Yearly mean total sunspot number

  • Provider: SILSO
  • Source URL: http://sidc.oma.be/silso/infossntotyearly
  • Catalog: Yearly from 1700 to 2014
  • Localized to: English
  • Description:

    Yearly mean total sunspot number obtained by taking a simple arithmetic mean of the daily total sunspot number over all days of each year. (NB: in early years in particular before 1749, the means are computed on only a fraction of the days in each year because on many days, no observation is available).

  • Dimensions