similar to the 1929 Grand Banks earthquake.<ref>{{Cite web |last=Ulrich Speidel |date=2022-03-01 |title=When volcanoes go bang, submarine cables do … what? |url=https://blog.apnic.net/2022/03/01/when-volcanoes-go-bang-submarine-cables-do-what/ |url-status=live |archive-url=https://ghostarchive.org/archive/20220303020351/https://blog.apnic.net/2022/03/01/when-volcanoes-go-bang-submarine-cables-do-what/ |archive-date=3 March 2022 |access-date=2022-03-03 |website=APNIC Blog |language=en-US }}</ref> The cable connection to Tongatapu was repaired on 22 February.<ref>{{Cite web|date=2022-02-22|title=Tonga volcano: Internet restored five weeks after eruption|url=https://www.bbc.co.uk/news/world-asia-60458303|url-status=live|archive-url=https://archive.today/20220223012117/https://www.bbc.com/news/world-asia-60458303|archive-date=23 February 2022|access-date=2022-02-22|website=BBC News|language=en}}</ref>

Severe damage on the west coast of Tongatapu was confirmed by the New Zealand High Commission in Tonga on 17 January.<ref name="RNZ4">{{cite news|title=Significant damage on Tonga's west coast – NZ High Commission|url=https://www.rnz.co.nz/news/national/459717/significant-damage-on-tonga-s-west-coast-nz-high-commission|access-date=17 January 2022|publisher=Radio New Zealand|date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117084012/https://www.rnz.co.nz/news/national/459717/significant-damage-on-tonga-s-west-coast-nz-high-commission |url-status=live}}</ref> Surveillance flights by the Australian Defence Forces reported extensive damage along the west coast.<ref>{{cite web|author=Helen Regan|title=Here's what we know about the massive Pacific eruption and tsunami |url=https://www.cnn.com/2022/01/17/asia/tonga-volcanic-eruption-tsunami-explainer-intl-hnk/index.html|access-date=18 January 2022|website=CNN|date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117144741/https://www.cnn.com/2022/01/17/asia/tonga-volcanic-eruption-tsunami-explainer-intl-hnk/index.html|url-status=live}}</ref> The shores of Nukuʻalofa had substantial damage as debris and rocks were deposited inland by the tsunami waves, according to an early report from the UN Office for the Coordination of Humanitarian Affairs (OCHA). A {{cvt|2|cm}} layer of volcanic ash blanketed the capital Nukuʻalofa.<ref name="OCHA1">{{cite web|author1=UN Office for the Coordination of Humanitarian Affairs|date=17 January 2022|title=Tonga: Volcanic Eruption – Flash Update (As of 17 January 2022)|url=https://reliefweb.int/report/tonga/tonga-volcanic-eruption-flash-update-17-january-2022|archive-url=https://web.archive.org/web/20220117120901/https://reliefweb.int/report/tonga/tonga-volcanic-eruption-flash-update-17-january-2022|archive-date=17 January 2022|access-date=17 January 2022|publisher=ReliefWeb}}</ref>

Satellite images of Nomuka island showed that nearly a fifth of the structures had been damaged, with more than 40 buildings covered in ash.<ref>{{cite web|date=18 January 2022|title=MFAT confirms two deaths after Tonga tsunami|url=https://www.rnz.co.nz/news/world/459760/mfat-confirms-two-deaths-after-tonga-tsunami|access-date=18 January 2022|publisher=RNZ|archive-date=18 January 2022|archive-url=https://web.archive.org/web/20220118052450/https://www.rnz.co.nz/news/world/459760/mfat-confirms-two-deaths-after-tonga-tsunami|url-status=live}}</ref> The Fuaʻamotu International Airport was covered with ash and dirt.<ref>{{cite web|date=18 January 2022|title=Tonga volcano: first pictures after eruption show islands blanketed in ash, as two deaths confirmed|url=https://www.theguardian.com/world/2022/jan/18/tonga-volcano-first-pictures-after-eruption-show-islands-blanketed-in-ash-as-two-deaths-confirmed|archive-url=https://web.archive.org/web/20220118030926/https://www.theguardian.com/world/2022/jan/18/tonga-volcano-first-pictures-after-eruption-show-islands-blanketed-in-ash-as-two-deaths-confirmed|archive-date=18 January 2022|access-date=18 January 2022|newspaper=The Guardian}}</ref> There were also reports of water damage in the district of Nukuʻalofa.<ref>{{Cite web|title=Before and after: Satellite images reveal extent of damage in Tonga|url=https://www.nzherald.co.nz/nz/tonga-eruption-satellite-images-reveal-extent-of-damage-in-pacific-nation/H64XHDHH2BMKI5GABODK3V5HKI/|archive-url=https://web.archive.org/web/20220118052216/https://www.nzherald.co.nz/nz/tonga-eruption-satellite-images-reveal-extent-of-damage-in-pacific-nation/H64XHDHH2BMKI5GABODK3V5HKI/|archive-date=18 January 2022|access-date=18 January 2022|newspaper=The New Zealand Herald}}</ref> The Tongan navy that was dispatched to Haʻapai islands reported significant damage, where a tsunami estimated to be between {{cvt|5|–|10|m}} in height traveled as far as {{cvt|500|m}} inland.<ref name=":4" />

The [[Organization:World Bank|World Bank]]'s damage assessment report for the Tongan Government stated that the eruption and tsunami caused damage estimated at US $90.4 million; ~18.5% of Tonga's total [[Finance:Gross domestic product|gross domestic product]] (GDP). The [[Organization:Global Facility for Disaster Reduction and Recovery|Global Facility for Disaster Reduction and Recovery]] reported that 600 buildings including 300 homes were damaged or destroyed by the tsunami. The damage was estimated at US $43.7 million. At least 85% of Tonga's agricultural industry was severely affected by damage to crops and fisheries, estimating at US $20.9 million. Damage to roads, bridges, ports and submarine cables were an estimated US $20.9 million. The clean-up cost is also an additional US $5 million.<ref name="2022/058/EAP">{{cite web|date=14 February 2022|title=Tonga Volcanic Eruption and Tsunami: World Bank Disaster Assessment Report Estimates Damages at US$90M|url=https://www.worldbank.org/en/news/press-release/2022/02/14/tonga-volcanic-eruption-and-tsunami-world-bank-disaster-assessment-report-estimates-damages-at-us-90m|url-status=live|archive-url=https://ghostarchive.org/archive/20220215000227/https://www.worldbank.org/en/news/press-release/2022/02/14/tonga-volcanic-eruption-and-tsunami-world-bank-disaster-assessment-report-estimates-damages-at-us-90m|archive-date=15 February 2022|access-date=14 February 2022|publisher=[[Organization:World Bank|World Bank]]|location=Suva, Fiji}}</ref>

