Astronomy:Carrington Event

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Short description: Geomagnetic storm in 1859

Template:Infobox solar storm

The Carrington Event was the most intense geomagnetic storm in recorded history, peaking on 1–2 September 1859 during solar cycle 10. It created strong auroral displays that were reported globally and caused sparking and even fires in telegraph stations.[1] The geomagnetic storm was most likely the result of a coronal mass ejection (CME) from the Sun colliding with Earth's magnetosphere.[2]

The geomagnetic storm was associated with a very bright solar flare on 1 September 1859. It was observed and recorded independently by British astronomers Richard Carrington and Richard Hodgson—the first records of a solar flare. A geomagnetic storm of this magnitude occurring today has the potential to cause widespread electrical disruptions, blackouts, and damage to the electrical power grid.[3][4][5]

History

Geomagnetic storm

Image of the July 2012 solar storm, which generated CMEs of comparable strength to the one of 1859. The small bright circle in the light baffle demonstrates the size of the Sun.

On 1 and 2 September 1859, one of the largest geomagnetic storms (as recorded by ground-based magnetometers) occurred.[6] Estimates of the storm strength (Dst) range from −0.80 to −1.75 μT.[7]

The geomagnetic storm is thought to have been caused by a coronal mass ejection (CME) that traveled directly toward Earth, taking 17.6 hours to make the 150×10^6 km (93×10^6 mi) journey. Typical CMEs take several days to arrive at Earth, but it is believed that the relatively high speed of this CME was made possible by a prior CME, perhaps the cause of the large aurora event on 29 August that "cleared the way" of ambient solar wind plasma for the Carrington Event.[8]

Associated solar flare

Just before noon on 1 September 1859, the English astronomers Richard Carrington and Richard Hodgson independently recorded the earliest observations of a solar flare.[8] Carrington and Hodgson compiled independent reports which were published side by side in Monthly Notices of the Royal Astronomical Society and exhibited their drawings of the event at the November 1859 meeting of the Royal Astronomical Society.[9][10]

Because of a geomagnetic solar flare effect (a "magnetic crochet")[11] observed in the Kew Observatory magnetometer record by Scottish physicist Balfour Stewart, and a geomagnetic storm observed the following day, Carrington suspected a solar–terrestrial connection.[12] However, he was not sure whether the two phenomena were related, writing that "one swallow does not make a summer".[9] Worldwide reports of the effects of the geomagnetic storm of 1859 were compiled and published by American mathematician Elias Loomis, which support the observations of Carrington and Stewart.[13]

Impact

Auroras

Aurora during a geomagnetic storm that was most likely caused by a coronal mass ejection from the Sun on 24 May 2010, taken from the International Space Station

Auroras were seen around the world in the northern and southern hemispheres. The aurora borealis over the Rocky Mountains in the United States was so bright that the glow woke gold miners, who were reported to have begun to prepare breakfast because they thought it was morning. It was also reported that people in the north-eastern United States could read a newspaper by the aurora's light.[8][14] The aurora was also visible from the poles to low latitude areas such as south-central Mexico,[15][16] Cuba, Hawaii, Queensland,[17] southern Japan and China,[18] New Zealand,[19] and even at lower latitudes very close to the equator, such as Colombia.[20]

On Saturday 3 September 1859, the Baltimore American and Commercial Advertiser reported that

Those who happened to be out late on Thursday night had an opportunity of witnessing another magnificent display of the auroral lights. The phenomenon was very similar to the display on Sunday night, though at times the light was, if possible, more brilliant, and the prismatic hues more varied and gorgeous. The light appeared to cover the whole firmament, apparently like a luminous cloud, through which the stars of the larger magnitude indistinctly shone. The light was greater than that of the moon at its full, but had an indescribable softness and delicacy that seemed to envelop everything upon which it rested. Between 12 and 1 o'clock, when the display was at its full brilliancy, the quiet streets of the city resting under this strange light, presented a beautiful as well as singular appearance.[21]

In 1909, an Australian gold miner named C. F. Herbert retold his observations in a letter to the Daily News in Perth,

