XX - Two X Flares in Quick Succession
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XX - Two X Flares in Quick Succession

June 12, 2014
A powerful active region just rotating into view produced two X-class flares (the strongest category) about an hour apart on June 9, 2014. An X-2.3 flare peaked at 11:52 UT followed by an X-1.5 flare at 12:52 UT. The AIA video, which covers about 4 hours of activity, shows the event in the 131 Angstrom wavelength of extreme ultraviolet light. This measures plasmas heated up to 10 million degrees K in the flare. The still shows the first of the two flares. The same active region produced another X class flare and a medium (M-class) flare the following day. Credit: Solar Dynamics Observatory/NASA.

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