Solar cycle 8 was the eighth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] The solar cycle lasted 9.7 years, beginning in November 1833 and ending in July 1843. The maximum smoothed sunspot number observed during the solar cycle was 244.9 (March 1837), and the starting minimum was 12.2.[3]

Solar cycle 8
Sunspot data
Start dateNovember 1833
End dateJuly 1843
Duration (years)9.7
Max count244.9
Max count monthMarch 1837
Min count12.2
Cycle chronology
Previous cycleSolar cycle 7 (1823–1833)
Next cycleSolar cycle 9 (1843–1855)

Solar cycle 8 ended in 1843, the year that Heinrich Schwabe discovered the sunspot cycle.[4]

See also

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References

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  1. ^ Kane, R.P. (2002), "Some Implications Using the Group Sunspot Number Reconstruction", Solar Physics, 205 (2): 383–401, Bibcode:2002SoPh..205..383K, doi:10.1023/A:1014296529097
  2. ^ "The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010.
  3. ^ SIDC Monthly Smoothed Sunspot Number. "[1]"
  4. ^ Claudio Vita-Finzi. Solar History: An Introduction, p. 4, Springer, 2012 ISBN 9400742959.