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Massive prominence eruption seen by STEREO Ahead


A massive prominence is shown erupting in this movie made of combined EUVI and COR1 images from the STEREO Ahead spacecraft. In orange is the Sun as seen in the emission line of helium at 304 Angstroms. Prominences emit strongly at this wavelength, and are clearly visible at various locations around the rim, in particular the massive one in the lower-left limb at the start of the movie. At higher heights above the limb, images taken by the COR1 inner coronagraph are shown in green. At the beginning of the movie, a small but rapid eruption can be seen near the top. This eruption may have been the final trigger for the eruption of the eruption of the prominence, which was close to erupting in any case.

Last Revised: March 19, 2018 15:00:39 UTC
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