List of solar cycles

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The following is a list of solar cycles (sometimes called sunspot cycles), tracked since 1755.[1][2][3]

Cycle Started Finished Duration (years) Maximum (monthly SSN (Smoothed Sunspot Number))[4] Minimum (monthly SSN; end of cycle)[5][6] Spotless days (end of cycle)[7][8][9]
Solar cycle 1 1755 March 1766 June 11.3 86.5 (June 1761) 11.2
Solar cycle 2 1766 June 1775 June 9.0 115.8 (Sep 1769) 7.2
Solar cycle 3 1775 June 1784 September 9.3 158.5 (May 1778) 9.5
Solar cycle 4 1784 September 1798 May 13.7 141.2 (Feb 1788) 3.2
Solar cycle 5 1798 May 1810 December 12.6 49.2 (Feb 1805) 0.0
Solar cycle 6 1810 December 1823 May 12.4 48.7 (May 1816) 0.1
Solar cycle 7 1823 May 1833 November 10.5 71.5 (Nov 1829) 7.3
Solar cycle 8 1833 November 1843 July 9.8 146.9 (Mar 1837) 10.6
Solar cycle 9 1843 July 1855 December 12.4 131.9 (Feb 1848) 3.2 ~654
Solar cycle 10 1855 December 1867 March 11.3 98.0 (Feb 1860) 5.2 ~406
Solar cycle 11 1867 March 1878 December 11.8 140.3 (Aug 1870) 2.2 ~1028
Solar cycle 12 1878 December 1890 March 11.3 74.6 (Dec 1883) 5.0 ~736
Solar cycle 13 1890 March 1902 February 11.9 87.9 (Jan 1894) 2.7 ~938
Solar cycle 14 1902 February 1913 August 11.5 64.2 (Feb 1906) 1.5 ~1019
Solar cycle 15 1913 August 1923 August 10.0 105.4 (Aug 1917) 5.6 534
Solar cycle 16 1923 August 1933 September 10.1 78.1 (Apr 1928) 3.5 568
Solar cycle 17 1933 September 1944 February 10.4 119.2 (Apr 1937) 7.7 269
Solar cycle 18 1944 February 1954 April 10.2 151.8 (May 1947) 3.4 446
Solar cycle 19 1954 April 1964 October 10.5 201.3 (Mar 1958) 9.6 227
Solar cycle 20 1964 October 1976 June 11.7 110.6 (Nov 1968) 12.2 272
Solar cycle 21 1976 June 1986 September 10.3 164.5 (Dec 1979) 12.3 273
Solar cycle 22 1986 September 1996 May 9.7 158.5 (Jul 1989) 8.0 309
Solar cycle 23 1996 May 2008 January [10] 11.7 120.8 (Mar 2000) 1.7 821 [11]
Solar cycle 24 2008 January [10]
Mean 11.1 114.1 5.8

References[edit]

  1. ^ Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
  2. ^ "Did You Say the Sun Has Spots?". Space Today Online.
  3. ^ Phillips, A. (2008). "Solar Cycle 24 Begins". Science @ NASA.
  4. ^ SIDC Monthly Smoothed Sunspot Number. "[1]"
  5. ^ Monthly solar cycle data. "[2]"
  6. ^ Solar Cycle Progression: Recent Solar Indices. "[3]"
  7. ^ Spotless Days. "[4]"
  8. ^ What's Wrong with the Sun? (Nothing) more information: Spotless Days. "[5]"
  9. ^ Solaemon's Spotless Days Page. "[6]"
  10. ^ a b Recent Solar Indices. "[7]"
  11. ^ Spotless days. "[8]"

External links[edit]