=== Elsewhere ===
{{multiple image
| width             = 220
| direction         = vertical
| image1            = Ash distribution from Hunga Tonga over Australia.jpg
| caption1          = Volcanic ash from the eruption over Queensland, Australia on 17 January 2022
| image2            = ISS-66 Atmospheric plume from 2022 Hunga Tonga eruption.jpg
| caption2          = The atmospheric plume from the volcanic eruption in the Pacific nation of Tonga is pictured from the [[Astronomy:International Space Station|International Space Station]] as it orbited {{cvt|433|km}} above the Pacific Ocean northwest of [[Place:Auckland|Auckland]], New Zealand.
| image3            = PRESIDENTE DE LA REPUBLICA Y VICE MINISTRO DE RECURSOS PARA LA DEFENSA INSPECCIONAN PLAYA DE ANCON - 51841282417.jpg
| caption3          = President Pedro Castillo and government officials at a beach in Peru after an oil spill caused by the tsunami.
}}

In Fiji, the eruption triggered waves in Vanua Balavu, Kadavu, Gau, and Taveuni. In the village of Moce, Lau Islands, the tsunami severely damaged some homes on the beaches and debris was strewn across the village and boats were dragged inland.<ref name="Waqairadovu">{{cite news|author1=Apenisa Waqairadovu|title=Storm surges damage homes|url=https://www.fbcnews.com.fj/news/storm-surges-leave-damage-on-maritime-islands/|access-date=17 January 2022|publisher=FBC News|date=16 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117084012/https://www.fbcnews.com.fj/news/storm-surges-leave-damage-on-maritime-islands/|url-status=live}}</ref><ref>{{cite web|last=Kumar|first=Rashika|title=Ono-i-Lau, Vatoa, parts of Kadavu, Rewa Delta and the North have been affected by the Tongan volcanic eruption|url=https://www.fijivillage.com/news/Ono-i-Lau-Vatoa-parts-of-Kadavu-Rewa-Delta-and-the-North-have-been-affected-by-the-Tongan-volcanic-eruption--fx5r48/|url-status=live|archive-url=https://web.archive.org/web/20220117084403/https://www.fijivillage.com/news/Ono-i-Lau-Vatoa-parts-of-Kadavu-Rewa-Delta-and-the-North-have-been-affected-by-the-Tongan-volcanic-eruption--fx5r48/|archive-date=17 January 2022|access-date=17 January 2022|website=fijivillage.com}}</ref> There was sizeable damage to schools, infrastructure as well as fishing boats in the islands.<ref>{{cite web|last=Movono|first=Lice|date=20 January 2022|title=Fiji rebuilds after tsunami damage|url=https://www.rnz.co.nz/international/pacific-news/459874/fiji-rebuilds-after-tsunami-damage|url-status=live|archive-url=https://web.archive.org/web/20220120112437/https://www.rnz.co.nz/international/pacific-news/459874/fiji-rebuilds-after-tsunami-damage|archive-date=20 January 2022|access-date=20 January 2022|publisher=RNZ}}</ref>

Two people in Itoman, Okinawa, and Amami City, Japan suffered falls during the evacuations.<ref name="JAPAN">{{cite web |title=トンガ諸島の火山噴火に伴う津波による被害及び 消防機関等の対応状況(第６報)(これは速報であり、数値等は今後も変わることがある。) |trans-title=Damage caused by the tsunami caused by the volcanic eruption of the Tonga Islands and Response status of fire departments (6th report) (This is a preliminary report, and the figures may change in the future.) |url=https://www.fdma.go.jp/disaster/info/items/20210116tunamikeihou6.pdf |url-status=live |archive-url=https://ghostarchive.org/archive/20220324040335/https://www.fdma.go.jp/disaster/info/items/20210116tunamikeihou6.pdf |archive-date=24 March 2022 |access-date=25 March 2022 |website=www.fdma.go.jp |publisher=Fire and Disaster Management Agency |language=ja }}</ref> A number of fishing boats in Kōchi and Mie prefectures capsized or sank. A total of 30 fishing vessels were lost. In Muroto, five small boats sank and another five were lost. A small ship capsized and sank in Owase. The tsunami also damaged fishing nets on the coast of Tokushima Prefecture.<ref name="NHK3">{{cite news|date=16 January 2022|title=高知県 徳島県 三重県で漁船沈没や転覆相次ぐ|language=ja|trans-title=Kochi prefecture Tokushima prefecture Mie prefecture, fishing boats sank and capsized one after another.|publisher=NHK|url=https://www3.nhk.or.jp/news/html/20220116/k10013433281000.html|url-status=live|access-date=16 January 2022|archive-url=https://archive.today/20220116130029/https://www3.nhk.or.jp/news/html/20220116/k10013433281000.html|archive-date=16 January 2022}}</ref> Land, sea and air transportation was affected; 27 domestic flights operated by Japan Air Lines were cancelled due to the warnings.<ref name="Kyodo1">{{cite news|date=16 January 2022 |title=Japan sees tsunami but no major damage after Tonga volcano eruption|publisher=Kyodo News|url=https://english.kyodonews.net/news/2022/01/cf82db4e9f53-urgent-japans-pacific-coast-hit-by-tsunami-after-tonga-eruption.html|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116003512/https://english.kyodonews.net/news/2022/01/cf82db4e9f53-urgent-japans-pacific-coast-hit-by-tsunami-after-tonga-eruption.html|archive-date=16 January 2022}}</ref>

The tsunami caused serious material damage to a tour operator at Kailua-Kona, Hawaii, where 80% of its inventory and gear was lost. Major damage to retail products and the business office totaled at least US$75,000.<ref name="Yee">{{cite news|author1=Chelsee Yee|title='This loss will hurt': Hawaii business sees major damage after eruption in Tonga sends tsunami waves |url=https://www.khon2.com/local-news/this-loss-will-hurt-hawaii-business-sees-major-damage-after-eruption-in-tonga-sends-tsunami-waves/|access-date=17 January 2022|publisher=KHON-TV|date=17 January 2022 |archive-date=18 January 2022|archive-url=https://web.archive.org/web/20220118004018/https://www.khon2.com/local-news/this-loss-will-hurt-hawaii-business-sees-major-damage-after-eruption-in-tonga-sends-tsunami-waves/|url-status=live}}</ref> Beaches and piers were flooded by the surging waves in the city. Canoes belonging to several clubs were damaged and strewn across the beach or on rock walls due to the waves. Boats were dumped inland or on piers after the waves retreated.<ref name="HNN">{{cite news|last=HNN Staff|date=16 January 2022|title=Clean-up efforts underway following tsunami surge triggered by Tonga eruption|publisher=Hawaii News Now|url=https://www.hawaiinewsnow.com/2022/01/16/clean-up-efforts-underway-following-tsunami-surge-triggered-by-tonga-eruption/|url-status=live|access-date=17 January 2022|archive-url=https://web.archive.org/web/20220116194121/https://www.hawaiinewsnow.com/2022/01/16/clean-up-efforts-underway-following-tsunami-surge-triggered-by-tonga-eruption/|archive-date=16 January 2022}}</ref>

