Solar cycle 8

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 date	November 1833
End date	July 1843
Duration (years)	9.7
Max count	244.9
Max count month	March 1837
Min count	12.2
Cycle chronology
Previous cycle	Solar cycle 7 (1823–1833)
Next cycle	Solar cycle 9 (1843–1855)

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

See also

• List of solar cycles

References

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. ""
4. Claudio Vita-Finzi. Solar History: An Introduction, p. 4, Springer, 2012 ISBN 9400742959.