Division of the sunspot into umbral, penumbral, and lightbridge areas. Red and blue contours in both panels encircle umbral and penumbral areas, which are used to compare the magnetic field vector retrieved in the photosphere and upper chromosphere. The area within the black contour in the left panel represents the lightbridge. The left and right panels correspond to the observations recorded on 14 and 16 November 2010, respectively.
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.