I was gold-digging at Rokewood, about four miles [6 km] from Rokewood township (Victoria). Myself and two mates looking out of the tent saw a great reflection in the southern heavens at about 7 o'clock p.m., and in about half an hour, a scene of almost unspeakable beauty presented itself: Lights of every imaginable color were issuing from the southern heavens, one color fading away only to give place to another if possible more beautiful than the last, the streams mounting to the zenith, but always becoming a rich purple when reaching there, and always curling round, leaving a clear strip of sky, which may be described as four fingers held at arm's length. The northern side from the zenith was also illuminated with beautiful colors, always curling round at the zenith, but were considered to be merely a reproduction of the southern display, as all colors south and north always corresponded. It was a sight never to be forgotten, and was considered at the time to be the greatest aurora recorded [...]. The rationalist and pantheist saw nature in her most exquisite robes, recognising, the divine immanence, immutable law, cause, and effect. The superstitious and the fanatical had dire forebodings, and thought it a foreshadowing of Armageddon and final dissolution.[22]

Telegraphs

Because of the geomagnetically induced current from the electromagnetic field, telegraph systems all over Europe and North America failed, in some cases giving their operators electric shocks.[23] Telegraph pylons threw sparks.[24] Some operators were able to continue to send and receive messages despite having disconnected their power supplies.[25][26] The following conversation occurred between two operators of the American telegraph line between Boston, Massachusetts, and Portland, Maine, on the night of 2 September 1859 (as reported in the Boston Evening Traveler):

Boston operator (to Portland operator): "Please cut off your battery [power source] entirely for fifteen minutes."

Portland operator: "Will do so. It is now disconnected."

Boston: "Mine is disconnected, and we are working with the auroral current. How do you receive my writing?"

Portland: "Better than with our batteries on. – Current comes and goes gradually."

Boston: "My current is very strong at times, and we can work better without the batteries, as the aurora seems to neutralize and augment our batteries alternately, making current too strong at times for our relay magnets. Suppose we work without batteries while we are affected by this trouble."

Portland: "Very well. Shall I go ahead with business?"

Boston: "Yes. Go ahead."

The conversation was carried on for around two hours using no battery power and working solely with the current induced by the aurora, the first time on record that more than a word or two was transmitted in such manner.[27]

Similar events

See also: Astronomy:List of solar storms

Another strong solar storm occurred in February 1872.[28] Less severe storms also occurred in 1921 (this was comparable by some measures), 1938, 1941, 1958, 1959 and 1960, when widespread radio disruption was reported. The flares and CMEs of the August 1972 solar storms were similar to the Carrington event in size and magnitude; however, unlike the 1859 storms, they did not cause an extreme geomagnetic storm. The March 1989 geomagnetic storm knocked out power across large sections of Quebec, while the 2003 Halloween solar storms registered the most powerful solar explosions ever recorded. On 23 July 2012, a "Carrington-class" solar superstorm (solar flare, CME, solar electromagnetic pulse) was observed, but its trajectory narrowly missed Earth by a margin of roughly nine days.[5][29] During the May 2024 solar storms, an aurora borealis was sighted as far south as Puerto Rico.[30]


Other research has looked for signatures of large solar flares and CMEs in carbon-14 in tree rings and beryllium-10 (among other isotopes) in ice cores. The signature of a large solar storm has been found for the years 774–775 and 993–994.[31][32] Carbon-14 levels stored in 775 suggest an event about 20 times the normal variation of the Sun's activity, and 10 or more times the size of the Carrington Event.[33] An event in 7176 BCE may have exceeded even the 774–775 CE event based on this proxy data.[34]

Whether the physics of solar flares is similar to that of even larger superflares is still unclear. The Sun may differ in important ways such as size and speed of rotation from the types of stars that are known to produce superflares.[32]

Other evidence

Ice cores containing thin nitrate-rich layers have been analysed to reconstruct a history of past solar storms predating reliable observations. This was based on the hypothesis that solar energetic particles would ionize nitrogen, leading to the production of nitric oxide and other oxidised nitrogen compounds, which would not be too diluted in the atmosphere before being deposited along with snow.[35]

Beginning in 1986, some researchers claimed that data from Greenland ice cores showed evidence of individual solar particle events, including the Carrington Event.[36] More recent ice core work, however, casts significant doubt on this interpretation and shows that nitrate spikes are likely not a result of solar energetic particle events but can be due to terrestrial events such as forest fires, and correlate with other chemical signatures of known forest fire plumes. Nitrate events in cores from Greenland and Antarctica do not align, so the hypothesis that they reflect proton events is now in significant doubt.[35][37][38]

