Fig. 1
Region around the tornado on 25 September 2011: a) EUVI-A 195 Å; b) AIA 171 Å images. On the EUVI image, the black dashed line shows the position of the AIA limb, and the long diagonal arrow is the epipolar line for the prominence position marked with + on the AIA image. The orange dashed line outlines the position of the southern edge of the active region (AR) corona.
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