Two women in northern Peru drowned in the swell when {{cvt|2|m}} waves hit Naylamp beach, Lambayeque, dragging a truck into the sea. The driver escaped.<ref name="NZHerald2Peru">{{cite news|title=Tonga eruption, tsunami: Two people in Peru drown as surge hits |newspaper=NZ Herald |date=16 January 2022 |url=https://www.nzherald.co.nz/world/tonga-eruption-tsunami-two-people-in-peru-drown-as-surge-hits/MX2R5NZQXI6ZU4DNNVSSRJ3ZKY/}}</ref><ref name="Parra">{{cite news|author1=Nicolás Parra|date=16 January 2022|title=Reportan dos muertes y daños por tsunami en Perú: país no emitió alerta|language=es|trans-title=Two deaths and tsunami damage reported in Peru: country did not issue an alert|publisher=Radio Bío-Bío|url=https://www.biobiochile.cl/noticias/internacional/america-latina/2022/01/15/reportan-dos-muertes-y-danos-por-tsunami-en-peru-pais-no-emitio-alerta.shtml|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116030122/https://www.biobiochile.cl/noticias/internacional/america-latina/2022/01/15/reportan-dos-muertes-y-danos-por-tsunami-en-peru-pais-no-emitio-alerta.shtml|archive-date=16 January 2022}}</ref> Twenty-two ports along northern and central Peru were closed due to the tsunami. Substantial material damage was inflicted on coastal businesses and the beach areas. Videos showed the tsunami flooding the streets.<ref name="Andina">{{cite news|date=16 January 2022|title=Disponen el cierre de 22 puertos ante oleajes anómalos por erupción volcánica|language=es|trans-title=They order the closure of 22 ports due to abnormal waves due to a volcanic eruption|publisher=Andina|url=https://andina.pe/agencia/noticia-disponen-cierre-22-puertos-ante-oleajes-anomalos-erupcion-volcanica-877201.aspx|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116124131/https://andina.pe/agencia/noticia-disponen-cierre-22-puertos-ante-oleajes-anomalos-erupcion-volcanica-877201.aspx |archive-date=16 January 2022}}</ref> Restaurants and boats in Lagunillas beach and San Andrés District were damaged by waves. Many beachgoers were evacuated to safety while businesses closed.<ref name="Gestión">{{cite news|date=15 January 2022|title=Paracas: salida del mar afectó el muelle y dañó locales y viviendas de la zonaParacas: salida del mar afectó el muelle y dañó locales y viviendas de la zona|language=es|trans-title=Paracas: outflow of the sea affected the pier and damaged premises and homes in the area|publisher=Gestión |url=https://gestion.pe/peru/erupcion-tonga-tsunami-paracas-salida-del-mar-afecto-el-muelle-y-dano-locales-y-viviendas-videos-nndc-noticia/|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050614/https://gestion.pe/peru/erupcion-tonga-tsunami-paracas-salida-del-mar-afecto-el-muelle-y-dano-locales-y-viviendas-videos-nndc-noticia/|archive-date=16 January 2022}}</ref> Damage to piers and some homes occurred in the capital, [[Place:Lima|Lima]]. In some areas, boat owners dragged their boats onto shore to prevent the waves from damaging them.<ref name="TT1">{{cite news |date=16 January 2022|title=ONEMI confirmó solo daños "menores" producto del Tsunami y destacó el comportamiento "ejemplar" de las personas|language=es|trans-title=ONEMI confirmed only "minor" damage caused by the Tsunami and highlighted the "exemplary" behavior of people"|newspaper=The Times|url=https://thetimes.cl/contenido/2498/onemi-confirmo-solo-danos-menores-producto-del-tsunami-y-destaco-el-comportamien |url-status=live|access-date=17 January 2022|archive-url=https://web.archive.org/web/20220117010643/https://thetimes.cl/contenido/2498/onemi-confirmo-solo-danos-menores-producto-del-tsunami-y-destaco-el-comportamien|archive-date=17 January 2022}}</ref><ref name="Comercio">{{cite news|date=15 January 2022|title=Paracas: mar se salió y dañó el muelle, locales y viviendas {{!}} VIDEOS|language=es|trans-title=Paracas: sea came out and damaged the pier, premises and homes {{!}} VIDEOS|work=El Comercio (Peru)|url=https://elcomercio.pe/peru/ica/erupcion-tonga-tsunami-paracas-mar-se-salio-y-dano-el-muelle-locales-y-viviendas-de-la-zona-san-andres-playa-lagunilla-videos-nndc-noticia/|url-status=live|access-date=16 January 2022|archive-url=https://web.archive.org/web/20220117233110/https://elcomercio.pe/peru/ica/erupcion-tonga-tsunami-paracas-mar-se-salio-y-dano-el-muelle-locales-y-viviendas-de-la-zona-san-andres-playa-lagunilla-videos-nndc-noticia/|archive-date=16 January 2022}}</ref> The Peruvian Civil Defense Institute said on 17 January that an oil spill occurred at the La Pampilla refinery. The spill was caused by tsunami waves moving a ship while transporting oil onto the refinery.<ref name="CNA1">{{cite news|date=18 January 2022|title=Waves from eruption in Tonga cause oil spill in Peru|publisher=Channel News Asia|url=https://www.channelnewsasia.com/world/tonga-volcano-eruption-oil-spill-peru-2442026|access-date=19 January 2022|archive-url=https://web.archive.org/web/20220119014050/https://www.channelnewsasia.com/world/tonga-volcano-eruption-oil-spill-peru-2442026|archive-date=19 January 2022|url-status=live}}</ref> The oil spill affected some {{cvt|1187|km2}} of sea and {{cvt|1740|km2}} of beach-coastal strip, and more than {{cvt|500|ha}} of protected natural areas in Peru.<ref>{{cite web|date=20 January 2022|title=Comunicado del Organismo de Evaluación y Fiscalización Ambiental (OEFA)|trans-title=Statement from the Agency for Environmental Assessment and Enforcement (OEFA)|url=https://www.gob.pe/institucion/oefa/noticias/577638-comunicado|url-status=live|archive-url=https://archive.today/20220122033435/https://www.gob.pe/institucion/oefa/noticias/577638-comunicado|archive-date=22 January 2022|access-date=21 January 2022|website=Gob.pe (Plataforma digital única del Estado Peruano)|language=es}}</ref>

Despite the warnings from officials, some residents in California strayed too close to the sea, and they were swept away by strong surges, such as the situation at San Gregorio, California, where four fishermen were swept out to sea by the tsunami. Two men were injured and received medical treatment, while another two were rescued unhurt.<ref name="Oetting">{{cite news|author1=Jerimiah Oetting |title=Here are the impacts of the tsunami along the Monterey Bay|url=https://www.kazu.org/kazu-news/2022-01-15/here-are-the-impacts-of-the-tsunami-along-the-monterey-bay|access-date=16 January 2022 |publisher=KAZU|date=15 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050607/https://www.kazu.org/kazu-news/2022-01-15/here-are-the-impacts-of-the-tsunami-along-the-monterey-bay|url-status=live}}</ref> A woman was rescued and treated by medical workers at China Beach, San Francisco.<ref name="CBSSF1">{{cite news|title=Rescue Crews Busy On San Francisco Bay Area Beaches During Tsunami Surge|url=https://sanfrancisco.cbslocal.com/2022/01/16/rescues-crews-busy-on-san-francisco-bay-area-beaches-during-tsunami-surge/|access-date=16 January 2022|work=KPIX-TV |date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116144814/https://sanfrancisco.cbslocal.com/2022/01/16/rescues-crews-busy-on-san-francisco-bay-area-beaches-during-tsunami-surge/|url-status=live}}</ref> {{wipe|San Francisco}} firefighters and the U.S. Coast Guard rescued three surfers.<ref name="mercurynews_15012022" /> The tsunami caused extensive damage at Santa Cruz harbor in Santa Cruz, California. Electrical systems, pilings, restrooms and showers were damaged and repair costs were estimated at US$6.5 million.<ref>{{cite news|last=Stuart|first=Ryan|date=18 January 2022|title=Santa Cruz Harbor sees more than $6 million in tsunami damage|newspaper=Santa Cruz Sentinel|url=https://www.santacruzsentinel.com/2022/01/18/santa-cruz-harbor-sees-more-than-6-million-in-tsunami-damage|archive-url=https://archive.today/20220123011457/https://www.santacruzsentinel.com/2022/01/18/santa-cruz-harbor-sees-more-than-6-million-in-tsunami-damage/|archive-date=23 January 2022|access-date=22 January 2022|url-status=live}}</ref>

