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Uploaded on Aug 4, 2011
On August 4 at 03:57 UT, the Sun's surface exploded with an M9.5 flare, somewhat more energetic than the one earlier this week. It also blew out a coronal mass ejection - a wave of subatomic particles - and that is expected to interact with the Earth's magnetic field on Friday. We may get aurorae from it!
[Note: on the video I said it was August 3: it was, in my time zone! Sorry for any confusion.]