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Solar cycle 2

FieldValue
imageWilson effect original.jpg
captionDrawing of a sunspot from 1774, illustrating the Wilson effect
cycle_num2
start_dateJune 1766
end_dateJune 1775
duration9
max_count193.0
max_count_dateSeptember 1769
min_count18.6
prev_nameSolar cycle 1
prev_dates1755–1766
next_nameSolar cycle 3
next_dates1775–1784

Solar cycle 2 was the second solar cycle since 1755, when extensive recording of sunspot activity began. The solar cycle lasted 9 years, beginning in June 1766 and ending in June 1775. The maximum smoothed sunspot number observed during the solar cycle was 193.0 (September 1769), and the starting minimum was 18.6.

Sunspot observations by Alexander Wilson during this period established the Wilson effect.

References

References

  1. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics.
  2. "The Sun: Did You Say the Sun Has Spots?". Space Today Online.
  3. "SIDC Monthly Smoothed Sunspot Number".
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This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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