Solar cycle 14 explained

Cycle Num:14
Start Date:January 1902
End Date:July 1913
Duration:11.5
Max Count:107.1
Max Count Date:February 1906
Min Count:4.5
Spotless Count:1023
Prev Name:Solar cycle 13
Next Name:Solar cycle 15
Prev Dates:1890–1902
Next Dates:1913–1923

Solar cycle 14 was the fourteenth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1] The solar cycle lasted 11.5 years, beginning in January 1902 and ending in July 1913. The maximum smoothed sunspot number observed during the solar cycle was 107.1, in February 1906 (the lowest since the Dalton Minimum), and the starting minimum was 4.5.[2] During the minimum transit from solar cycle 14 to 15, there were a total of 1023 days with no sunspots (the second highest recorded of any cycle to date).[3] [4] [5]

Geomagnetic storms in November 1903, March 1905, and September 1909 affected telegraph lines.[6]

See also

Notes and References

  1. Web site: The Sun: Did You Say the Sun Has Spots? . Space Today Online . 12 August 2010.
  2. SIDC Monthly Smoothed Sunspot Number. "http://sidc.oma.be/sunspot-data/"
  3. Spotless Days. "http://spaceweather.com/glossary/spotlessdays.htm?PHPSESSID=dli444kmrjgre0rjq6l86fv144"
  4. Web site: What's Wrong with the Sun? (Nothing). https://web.archive.org/web/20080714032353/https://science.nasa.gov/headlines/y2008/11jul_solarcycleupdate.htm. dead. 14 July 2008. 11 July 2008. Dr. Tony Phillips. NASA.
  5. Solaemon's Spotless Days Page. "http://users.telenet.be/j.janssens/Spotless/Spotless.html"
  6. Web site: Space Weather Newspaper Archives. Solar. Storms. 28 July 2017. www.solarstorms.org.