Astronomy:Solar cycle 12

From HandWiki
Solar cycle 12
PSM V31 D507 The sun on september 1 1883.jpg
Sunspots recorded during solar cycle 12 (1 September 1883).
Sunspot data
Start dateDecember 1878
End dateMarch 1890
Duration (years)11.3
Max count124.4
Max count monthDecember 1883
Min count3.7
Spotless days736
Cycle chronology
Previous cycleSolar cycle 11 (1867-1878)
Next cycleSolar cycle 13 (1890-1902)

Solar cycle 12 was the twelfth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] The solar cycle lasted 11.3 years, beginning in December 1878 and ending in March 1890. The maximum smoothed sunspot number observed during the solar cycle was 124.4 (December 1883), and the starting minimum was 3.7.[3] During the minimum transit from solar cycle 12 to 13, there were a total of 736 days with no sunspots.[4][5][6]

1882

A very bright blood-red aurora display happened over New York on 16 April 1882, while significant communication disturbances occurred.[7] A geomagnetic storm later in that year produced the aurora of November 17, 1882.

See also

References

  1. Kane, R.P. (2002), "Some Implications Using the Group Sunspot Number Reconstruction", Solar Physics 205 (2): 383–401, doi:10.1023/A:1014296529097, Bibcode2002SoPh..205..383K 
  2. "The Sun: Did You Say the Sun Has Spots?". Space Today Online. http://www.spacetoday.org/SolSys/Sun/Sunspots.html. Retrieved 12 August 2010. 
  3. SIDC Monthly Smoothed Sunspot Number. "[1]"
  4. Spotless Days. "[2]"
  5. Dr. Tony Phillips (11 July 2008). "What's Wrong with the Sun? (Nothing)". NASA. https://science.nasa.gov/headlines/y2008/11jul_solarcycleupdate.htm. 
  6. Solaemon's Spotless Days Page. "[3]"
  7. Storms, Solar (28 July 2017). "Space Weather Newspaper Archives". http://www.solarstorms.org/SRefStorms.html.