Download original image
The colour index dependence on the Mg II index and time. Date is represented by the colour bar (shown on the right). Data points for November 2012, August, September, October and November 2013 and January 2014 are not shown, as SSI data is not available for these months. Note that the strong correlation between the [FUV-MUV] colour and the Mg II index shows two slightly different slopes, corresponding to the descending phase of solar cycle 23 and to the rising phase of solar cycle 24.
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.