Solar cycle 13

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Solar cycle 13
The solar corona during an eclipse in solar cycle 13 (1893).
Sunspot Data
Start date March 1890
End date February 1902
Duration (years) 11.9
Max count 87.9
Max count month January 1894
Min count 2.7
Spotless days 936
Cycle chronology
Previous cycle Solar cycle 12 (1878-1890)
Next cycle Solar 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 11.9 years, beginning in March 1890 and ending in February 1902. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 87.9 (January 1894), and the minimum was 2.7.[3] There were a total of approximately 938 days with no sunspots during this cycle.[4][5][6]

There were a number of intense solar proton events during solar cycle 13.[7] For example, a geomagnetic storm in September 1898 affected telegraph lines.[8]

See also[edit]

References[edit]

  1. ^ Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
  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. ^ What's Wrong with the Sun? (Nothing) more information: Spotless Days. "[3]"
  6. ^ Solaemon's Spotless Days Page. "[4]"
  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. ^ http://www.solarstorms.org/SRefStorms.html