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Active region AR NOAA 12736 observed with AIA on March 22, 2019. Left panel: full disk in 304 Å. The blue box (field of view of the right panels) contains the only AR that is visible on the disk on that day. Right panels (a, b, c): AR in different AIA filters, in 94 Å, 1700 Å, and 304 Å superimposed with the contours of the magnetic field of strength ±300 Gauss. Panel d: magnetic field observed with HMI. The bipole (small circle in panels b and d) is responsible for the reconnection. The mini flare is indicated by an arrow in panel c. The box in panel a is the field of view of Fig. 2.
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