Fig. 1.

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Core dimming and brightenings. The core dimming in the southeast part of the erupting region as observed in the AIA 211 Å passband is depicted in panel a. The region bounded by the red rectangle in panel a is shown in panel b. The core dimming area is marked by the red dotted contour in panel b. An observation of the active region in the AIA 1600 Å passband is shown in panel c. Brightenings associated with the flare ribbons are marked by the blue contours. The radial component of the HMI vector magnetic field is plotted in grey scale with saturation values ±1000 G in panel d. The blue contours in panel d are the same as those plotted in panel c. The red contour in panel d denotes the boundary of the core dimming as marked in panel b.
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