Solar cycle 14
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Solar cycle 14 was the fourteenth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] The solar cycle lasted 11.5 years, beginning in February 1902 and ending in August 1913. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 64.2, in February 1906 (the lowest since the Dalton Minimum), and the minimum was 1.5.[3] There were a total of approximately 1019 days with no sunspots during this cycle (the second highest recorded of any cycle to date).[4][5][6]
Geomagnetic storms in November 1903, March 1905, and September 1909 affected telegraph lines.[7]
See also
References
- ^ Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
- ^ "The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010.
- ^ SIDC Monthly Smoothed Sunspot Number. "[1]"
- ^ Spotless Days. "[2]"
- ^ What's Wrong with the Sun? (Nothing) more information: Spotless Days. "[3]"
- ^ Solaemon's Spotless Days Page. "[4]"
- ^ http://www.solarstorms.org/SRefStorms.html