A 2024 study analysed digitized magnetogram readings from magnetic observatories at Kew and Greenwich. "Initial analysis suggests the rates of change of the field of over 700 nT/min exceeded the 1-in-100 years extreme value of 350–400 nT/min at this latitude based on digital-era records",[39] indicating a far greater change rate than modern digital measurements.[40]

See also

References

  1. ↑ Kimball, D. S. (April 1960). "A Study of the Aurora of 1859". Geophysical Institute at the University of Alaska. https://scholarworks.alaska.edu/bitstream/handle/11122/3607/GI%20Reports%20109.pdf?sequence=1&isAllowed=y. Retrieved 28 November 2021. 
  2. ↑ Tsurutani, B. T. (2003). "The extreme magnetic storm of 1–2 September 1859". Journal of Geophysical Research 108 (A7): 1268. doi:10.1029/2002JA009504. Bibcode: 2003JGRA..108.1268T. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2002JA009504. Retrieved 28 November 2021. 
  3. ↑ Solar Storm Risk to the North American Electric Grid. Lloyd's of London and Atmospheric and Environmental Research, Inc.. 2013. https://assets.lloyds.com/assets/pdf-solar-storm-risk-to-the-north-american-electric-grid/1/pdf-Solar-Storm-Risk-to-the-North-American-Electric-Grid.pdf. Retrieved 17 February 2022. 
  4. ↑ Baker, D. N. (2008). Severe Space Weather Events – Understanding Societal and Economic Impacts. Washington, D.C.: The National Academy Press. doi:10.17226/12507. ISBN 978-0-309-12769-1. 
  5. ↑ 5.0 5.1 Phillips, Dr. Tony (23 July 2014). "Near miss: The solar superstorm of July 2012". NASA. https://science.nasa.gov/science-news/science-at-nasa/2014/23jul_superstorm/. 
  6. ↑ Cliver, E. W.; Svalgaard, L. (2005). "The 1859 solar-terrestrial disturbance and the current limits on extreme space weather activity". Solar Physics 224 (1–2): 407–422. doi:10.1007/s11207-005-4980-z. Bibcode: 2004SoPh..224..407C. http://solwww.oma.be/users/evarob/Literature/Papers/Solar%20Physics/2005%20Cliver%201859%20event%20and%20limits%20of%20extreme%20space%20weather.pdf. Retrieved 16 May 2021. 
  7. ↑ "Near miss: The Solar superstorm of July 2012". 22 July 2014. https://science.nasa.gov/science-news/science-at-nasa/2014/23jul_superstorm/. 
  8. ↑ 8.0 8.1 8.2 "Bracing the satellite infrastructure for a Solar superstorm". Scientific American 299 (2): 80–87. 28 July 2008. doi:10.1038/scientificamerican0808-80. PMID 18666683. http://www.sciam.com/article.cfm?id=bracing-for-a-solar-superstorm. Retrieved 16 February 2011. 
  9. ↑ 9.0 9.1 "Description of a singular appearance seen in the Sun on September 1, 1859". Monthly Notices of the Royal Astronomical Society 20: 13–15. 1859. doi:10.1093/mnras/20.1.13. Bibcode: 1859MNRAS..20...13C. https://babel.hathitrust.org/cgi/pt?id=njp.32101081655332&view=1up&seq=357. 
  10. ↑ "On a curious appearance seen in the Sun". Monthly Notices of the Royal Astronomical Society 20: 15–16. 1859. doi:10.1093/mnras/20.1.15. Bibcode: 1859MNRAS..20...15H. https://babel.hathitrust.org/cgi/pt?id=njp.32101081655332&view=1up&seq=359. 
  11. ↑ Thompson, Richard (24 September 2015). "A solar flare effect". Australian Government Bureau of Meteorology. http://www.ips.gov.au/Educational/3/1/1. 
  12. ↑ Clark, Stuart (2007). The Sun Kings: The unexpected tragedy of Richard Carrington and the tale of how modern astronomy began. Princeton, New Jersey: Princeton University Press. ISBN 978-0-691-12660-9. https://archive.org/details/sunkingsunexpect00clar. 
  13. ↑ The 9 articles by E. Loomis published from November 1859 to July 1862 in the American Journal of Science regarding "The great auroral exhibition", 28 – 4 August September 1859:
