Fig. 3

Evolution of the filaments in the north part of AR 12035 between 2014 April 15 and 16 in AIA 304 Å. We note the north-south filament on April 15 at 09:15 UT and the upside-down U filament at 17:00 UT. A sigmoidal filament is formed on April 16. The FOV corresponds to the black box in Fig. 2. The temporal evolution is shown in Movie 2 (available online).
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