Astronomy:Solar cycle 13

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Solar cycle 13
PSM V60 D257 Solar corona of 1893 eclipse.png
The solar corona during an eclipse in solar cycle 13 (1893).
Sunspot data
Start dateMarch 1890
End dateJanuary 1902
Duration (years)11.8
Max count146.5
Max count monthJanuary 1894
Min count8.3
Spotless days934
Cycle chronology
Previous cycleSolar cycle 12 (1878–1890)
Next cycleSolar cycle 14 (1902–1913)
Solar prominences during an eclipse in solar cycle 13 (28 May 1900).

Solar cycle 13 was the thirteenth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] The solar cycle lasted 11.8 years, beginning in March 1890 and ending in January 1902. The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 146.5 (January 1894), and the starting minimum was 8.3.[3] During the minimum transit from solar cycle 13 to 14, there were a total of 934 days with no sunspots.[4][5][6]

There were a number of intense solar proton events during solar cycle 13,[7] as well as geomagnetic storms such as in September 1898 which affected telegraph lines.[8]

See also


  1. Kane, R.P. (2002), "Some Implications Using the Group Sunspot Number Reconstruction", Solar Physics 205 (2): 383–401, doi:10.1023/A:1014296529097, Bibcode2002SoPh..205..383K 
  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. Spotless Days. "[2]"
  5. Dr. Tony Phillips (11 July 2008). "What's Wrong with the Sun? (Nothing)". NASA. 
  6. Solaemon's Spotless Days Page. "[3]"
  7. Peristykh, A. N.; Damon, P. E. (17–25 August 1999). "Multiple Evidence of Intense Solar Proton Events During Solar Cycle 13". Proceedings of the 26th International Cosmic Ray Conference. pp. 264–267. 
  8. Storms, Solar (28 July 2017). "Space Weather Newspaper Archives". 

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