Minor material damage occurred on the coast of Penco, and six people were trapped in Coliumo (near Tomé), in Chile's [[Place:Biobío Region|Biobío Region]].<ref name="Coliumo2022">{{cite web|last1=Rojas|first1=T|last2=Gándara|first2=M.|last3=Osses|first3=S.|date=15 January 2022|title=Pese a todas las advertencias: familia se fue a tomar fotos a roquerío de Coliumo y quedó atrapada|trans-title=Despite all the warnings: family went to take photos at the Coliumo rocky area and was trapped|url=https://www.biobiochile.cl/noticias/nacional/region-del-bio-bio/2022/01/15/pese-a-todas-las-advertencias-familia-se-fue-a-tomar-fotos-a-roquerio-de-coliumo-y-quedo-atrapada.shtml|url-status=live|archive-url=https://archive.today/20220124154927/https://www.biobiochile.cl/noticias/nacional/region-del-bio-bio/2022/01/15/pese-a-todas-las-advertencias-familia-se-fue-a-tomar-fotos-a-roquerio-de-coliumo-y-quedo-atrapada.shtml|archive-date=24 January 2022|publisher=biobiochile.cl|language=es|access-date=24 January 2022}}</ref> No casualties were reported due to the evacuations. A State of Precaution was still in place in [[Place:Atacama Region|Atacama]], Coquimbo, [[Place:Ñuble Region|Ñuble]] and Biobío as of 16 January 2022.<ref>{{Cite web|last=CA18|date=16 January 2022|title=Chile ends tsunami warning after eruption of submarine volcano in Tonga|url=https://california18.com/chile-ends-tsunami-warning-after-eruption-of-submarine-volcano-in-tonga/2720332022/|url-status=live|archive-url=https://archive.today/20220202232749/https://california18.com/chile-ends-tsunami-warning-after-eruption-of-submarine-volcano-in-tonga/2720332022/|archive-date=2 February 2022|access-date=2 February 2022|website=California18|language=en-US}}</ref>

Flights to Tonga and in the surrounding region were disrupted by lingering volcanic ash. Air New Zealand stated that a repatriation flight to Tonga that was originally scheduled for 20 January was postponed indefinitely, and [[Biology:Fiji Airways|Fiji Airways]] announced that all flights to Tonga were postponed and several services to Australia could face delays and longer flight times.<ref>{{cite web|date=17 January 2022 |title=Tonga volcano eruption: Air New Zealand postpones repatriation flight due to ash clouds|url=https://www.rnz.co.nz/international/pacific-news/459696/tonga-volcano-eruption-air-new-zealand-postpones-repatriation-flight-due-to-ash-clouds|access-date=17 January 2022|publisher=RNZ|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117042631/https://www.rnz.co.nz/international/pacific-news/459696/tonga-volcano-eruption-air-new-zealand-postpones-repatriation-flight-due-to-ash-clouds|url-status=live}}</ref> An Aircalin flight from [[Place:Tokyo|Tokyo]] to [[Place:Nouméa|Nouméa]] was diverted to Brisbane to avoid volcanic ash, with a subsequent flight from Nouméa to [[Place:Sydney|Sydney]] placed on hold.<ref>{{cite web|date=17 January 2022|title=In brief: News from around the Pacific |url=https://www.rnz.co.nz/international/pacific-news/459681/in-brief-news-from-around-the-pacific|access-date=17 January 2022|publisher=RNZ|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117070944/https://www.rnz.co.nz/international/pacific-news/459681/in-brief-news-from-around-the-pacific|url-status=live}}</ref> The ash cloud reached Queensland on 17 January, creating an "eerie, spectacular, and incredible" sunrise.<ref>{{cite news|date=17 January 2022|title=Stunning skies and a golden orb light up Queensland after Tongan volcano|publisher=ABC News |url=https://www.abc.net.au/news/2022-01-17/volcanic-ash-creates-eerie-sunrise-in-queensland/100760792|access-date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117084016/https://www.abc.net.au/news/2022-01-17/volcanic-ash-creates-eerie-sunrise-in-queensland/100760792|url-status=live}}</ref> In July, it reached [[Earth:Antarctica|Antarctica]], causing "stunning" pink and purple skyscapes.<ref>{{cite web |last1=Thomson |first1=Jess |title=Pink Skies Seen Over Antarctica May Be Explained by Tonga Volcano Eruption |url=https://www.newsweek.com/pink-skies-antarctica-tonga-volcano-afterglow-1725053 |website=Newsweek |access-date=16 August 2022 |date=15 July 2022}}</ref>

