Solar Cycle

Sunspot Cycle page Area: Global Cadence: Monthly

Product Description: Time-series plots of the sunspot cycle: past and predicted sunspot number, overview of past solar cycles, butterfly diagram, hemispheric sunspot numbers. Target Users: Longterm planning for the overall space weather community (satellites, radio communication, electric power industry,…); solar research. Status: Operational Data Source: Worldwide ground-based solar observations; Sunspot group positions are taken from Locarno drawings.

Link to the Sunspot Cycle page (SILSO)