Open Access

Fig. 5


Download original image

Modulus of the cross-coherence between three proxies (F10.7, MgII and SEM) and F30 (a), and F10.7 (b). Coloured bands correspond to a ±σ confidence interval. The 27-day and 13.5-day periods are indicated by dashed lines. The time intervals used for estimating the cross-coherence are proxy-dependent: solar cycles 20–24 for radio proxies, cycles 21–24 for the MgII index, and cycles 23 and 24 only for SEM. For that reason, the different cross-coherences are not strictly comparable.

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.