  14. ↑ "What if the biggest solar storm on record happened today?". 2 March 2011. http://news.nationalgeographic.com/news/2011/03/110302-solar-flares-sun-storms-earth-danger-carrington-event-science/. 
  15. ↑ Hayakawa, H. (2018). "Low-latitude aurorae during the extreme space weather events in 1859". The Astrophysical Journal 869 (1): 57. doi:10.3847/1538-4357/aae47c. Bibcode: 2018ApJ...869...57H. 
  16. ↑ González-Esparza, J. A.; Cuevas-Cardona, M. C. (2018). "Observations of Low Latitude Red Aurora in Mexico During the 1859 Carrington Geomagnetic Storm". Space Weather 16 (6): 593. doi:10.1029/2017SW001789. Bibcode: 2018SpWea..16..593G. 
  17. ↑ Green, J. (2006). "Duration and extent of the great auroral storm of 1859". Advances in Space Research 38 (2): 130–135. doi:10.1016/j.asr.2005.08.054. PMID 28066122. Bibcode: 2006AdSpR..38..130G. 
  18. ↑ Hayakawa, H. (2016). "East Asian observations of low-latitude aurora during the Carrington magnetic storm". Publications of the Astronomical Society of Japan 68 (6): 99. doi:10.1093/pasj/psw097. Bibcode: 2016PASJ...68...99H. 
  19. ↑ "The Carrington Event: How NZ evaded disaster". 29 December 2024. https://www.rnz.co.nz/news/national/537802/the-carrington-event-how-nz-evaded-disaster. 
  20. ↑ Moreno Cárdenas, Freddy; Cristancho Sánchez, Sergio; Vargas Domínguez, Santiago; Hayakawa, Satoshi; Kumar, Sandeep; Mukherjee, Shyamoli; Veenadhari, B. (2016). "The grand aurorae borealis seen in Colombia in 1859". Advances in Space Research 57 (1): 257–267. doi:10.1016/j.asr.2015.08.026. Bibcode: 2016AdSpR..57..257M. 
  21. ↑ "The Aurora Borealis". Baltimore American and Commercial Advertiser: p. 2, column 2. 3 September 1859. https://news.google.com/newspapers?nid=tCoNjB6AT50C&dat=18590903&printsec=frontpage. 
  22. ↑ Herbert, Count Frank (8 October 1909). "The Great Aurora of 1859". The Daily News (Perth, Western Australia): p. 9. https://trove.nla.gov.au/newspaper/article/77351480. 
  23. ↑ Severe Space Weather Events – Understanding Societal and Economic Impacts: A Workshop Report (Report). National Academies Press. 2008. p. 13. ISBN 978-0-309-12769-1. 
  24. ↑ Odenwald, Sten F. (2002). The 23rd Cycle. Columbia University Press. p. 28. ISBN 978-0-231-12079-1. https://archive.org/details/23rdcyclelearnin00oden. 
  25. ↑ Carlowicz, Michael J.; Lopez, Ramon E. (2002). Storms from the Sun: The emerging science of space weather. National Academies Press. p. 58. ISBN 978-0-309-07642-5. 
  26. ↑ Loomis, Elias et al. (1859). "The great Auroral Exhibition of August 28th to September 4th, 1859". American Journal of Science. 2nd series 28 (84): 385. https://babel.hathitrust.org/cgi/pt?id=uva.x001679510&seq=403. "[...] in more than one case the north and south [telegraph] lines were worked during the daytime of September 3d solely by the atmospheric influence!". 
  27. ↑ Green, James L.; Boardsen, Scott; Odenwald, Sten; Humble, John; Pazamickas, Katherine A. (1 January 2006). "Eyewitness reports of the great auroral storm of 1859" (in en). Advances in Space Research. The Great Historical Geomagnetic Storm of 1859: A Modern Look 38 (2): 145–154. doi:10.1016/j.asr.2005.12.021. ISSN 0273-1177. Bibcode: 2006AdSpR..38..145G. https://www.sciencedirect.com/science/article/pii/S0273117706000160. 
  28. ↑ Hayakawa, Hisashi (2023). "The extreme space weather event of 1872 February: sunspots, magnetic disturbance, and auroral displays". The Astrophysical Journal 959 (23): 23. doi:10.3847/1538-4357/acc6cc. Bibcode: 2023ApJ...959...23H. 
