Fig. A.1

Snapshot from the STEREO-A movie available online. Left: EUVI He ii 304 Å image acquired by STEREO-A on August 31, 2007, 21:01:15 UT showing the prominence eruption on the southwest limb. Right: superposition between the same EUVI frame shown on the left and the COR1 image acquired at 21:00:09 UT. Each COR1 image in the movie is a base difference between the actual frame and the one acquired at 19:55:09 UT on the same day.
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