Open Access

Fig. 1


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Original values of F30 and F10.7 since 1 March 1957, when the F30 series starts. (a) Full record, and (b) a two-year excerpt with the Halloween event of October 2003.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.