Solar cycle 13 explained
| Cycle Num: | 13 |
| Start Date: | March 1890 |
| End Date: | January 1902 |
| Duration: | 11.8 |
| Max Count: | 146.5 |
| Max Count Date: | January 1894 |
| Min Count: | 8.3 |
| Spotless Count: | 934 |
| Prev Name: | Solar cycle 12 |
| Next Name: | Solar cycle 14 |
| Prev Dates: | 1878–1890 |
| Next Dates: | 1902–1913 |
Solar cycle 13 was the thirteenth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1] The solar cycle lasted 11.8 years, beginning in March 1890 and ending in January 1902. The maximum smoothed sunspot number observed during the solar cycle was 146.5 (January 1894), and the starting minimum was 8.3.[2] During the minimum transit from solar cycle 13 to 14, there were a total of 934 days with no sunspots.[3] [4] [5]
There were a number of intense solar proton events during solar cycle 13,[6] as well as geomagnetic storms such as in September 1898 which affected telegraph lines.[7]
See also
Notes and References
- Web site: The Sun: Did You Say the Sun Has Spots? . Space Today Online . 12 August 2010.
- SIDC Monthly Smoothed Sunspot Number. "http://sidc.oma.be/sunspot-data/"
- Spotless Days. "http://spaceweather.com/glossary/spotlessdays.htm?PHPSESSID=dli444kmrjgre0rjq6l86fv144"
- Web site: What's Wrong with the Sun? (Nothing). 11 July 2008. Dr. Tony Phillips. NASA. https://web.archive.org/web/20080714032353/https://science.nasa.gov/headlines/y2008/11jul_solarcycleupdate.htm. 14 July 2008.
- Solaemon's Spotless Days Page. "http://users.telenet.be/j.janssens/Spotless/Spotless.html"
- Peristykh . A. N. . Damon. P. E. . 17–25 August 1999 . Multiple Evidence of Intense Solar Proton Events During Solar Cycle 13 . 26th International Cosmic Ray Conference (Icrc26) . 6 . Proceedings of the 26th International Cosmic Ray Conference . 264–267 . 1999ICRC....6..264P .
- Web site: Space Weather Newspaper Archives. Solar. Storms. 28 July 2017. www.solarstorms.org.
