Open Access

Fig. 4


Download original image

PCN index displayed in top field. Auroral electrojet indices AU, AL, and AE and SuperMag SMU and SML indices in second and third field. Next lower fields display recordings of the variations in the horizontal geomagnetic component counted positive when northward for a series of observatories ordered from top at decreasing latitudes. The black triangle marks HV power line disruption.

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.