Solar Cycles
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Revision as of 12:49, 23 November 2017 by Iceagefarmer (talk | contribs)
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In table underneath, the number of spotless days is the number between the maximum of the previous solar cycle and the maximum of the new solar cycle. As an example, there were 817 spotless days during the transit from solar cycle 23 to solar cycle 24.
| Solar Cycle | Start | Smoothed minimum ISN | Maximum | Smoothed maximum ISN | Time of Rise (years) | Duration (years) | Spotless days |
|---|---|---|---|---|---|---|---|
| Solar cycle 1 | 1755 February | 14.0 | 1761 June | 144.1 | 6.3 | 11.3 | |
| Solar cycle 2 | 1766 June | 18.6 | 1769 September | 193.0 | 3.3 | 9.0 | |
| Solar cycle 3 | 1775 June | 12.0 | 1778 May | 264.3 | 2.9 | 9.3 | |
| Solar cycle 4 | 1784 September | 15.9 | 1788 February | 235.3 | 3.4 | 13.6 | |
| Solar cycle 5 | 1798 April | 5.3 | 1805 February | 82.0 | 6.8 | 12.3 | |
| Solar cycle 6 | 1810 August | 0.0 | 1816 May | 81.2 | 5.8 | 12.8 | |
| Solar cycle 7 | 1823 May | 0.2 | 1829 November | 119.2 | 6.5 | 10.5 | |
| Solar cycle 8 | 1833 November | 12.2 | 1837 March | 244.9 | 3.3 | 9.7 | |
| Solar cycle 9 | 1843 July | 17.6 | 1848 February | 219.9 | 4.6 | 12.4 | |
| Solar cycle 10 | 1855 December | 6.0 | 1860 February | 186.2 | 4.2 | 11.3 | 655 |
| Solar cycle 11 | 1867 March | 9.9 | 1870 August | 234.0 | 3.4 | 11.8 | 406 |
| Solar cycle 12 | 1878 December | 3.7 | 1883 December | 124.4 | 5.0 | 11.3 | 1028 |
| Solar cycle 13 | 1890 March | 8.3 | 1894 January | 146.5 | 3.8 | 11.8 | 736 |
| Solar cycle 14 | 1902 January | 4.5 | 1906 February | 107.1 | 4.1 | 11.5 | 934 |
| Solar cycle 15 | 1913 July | 2.5 | 1917 August | 175.7 | 4.1 | 10.1 | 1023 |
| Solar cycle 16 | 1923 August | 9.4 | 1928 April | 130.2 | 4.7 | 10.1 | 534 |
| Solar cycle 17 | 1933 September | 5.8 | 1937 April | 198.6 | 3.6 | 10.4 | 568 |
| Solar cycle 18 | 1944 February | 12.9 | 1947 May | 218.7 | 3.3 | 10.2 | 269 |
| Solar cycle 19 | 1954 April | 5.1 | 1958 March | 285.0 | 3.9 | 10.5 | 446 |
| Solar cycle 20 | 1964 October | 14.3 | 1968 November | 156.6 | 4.1 | 11.4 | 227 |
| Solar cycle 21 | 1976 March | 17.8 | 1979 December | 232.9 | 3.8 | 10.5 | 272 |
| Solar cycle 22 | 1986 September | 13.5 | 1989 November | 212.5 | 3.2 | 9.9 | 273 |
| Solar cycle 23 | 1996 August | 11.2 | 2001 November | 180.3 | 5.3 | 12.3 | 309 |
| Solar cycle 24 | 2008 December | 2.2 | 2014 April | 116.4 | 5.3 | In progress | 817 |
| Solar cycle 25 | First spot[1] | 51 | |||||
| Average | 9.3 | 178.7 | 4.4 | 11.04 |