== Assistance ==
[[File:RNZAF No. 3 Squadron prepare to deploy to Tonga.jpg|thumb|RNZAF 3SQN maintenance teams prepare two NH90 helicopters for long-term operations to assist Tonga.]]
New Zealand's Prime Minister Jacinda Ardern said officials from the Ministry of Foreign Affairs were discussing the provision of aid to Tonga.<ref name="Newshub">{{cite news|agency=Reuters|title=Tonga eruption and tsunami: New Zealand officials working to determine what's needed for Pacific Island nation – Jacinda Ardern |url=https://www.newshub.co.nz/home/politics/2022/01/tonga-eruption-and-tsunami-new-zealand-officials-working-to-what-s-needed-for-pacific-island-nation-jacinda-ardern.html|access-date=16 January 2022 |publisher=Newshub|date=16 January 2022|archive-date=15 January 2022|archive-url=https://web.archive.org/web/20220115234228/https://www.newshub.co.nz/home/politics/2022/01/tonga-eruption-and-tsunami-new-zealand-officials-working-to-what-s-needed-for-pacific-island-nation-jacinda-ardern.html|url-status=live}}</ref> Ardern described the events in Tonga as "hugely concerning".<ref name="1NewsLIVE"/> On 16 January, she announced New Zealand was donating NZ$500,000, which was "very much the starting point". The Royal New Zealand Navy was preparing to sail and a {{wipe|Royal New Zealand Air Force}} [[Engineering:Lockheed P-3 Orion|P-3 Orion]] would be sent on a reconnaissance flight as soon as it was safe to do so. The ash cloud was estimated at {{cvt|19000|m}} high, well above the Orion's service ceiling.<ref name="RNŹ">{{cite news|title=Prime Minister Jacinda Ardern addresses situation in Tonga following volcanic eruption, tsunami|url=https://www.rnz.co.nz/news/national/459644/watch-prime-minister-jacinda-ardern-addresses-situation-in-tonga-following-volcanic-eruption-tsunami|access-date=16 January 2022|publisher=Radio New Zealand|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116050617/https://www.rnz.co.nz/news/national/459644/watch-prime-minister-jacinda-ardern-addresses-situation-in-tonga-following-volcanic-eruption-tsunami|url-status=live}}</ref> The C-130H Hercules airlift is ready to serve as well.<ref>{{Cite instagram|user=jacindaardern|postid=CYxnelrPXux|title=Aotearoa New Zealand Stands Ready to Assist the People of Tonga|date=16 January 2022|author=Jacinda Ardern|archive-url=https://archive.vn/KgjpI#selection-447.442-447.553|archive-date=24 March 2022|access-date=24 March 2022}}</ref> Following reports of no continued ashfall in Tonga, the P-3 Orion left RNZAF Base Auckland for Tonga on the morning of 17 January.<ref>{{cite web|date=17 January 2022|title=Tonga eruption: NZ Air Force plane leaves for reconnaissance flight to assess damage|url=https://www.rnz.co.nz/news/national/459667/tonga-eruption-nz-air-force-plane-leaves-for-reconnaissance-flight-to-assess-damage|url-status=live|archive-url=https://web.archive.org/web/20220125121247/https://www.rnz.co.nz/news/national/459667/tonga-eruption-nz-air-force-plane-leaves-for-reconnaissance-flight-to-assess-damage|archive-date=17 January 2022|access-date=16 January 2022|publisher=RNZ}}</ref> On 18 January, as an RNZAF [[Engineering:Lockheed C-130 Hercules|Lockheed C-130 Hercules]] was unable to land following continued ashfall in Tonga, two Royal New Zealand Navy ships set sail for Tonga. HMNZS ''Wellington'' carried survey equipment and a helicopter, while HMNZS ''Aotearoa'' carried {{cvt|250000|L}} of water and desalination equipment to produce a further {{cvt|70000|L}} per day.<ref>{{cite web |date=18 January 2022|title=Tonga eruption: New Zealand sends two ships with supplies|url=https://www.rnz.co.nz/news/political/459763/tonga-eruption-new-zealand-sends-two-ships-with-supplies|access-date=18 January 2022 |publisher=RNZ|archive-date=18 January 2022|archive-url=https://web.archive.org/web/20220118021719/https://www.rnz.co.nz/news/political/459763/tonga-eruption-new-zealand-sends-two-ships-with-supplies|url-status=live}}</ref> On 20 January, New Zealand announced that it would dispatch a third warship, [[Engineering:HMNZS Canterbury (L421)|HMNZS ''Canterbury'']] with two [[Engineering:NHIndustries NH90|NH90 helicopters]] to assist with relief efforts.<ref>{{cite news|date=20 January 2022|title=Third navy ship to depart for Tonga, first relief supplies to arrive today|publisher=Radio New Zealand|url=https://www.rnz.co.nz/news/national/459882/third-navy-ship-to-depart-for-tonga-first-relief-supplies-to-arrive-today|url-status=live|access-date=20 January 2022|archive-url=https://web.archive.org/web/20220120015241/https://www.rnz.co.nz/news/national/459882/third-navy-ship-to-depart-for-tonga-first-relief-supplies-to-arrive-today|archive-date=20 January 2022}}</ref>

Tonga accepted an offer by the Australian government of a surveillance flight to assess the damage. Two [[Engineering:Boeing P-8 Poseidon|Boeing P-8A Poseidon]] maritime patrol aircraft and a [[Engineering:Lockheed Martin C-130J Super Hercules|Lockheed C-130J Hercules]] of the {{wipe|Royal Australian Air Force}} departed on the morning of 17 January 2022 for Tonga to survey damage to roadways, ports and power lines.<ref name="MFAAus">{{cite web|publisher=Government of Australia|title=Australia to provide assistance to Tonga following volcanic eruption and tsunami|url=https://www.foreignminister.gov.au/minister/marise-payne/media-release/australia-provide-assistance-tonga-following-volcanic-eruption-and-tsunami|department=Minister for Foreign Affairs|access-date=16 January 2022|date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116073634/https://www.foreignminister.gov.au/minister/marise-payne/media-release/australia-provide-assistance-tonga-following-volcanic-eruption-and-tsunami|url-status=live}}</ref><ref>{{cite news|date=16 January 2022|title=Australia and New Zealand send flights to assess damage from Tonga volcano eruption|publisher=ABC News|url=https://www.abc.net.au/news/2022-01-17/tonga-volcano-surveillance-flights-tsunami-warning-damage/100760394|access-date=17 January 2022|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117031231/https://www.abc.net.au/news/2022-01-17/tonga-volcano-surveillance-flights-tsunami-warning-damage/100760394|url-status=live}}</ref><ref>{{cite web|last=Defence|first=Department of|date=18 January 2022|title=ADF supports Australia's response in Tonga|url=https://news.defence.gov.au/international/adf-supports-australias-response-tonga|archive-url=https://web.archive.org/web/20220120050043/https://news.defence.gov.au/international/adf-supports-australias-response-tonga|archive-date=20 January 2022|access-date=19 January 2022|website=news.defence.gov.au}}</ref> The Australian and New Zealand governments also announced they were coordinating their humanitarian response with France and the United States.<ref>{{cite web |url=https://www.theage.com.au/politics/federal/tsunami-warning-australia-new-zealand-combine-for-tonga-disaster-response-20220116-p59omh.html|title=Australia, New Zealand combine for Tonga disaster response |newspaper=The Age|date=16 January 2022|access-date=16 January 2022|archive-date=16 January 2022|archive-url=https://web.archive.org/web/20220116105730/https://www.theage.com.au/politics/federal/tsunami-warning-australia-new-zealand-combine-for-tonga-disaster-response-20220116-p59omh.html|url-status=live}}</ref><ref>{{cite web|url=https://www.aljazeera.com/news/2022/1/17/tonga-calls-for-immediate-aid-after-volcanic-eruption-tsunami|title=Tonga calls for 'immediate aid' after volcanic eruption, tsunami|date=17 January 2022|website=aljazeera.com|publisher=Al Jazeera Media Network|access-date=17 January 2022 |archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117031229/https://www.aljazeera.com/news/2022/1/17/tonga-calls-for-immediate-aid-after-volcanic-eruption-tsunami|url-status=live}}</ref> Assistance from France is provided through the humanitarian aid mechanism of the FRANZ agreement with Australia and New Zealand.<ref>{{cite web|url=https://www.voanews.com/a/first-death-in-tonga-volcano-blast-as-nation-remains-cut-off-/6400782.html|title=First Death Reported in Tonga Volcano Blast as Nation Remains Cut Off|website=Voice of America|date=17 January 2022|access-date=18 January 2022 |archive-date=18 January 2022|archive-url=https://web.archive.org/web/20220118151756/https://www.voanews.com/a/first-death-in-tonga-volcano-blast-as-nation-remains-cut-off-/6400782.html|url-status=live}}</ref> Australia would later announce that HMAS ''Adelaide'' would be deployed to Tonga with water purification and humanitarian supplies.<ref>{{cite web|last=Foley|first=Mike|date=19 January 2022|title=Help on the way after Tongan volcano wipes out houses on outlying islands|url=https://www.smh.com.au/world/oceania/tongan-volcano-wipes-out-houses-on-outlying-islands-20220119-p59pgb.html|url-status=live|archive-url=https://ghostarchive.org/archive/20220121220140/https://www.smh.com.au/world/oceania/tongan-volcano-wipes-out-houses-on-outlying-islands-20220119-p59pgb.html|archive-date=21 January 2022|access-date=21 January 2022|newspaper=The Sydney Morning Herald}}</ref> The United States dispatched USS ''Sampson'' as well as a Coast Guard vessel while the United Kingdom deployed HMS ''Spey''.<ref>{{cite web|last=Lewis|first=Lydia|date=23 January 2022|title=Global aid effort underway for Tonga's recovery|url=https://www.rnz.co.nz/international/pacific-news/460004/global-aid-effort-underway-for-tonga-s-recovery|archive-url=https://ghostarchive.org/archive/20220123040153/https://www.rnz.co.nz/international/pacific-news/460004/global-aid-effort-underway-for-tonga-s-recovery|archive-date=23 January 2022|access-date=23 January 2022|work=Radio New Zealand|url-status=live}}</ref><ref>{{cite news |title=Covid-stricken Australian aid ship makes contactless delivery to virus-free Tonga |url=https://www.theguardian.com/world/2022/jan/27/covid-stricken-australian-aid-ship-makes-contactless-delivery-to-virus-free-tonga |access-date=29 January 2022 |work={{wipe|The Guardian}} |agency=Associated Press |date=27 January 2022 |archive-url=https://web.archive.org/web/20220128040512/https://www.abc.net.au/news/2022-01-26/hmas-adelaide-delivers-aid-tonga-despite-covid-outbreak-on-board/100783940 |archive-date=28 January 2022|url-status=live}}</ref> After 23 crew members of the ''Adelaide'' tested positive for COVID-19 while enroute to Tonga, the ship made a contactless delivery.<ref>{{cite news |title=HMAS Adelaide delivers vital aid to Tonga a day after COVID-19 outbreak was detected on board |url=https://www.abc.net.au/news/2022-01-26/hmas-adelaide-delivers-aid-tonga-despite-covid-outbreak-on-board/100783940 |access-date=29 January 2022 |work=ABC News |agency=Associated Press |publisher=Australian Broadcasting Corporation |date=27 January 2022 |archive-url=https://web.archive.org/web/20220126091202/https://www.abc.net.au/news/2022-01-26/hmas-adelaide-delivers-aid-tonga-despite-covid-outbreak-on-board/100783940 |archive-date=26 January 2022|url-status=live}}</ref>

