Free Access

Fig. 12


Structural similarity index SSIM of the forecast against the cycle strength, as given by the Monthly Group Maximum sunspot number (Hathaway 2015b). The results show that the method is most effective for medium cycles. We did not include attempts to forecast cycles 11 to 14 since the method requires enough past data, according to the auto-calibrated parameters J and L; to forecast these cycles with this method we would need data prior to 1874.

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.