Fig. 5.
Evolution of the corona in AIA 171 Å from 6 to 1 day before the studied eruption. A sheared loop built up in the AR core from 24 to 28 February (green and blue arrows in panels a–e). The purple arrows point to large scale loops of the AR (a–e) which become open, or at least large scale in panel f. The location of the filament is displayed in panels d and e with a red contour.
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