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STEREO Observing AR903 - Dec. 4, 2006


A close up of loops in a magnetic active region. These loops, observed by STEREO's SECCHI/EUVI telescope, are at a million degrees K. This powerful active region, AR903, observed here on Dec. 4, 2006, produced a series of intense flares, particle storms, and coronal mass ejections over the next few days.

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