On 17 January, officials in Tonga called for immediate aid. Speaker of the Legislative Assembly of Tonga Fatafehi Fakafanua in a social media post wrote that "Tonga needs immediate assistance to provide its citizens with fresh drinking water and food". The International Red Cross and Red Crescent Movement and the Pacific Island Forum has offered its assistance.<ref>{{cite web|title=Tonga calls for 'immediate aid' after volcanic eruption, tsunami|url=https://www.aljazeera.com/news/2022/1/17/tonga-calls-for-immediate-aid-after-volcanic-eruption-tsunami|access-date=17 January 2022 |website=aljazeera.com|archive-date=17 January 2022|archive-url=https://web.archive.org/web/20220117031229/https://www.aljazeera.com/news/2022/1/17/tonga-calls-for-immediate-aid-after-volcanic-eruption-tsunami |url-status=live}}</ref> Tearfund and [[Organization:Oxfam|Oxfam]] provided immediate assistance by supporting people with food and water. Oxfam already had filtering units in Tongatapu which could turn salt water into drinking water. UNICEF will work with the Tongan government to reach affected children and families. The agency was also ready to transport its emergency supplies from Fiji and Brisbane.<ref>{{cite web|last=Foon|first=Eleisha|date=17 January 2022|title=Tonga eruption: Aid agencies look at how best to support Tongans|url=https://www.rnz.co.nz/international/pacific-news/459685/tonga-eruption-aid-agencies-look-at-how-best-to-support-tongans|url-status=live|archive-url=https://web.archive.org/web/20220117042428/https://www.rnz.co.nz/international/pacific-news/459685/tonga-eruption-aid-agencies-look-at-how-best-to-support-tongans|archive-date=17 January 2022|access-date=17 January 2022|publisher=RNZ}}</ref>

Fiji's Attorney General and Acting Prime Minister Aiyaz Sayed-Khaiyum said that Fiji was working with New Zealand and Australia to coordinate regional relief efforts. He added that Fiji had offered to dispatch Republic of Fiji Military Forces (RFMF) personnel and engineers that would join the Australian Defence Force (ADF). Relief supplies would also be sent to the Lau group that was affected by the tsunami.<ref>{{cite web|last=Pratap|first=Ritika|date=19 January 2022|title=RFMF to assist Tonga through ADF|url=https://www.fbcnews.com.fj/news/rfmf-to-assist-tonga-through-adf/|url-status=live|archive-url=https://archive.today/20220119085803/https://www.fbcnews.com.fj/news/rfmf-to-assist-tonga-through-adf/|archive-date=19 January 2022|access-date=19 January 2022|publisher=Fiji Broadcasting Corporation}}</ref><ref>{{cite web|last=Krishant|first=Naveel|date=19 January 2022|title=Govt to send immediate relief supplies to the Lau Group tomorrow|url=https://www.fijivillage.com/news/Govt-to-send-immediate-relief-supplies-to-the-Lau-Group-tomorrow-x548rf/|url-status=live|archive-url=https://archive.today/20220119090752/https://www.fijivillage.com/news/Govt-to-send-immediate-relief-supplies-to-the-Lau-Group-tomorrow-x548rf/|archive-date=19 January 2022|access-date=19 January 2022|website=fijivillage.com}}</ref> On 29 January, a chartered commercial vessel was deployed to Tonga. Aboard the vessel were 11 [[Engineering:Shipping container|shipping container]]s filled with relief supplies. Four containers were from the Tongan Community in Fiji while the rest were from donations by government and non-government organizations.<ref>{{Cite web|last=Naivalurua|first=Navitalai|date=29 January 2022|title=Fiji sends 11 40ft containers of relief assistance to Tonga|url=https://www.fijivillage.com/news/Fiji-sends-11-40ft-containers-of-relief-assistance-to-Tonga-8f4x5r/|url-status=live|archive-url=https://ghostarchive.org/archive/20220130090138/https://www.fijivillage.com/news/Fiji-sends-11-40ft-containers-of-relief-assistance-to-Tonga-8f4x5r/|archive-date=30 January 2022|access-date=30 January 2022|website=www.fijivillage.com|language=en}}</ref><ref>{{Cite web|last=Reece|first=Lena|date=30 January 2022|title=Fiji deploys team and relief supplies to Tonga|url=https://www.fbcnews.com.fj/news/fiji-deploys-team-and-relief-supplies-to-tonga/|url-status=live|archive-url=https://ghostarchive.org/archive/20220130090139/https://www.fbcnews.com.fj/news/fiji-deploys-team-and-relief-supplies-to-tonga/|archive-date=30 January 2022|access-date=30 January 2022|website=Fiji Broadcasting Corporation}}</ref>

