Free Access

Fig. 4


Number of small (black line, U+P  ≤  17msh AND U+P/U  ≤  7) and large individual spots (red line, U+P  >  17msh OR U+P/U  >  7) during cycles 22 and 23. The monthly average sunspot counts were smoothed with a one-year running mean and are given with corresponding error bars.

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.