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.


Data Source:
Worldwide ground-based solar observations; Sunspot group positions are taken from Locarno drawings.

Link to the Sunspot Cycle page (SILSO)