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Fig. 2

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Filament eruption and flare ribbon seen in Hα+ 0.8 Å. Larger black arrows indicate the footpoints of the filament where down-flows are observed (at 16:11 UT). Three kernels (K1, K2, and K3) are noted on the images at 15:59 UT, 16:09 UT, and 16:11 UT, respectively. The ribbons (R1, R2, and R2) are shown with arrows in the images at 15:59 UT and 16:11 UT. The white box in the image at 16:09 UT indicates the region used to produce the time-slice plot in Fig. 4. The white arrow at 16:16:09 UT marks the top of the falling back filament ropes (or part of it). Contour plots of HMI magnetogram are shown in images at 16:07:11 UT and 16:09:15 UT (yellow: −300 Mx cm-2, blue: 300 Mx cm-2).

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