Open Access

Fig. 7.

image

Observations of flare ribbons and their hooks in two X-class flares of July 12, 2012 and September 10, 2014. Panels a and b: context images observed in AIA 304 Å during the impulsive phases of each flare. Positive and negative polarity ribbons are labeled PR and NR respectively, and their respective hooks are labeled PRH and NRH. Panels c and d: zoom-ins of the NRH at three different times, shown by blue, green, and red colors, respectively. We note that in panel d, the IRIS/SJI 1400 Å images are shown rather than AIA 304 Å, due to their higher spatial resolution. Panels e and f: manually traced-out ribbon locations (dashed colored lines) at times corresponding to panels c and d.

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.