  29. ↑ Carrington-class coronal mass ejection narrowly misses Earth (video). NASA. 28 April 2014. Event occurs at 04:03. Retrieved 26 July 2014 – via YouTube.
  30. ↑ Garofalo, Meredith (2024-05-13). "How a giant sunspot unleashed solar storms that spawned global auroras that just dazzled us all" (in en). https://www.space.com/giant-sunspot-ar3664-solar-storms-aurora. 
  31. ↑ Hudson, Hugh S. (2021). "Carrington Events". Annual Review of Astronomy and Astrophysics 59: 445–477. doi:10.1146/annurev-astro-112420-023324. ISSN 0066-4146. Bibcode: 2021ARA&A..59..445H. 
  32. ↑ 32.0 32.1 Battersby, Stephen (19 November 2019). "Core concept: What are the chances of a hazardous solar superflare?" (in en). Proceedings of the National Academy of Sciences 116 (47): 23368–23370. doi:10.1073/pnas.1917356116. ISSN 0027-8424. PMID 31744927. Bibcode: 2019PNAS..11623368B. 
  33. ↑ Crockett, Christopher (17 September 2021). "Are we ready? Understanding just how big solar flares can get". Knowable Magazine. doi:10.1146/knowable-091721-1. https://knowablemagazine.org/article/physical-world/2021/understanding-just-how-big-solar-flares-can-get. Retrieved 30 September 2021. 
  34. ↑ Paleari, Chiara I.; F. Mekhaldi; F. Adolphi; M. Christl; C. Vockenhuber; P. Gautschi; J. Beer; N. Brehm et al. (2022). "Cosmogenic radionuclides reveal an extreme solar particle storm near a solar minimum 9125 years BP". Nat. Commun. 13 (214): 214. doi:10.1038/s41467-021-27891-4. PMID 35017519. Bibcode: 2022NatCo..13..214P. 
  35. ↑ 35.0 35.1 Wolff, E. W.; Bigler, M.; Curran, M. A. J.; Dibb, J.; Frey, M. M.; Legrand, M. (2012). "The Carrington event not observed in most ice core nitrate records". Geophysical Research Letters 39 (8): 21, 585, 598. doi:10.1029/2012GL051603. Bibcode: 2012GeoRL..39.8503W. https://scholars.unh.edu/cgi/viewcontent.cgi?article=1218&context=earthsci_facpub. 
  36. ↑ McCracken, K. G.; Dreschhoff, G. A. M.; Zeller, E. J.; Smart, D. F. (2001). "Solar cosmic ray events for the period 1561–1994 – 1. Identification in polar-ice, 1561–1950". Journal of Geophysical Research 106 (A10): 21, 585, 598. doi:10.1029/2000JA000237. Bibcode: 2001JGR...10621585M. 
  37. ↑ Duderstadt, K. A. (2014). "Nitrate deposition to surface snow at Summit, Greenland, following the 9 November 2000 solar proton event". Journal of Geophysical Research: Atmospheres 119 (11): 6938–6957. doi:10.1002/2013JD021389. Bibcode: 2014JGRD..119.6938D. https://scholars.unh.edu/cgi/viewcontent.cgi?article=1019&context=earthsci_facpub. 
  38. ↑ Mekhaldi, F.; McConnell, J. R.; Adolphi, F.; Arienzo, M. M.; Chellman, N. J.; Maselli, O. J. et al. (November 2017). "No coincident nitrate enhancement events in polar ice cores following the largest known Solar storms". Journal of Geophysical Research: Atmospheres 122 (21): 11, 900–911, 913. doi:10.1002/2017JD027325. Bibcode: 2017JGRD..12211900M. 
  39. ↑ Beggan, C. D.; Clarke, E.; Lawrence, E.; Eaton, E.; Williamson, J.; Matsumoto, K.; Hayakawa, H. (29 February 2024). "Digitized Continuous Magnetic Recordings for the August/September 1859 Storms From London, UK". Space Weather 22 (3). doi:10.1029/2023SW003807. ISSN 1542-7390. Bibcode: 2024SpWea..2203807B. 
  40. ↑ Luntz, Stephen (2024-03-25). "History's Biggest Solar Storm, The Carrington Event, Was Even Bigger Than We Realized". https://www.iflscience.com/historys-biggest-solar-storm-the-carrington-event-was-even-bigger-than-we-realized-73527. 

Further reading



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