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 9.8 years, beginning in November 1833 and ending in July 1843. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 146.9 (March 1837), and the minimum was 10.6.^[3]

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

See also

• Solar variation
• List of solar cycles

References

Solar cycles 18th century Solar cycle 1 (1755 March – 1766 June) Solar cycle 2 (1766 June – 1775 June) Solar cycle 3 (1775 June – 1784 September) Solar cycle 4 (1784 September – 1798 May) Solar cycle 5 (1798 May – 1810 December) 19th century Solar cycle 6 (1810 December – 1823 May) Solar cycle 7 (1823 May – 1833 November) Solar cycle 8 (1833 November – 1843 July) Solar cycle 9 (1843 July – 1855 December) Solar cycle 10 (1855 December – 1867 March) Solar cycle 11 (1867 March – 1878 December) Solar cycle 12 (1878 December – 1890 March) Solar cycle 13 (1890 March – 1902 February) 20th century Solar cycle 14 (1902 February – 1913 August) Solar cycle 15 (1913 August – 1923 August) Solar cycle 16 (1923 August – 1933 September) Solar cycle 17 (1933 September – 1944 February) Solar cycle 18 (1944 February – 1954 April) Solar cycle 19 (1954 April – 1964 October) Solar cycle 20 (1964 October – 1976 June) Solar cycle 21 (1976 June – 1986 September) Solar cycle 22 (1986 September – 1996 May) Solar cycle 23 (1996 May – 2008 January) 21st century Solar cycle 24 (2008 January – present) List of solar cycles