The estimated international sunspot number (EISN) is a daily value obtained by a simple average over available sunspot counts from prompt stations in the SILSO network. Time range: current month. Data description: Daily estimation of the Sunspot Number
Nb Data = Total Number of observations received at SILSO Nb Valid Data = Total number of observations taken into account for calculating the EISN Current average = Current average of the Sunspot Number EISN : Estimated International Sunspot Number.
