Free Access
Fig. 3

Hα BBSO synoptic images with a field-of-view covering NOAA 08237. Left: a filament is visible lying along the magnetic neutral line. Right: the upper part of the filament has disappeared leaving a small undisturbed part. The image is de-rotated to the time of the image taken on June 12.
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.