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Display solar activity forecast for next 27 days, display A-index, Sunspot Numbers and Flux forecast including graphs for solar activity and geomagnetic forecast. All forecasts are updated daily.

Definition of smoothed sunspot number and R12 index

Real-time solar activity page at SpaceWeatherLive.com display sunspot regions, indicating sunspot numbers of with manitude class, Solar Flares and a list of daily events on the sun.

The yearly, black, up to 1750, and monthly red, from 1750 up to now, sunspot numbers provided by the Royal Observatory of Belgium SILSO