The International Federation of Red Cross and Red Crescent Societies (IFRC) Asia Pacific said that drinking water were hurriedly distributed to people in need due to the tsunami and ash affecting local water supply. The Tonga Red Cross provided temporary shelters and supplied water to affected communities. Emergency response teams were sent to Mango, Fonoifua and Namuka islands.<ref name="IFRC">{{cite web|author1=International Federation of Red Cross And Red Crescent Societies|date=19 January 2022|title=Red Cross in Tonga confirms urgent need for safe drinking water|url=https://www.ifrc.org/press-release/red-cross-tonga-confirms-urgent-need-safe-drinking-water|url-status=live|archive-url=https://ghostarchive.org/archive/20220123080132/https://www.ifrc.org/press-release/red-cross-tonga-confirms-urgent-need-safe-drinking-water|archive-date=23 January 2022|access-date=23 January 2022|publisher=IFRC}}</ref>

=== International ===
* {{flag|China}}: On 17 January, the Red Cross Society of China decided to provide US$100,000 of emergency humanitarian aid in cash to the Tongan side,<ref>{{cite web|title=Foreign Ministry Spokesperson Zhao Lijian's Regular Press Conference on January 17, 2022|url=http://www.china-embassy.org/eng/lcbt/wjbfyrbt/202201/t20220117_10598778.htm|website=Foreign Ministry Spokesperson's Remarks|publisher=Embassy of the People's Republic of China to the United States of America|access-date=18 January 2022|date=18 January 2022|archive-date=18 January 2022|archive-url=https://archive.today/20220118221437/http://www.china-embassy.org/eng/lcbt/wjbfyrbt/202201/t20220117_10598778.htm|url-status=live}}</ref> while the government of China said it would deliver a batch of disaster relief materials to Tonga at the request of the South Pacific island country.<ref>{{cite news|title=China to deliver disaster-relief supplies to Tonga: FM spokesperson|url=https://english.news.cn/20220118/07d4204189404b778a3cdfec2abe4a01/c.html|access-date=18 January 2022|agency=Xinhua News Agency|date=18 January 2022|archive-date=18 January 2022|archive-url=https://archive.today/20220118222006/https://english.news.cn/20220118/07d4204189404b778a3cdfec2abe4a01/c.html|url-status=live}}</ref> On 19 January, the Chinese government delivered a batch of emergency supplies such as drinking water and food to Tonga through the embassy in Tonga. The Chinese Embassy in Fiji raised another batch of RMB 1 million materials to deliver to Tonga. On 27 and 31 January, the Chinese army dispatched air force transport aircraft Y-20 and naval ships to Tonga to deliver emergency and post-disaster reconstruction materials such as water purifiers, tents, personal protective equipment, generators, water pumps, tractors, radio communication equipment in two batches. The two batches of materials are 33 tons and more than 1,400 tons respectively. They arrived on 28 January and 15 February local time respectively.<ref>{{cite web|last=Wong|first=Catherine|date=27 January 2022|title=Chinese military planes deliver emergency supplies to tsunami-hit Tonga|url=https://www.scmp.com/news/china/diplomacy/article/3164988/chinese-military-planes-deliver-emergency-supplies-tsunami-hit|url-status=live|archive-url=https://archive.today/20220127191323/https://www.scmp.com/news/china/diplomacy/article/3164988/chinese-military-planes-deliver-emergency-supplies-tsunami-hit|archive-date=27 January 2022|access-date=27 January 2022|publisher=South China Morning Post}}</ref>
* {{flag|Israel}}: Israeli Foreign Minister Yair Lapid stated that Israel was exploring ways of providing aid to Tonga through its aid agency Mashav including access to safe drinking water.<ref>{{cite news |title=Israel working to provide aid to Tonga after volcanic eruption |url=https://www.jpost.com/international/article-692710 |access-date=25 January 2022 |work=The Jerusalem Post |agency={{wipe|Reuters}} |date=17 January 2022 |archive-url=https://web.archive.org/web/20220117183921/https://www.jpost.com/international/article-692710 |archive-date=17 January 2022|url-status=live}}</ref>
* {{flag|Singapore}}: On 18 January, the Singapore Red Cross Society pledged S$50,000 in aid to Tonga and also announced a fundraising effort to raise more help for those affected by the tsunami.<ref>{{cite news|last1=Ting|first1=Choo Yun|date=18 January 2022|title=Singapore Red Cross pledges $50,000 to aid tsunami-hit Tonga and will launch fund-raising appeal|newspaper=The Straits Times|url=https://www.straitstimes.com/asia/australianz/singapore-red-cross-pledges-50000-to-aid-tsunami-hit-tonga-and-will-launch-fund-raising-appeal|url-status=live|access-date=18 January 2022|archive-url=https://web.archive.org/web/20220126185427/https://www.straitstimes.com/asia/australianz/singapore-red-cross-pledges-50000-to-aid-tsunami-hit-tonga-and-will-launch-fund-raising-appeal|archive-date=18 January 2022}}</ref><ref>{{Cite web|title=[Tonga Volcanic Eruption] Singapore Red Cross to launch public appeal; commits humanitarian aid to affected communities|url=https://www.redcross.sg/media-centre/press-releases/1110-tonga-volcanic-eruption-singapore-red-cross-to-launch-public-appeal-commits-humanitarian-aid-to-affected-communities.html|access-date=15 February 2022|website=www.redcross.sg|language=en-gb|archive-url=https://web.archive.org/web/20220211070859/https://www.redcross.sg/media-centre/press-releases/1110-tonga-volcanic-eruption-singapore-red-cross-to-launch-public-appeal-commits-humanitarian-aid-to-affected-communities.html|archive-date=11 February 2022}}</ref>
* {{flag|Japan}}: On 20 January, the Japanese Government dispatched two C-130H via Australia to Tonga. Subsequently, the Japanese Ministry of Defense decided to send JS ''Osumi'' with {{cvt|60000|L}} of drinking water, high-pressure cleaning devices for removing volcanic ash, and two CH-47J onboard. The Ministry had also deployed its C-2 transport aircraft loaded with additional relief supplies.<ref>{{Cite web|date=24 January 2022|title=Japan's MSDF vessel departs carrying aid to disaster-stricken Tonga|url=https://www.japantimes.co.jp/news/2022/01/24/national/sdf-aid-tonga/|url-access=registration|url-status=live|archive-url=https://ghostarchive.org/archive/20220124090120/https://www.japantimes.co.jp/news/2022/01/24/national/sdf-aid-tonga/|archive-date=24 January 2022|access-date=24 January 2022|newspaper=The Japan Times}}</ref> The Japanese Government has also planned to offer more than [[Finance:Yen and yuan sign|¥]]114 million (US$1 million) in funds for Tonga.<ref>{{cite web|date=20 January 2022|title=Japan to provide relief supplies and over ¥114 million to tsunami-hit Tonga|url=https://www.japantimes.co.jp/news/2022/01/20/national/japan-tonga-relief/|url-access=registration|url-status=live|archive-url=https://ghostarchive.org/archive/20220124090119/https://www.japantimes.co.jp/news/2022/01/20/national/japan-tonga-relief/|archive-date=24 January 2022|access-date=24 January 2022|newspaper=The Japan Times}}</ref>
* {{flag|India}}: On 25 January, the Indian Government provided an immediate relief assistance of US$200,000 "to support relief, rehabilitation and reconstruction efforts" in Tonga, which it described as "a close friend and partner under the Forum for India-Pacific Islands Cooperation (FIPIC).<ref>{{Cite web|last=Media Center|date=25 January 2022|title=India announces US$ 200,000 immediate relief assistance to Tonga in the wake of tsunami|url=https://www.mea.gov.in/press-releases.htm?dtl/34769/India_announces_US_200000_immediate_relief_assistance_to_Tonga_in_the_wake_of_tsunami|url-status=live|archive-url=https://archive.today/20220127011243/https://www.mea.gov.in/press-releases.htm?dtl/34769/India_announces_US_200000_immediate_relief_assistance_to_Tonga_in_the_wake_of_tsunami|archive-date=27 January 2022|access-date=27 January 2022|website=Ministry of External Affairs}}</ref>

