What the Sunspot Record Tells Us About Space Climate

  title={What the Sunspot Record Tells Us About Space Climate},
  author={D. Hathaway and R. Wilson},
  journal={Solar Physics},
  • D. Hathaway, R. Wilson
  • Published 2004
  • Physics
  • Solar Physics
  • The records concerning the number, sizes, and positions of sunspots provide a direct means of characterizing solar activity over nearly 400 years. Sunspot numbers are strongly correlated with modern measures of solar activity including: 10.7-cm radio flux, total irradiance, X-ray flares, sunspot area, the baseline level of geomagnetic activity, and the flux of galactic cosmic rays. The Group Sunspot Number provides information on 27 sunspot cycles, far more than any of the modern measures of… CONTINUE READING
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