===Non-state actors===
On 6 February, ''The New Zealand Herald'' and the Fiji Broadcasting Corporation's FBC News reported that [[Company:SpaceX|SpaceX]] engineers were working to restore Internet access in Tonga. New Zealand National Party Member of Parliament Shane Reti had earlier petitioned SpaceX CEO [[Biography:Elon Musk|Elon Musk]] for assistance in providing [[Engineering:Starlink|Starlink]] satellite technology to the island country. In response, Musk had asked on [[Company:Twitter|Twitter]] whether Tonga authorities could inform him on whether Starlink terminals were needed. The Fijian Minister for Communications Aiyaz Sayed-Khaiyum subsequently confirmed that SpaceX engineers would establish and operate a temporary ground station in Fiji to assist with efforts to restore Internet access in Tonga.<ref>{{cite news |title=Tonga volcanic eruption and tsunami: Elon Musk's SpaceX reportedly in Fiji preparing to help with telecommunications |url=https://www.nzherald.co.nz/nz/tonga-volcanic-eruption-and-tsunami-elon-musks-spacex-reportedly-in-fiji-preparing-to-help-with-telecommunications/5HTCC4BO6DIVMPWQTW3BULEST4/# |access-date=9 February 2022 |work=The New Zealand Herald |date=6 February 2022 |archive-url=https://web.archive.org/web/20220207151609/https://www.nzherald.co.nz/nz/tonga-volcanic-eruption-and-tsunami-elon-musks-spacex-reportedly-in-fiji-preparing-to-help-with-telecommunications/5HTCC4BO6DIVMPWQTW3BULEST4/ |archive-date=7 February 2022|url-status=live}}</ref><ref>{{cite news |last1=Reece |first1=Lena |title=SpaceX engineers in Fiji for six months |url=https://www.fbcnews.com.fj/business/spacex-engineers-in-fiji-for-six-months/ |access-date=9 February 2022 |work=FBC News |date=8 February 2022 |archive-url=https://web.archive.org/web/20220208130821/https://www.fbcnews.com.fj/business/spacex-engineers-in-fiji-for-six-months/ |archive-date=4 February 2022|url-status=live}}</ref>

By 23 February, Tonga Cable had managed to restore Tonga's fibre-optic cable with the assistance of SpaceX. On 21 February, repair works on the Southern Cross Cable were completed, restoring Internet to Tonga.<ref>{{cite news |title=Internet restored to Tonga after cable destroyed by eruption is repaired |first=James |last=Halpin |date=22 February 2022 |url=https://www.stuff.co.nz/world/south-pacific/300523665/internet-restored-to-tonga-after-cable-destroyed-by-eruption-is-repaired |newspaper=Stuff |access-date=22 February 2022 |archive-date=22 February 2022 |archive-url=https://web.archive.org/web/20220222074935/https://www.stuff.co.nz/world/south-pacific/300523665/internet-restored-to-tonga-after-cable-destroyed-by-eruption-is-repaired |url-status=live }}</ref><ref>{{cite news |last1=Krishnamurthi |first1=Sri |title=The Southern Cross cable that connects Tonga to the outside world is fixed |url=https://www.rnz.co.nz/international/pacific-news/462052/the-southern-cross-cable-that-connects-tonga-to-the-outside-world-is-fixed |access-date=24 May 2022 |work=Radio New Zealand |date=22 February 2022 |archive-date=17 March 2022 |archive-url=https://web.archive.org/web/20220317223604/https://www.rnz.co.nz/international/pacific-news/462052/the-southern-cross-cable-that-connects-tonga-to-the-outside-world-is-fixed |url-status=live }}</ref>

Tongan Olympian flagbearer Pita Taufatofua, who became widely known during the 2016 Summer Olympics, gathered more than {{wipe|United States dollar}}330,000 in aid to his native country, after he opened a GoFundMe fundraising website.<ref>{{cite news|last1=Abdel-Baqui|first1=Omar|date=19 January 2022|title=Pita Taufatofua, the Shirtless Tongan Olympian, Raises Hundreds of Thousands of Dollars for Tonga Relief Aid|newspaper=The Wall Street Journal|url=https://www.wsj.com/articles/pita-taufatofua-the-shirtless-tongan-olympic-flag-bearer-raises-hundreds-of-thousands-of-dollars-for-tonga-relief-aid-11642607797|url-status=live|url-access=registration|access-date=20 January 2022|archive-url=https://ghostarchive.org/archive/20220120120140/https://www.wsj.com/articles/pita-taufatofua-the-shirtless-tongan-olympic-flag-bearer-raises-hundreds-of-thousands-of-dollars-for-tonga-relief-aid-11642607797|archive-date=20 January 2022}}</ref>

== See also ==
* List of volcanic eruptions in the 21st century
* [[Earth:1808 mystery eruption|1808 mystery eruption]] - possibly an earlier eruption in Tonga
* 2009 Samoa earthquake and tsunami
* 2009 Tonga undersea volcanic eruption
* List of earthquakes in Tonga
* [[Earth:Tonga Trench|Tonga Trench]]
{{clear}}

==Notes==
{{reflist|group=nb}}

== References ==
{{reflist|30em}}

== External links ==
* [https://emergency.copernicus.eu/EMSR558 EMSR558: Volcano eruption in Tonga (damage grading maps)] – Copernicus Emergency Management Service
* [https://reliefweb.int/disaster/vo-2022-000005-ton ReliefWeb's main page Tonga: Volcanic Eruption and Tsunami – January 2022]
* [https://cimss.ssec.wisc.edu/satellite-blog/archives/44252 CIMSS Satellite Blog]
*[https://www.nature.com/articles/d41586-022-01544-y Update on the eruption and consequences], ''Nature'' news, 8 June 2022


{{DEFAULTSORT:2022 Hunga Tonga-Hunga Ha'apai eruption and tsunami}}
[[Category:Plinian eruptions]]

{{Sourceattribution|2021–22 Hunga Tonga–Hunga Haʻapai eruption and tsunami|1}}