The Bad Astronomer writes "The sunspot cluster that erupted in a solar flare and coronal mass ejection last Monday burst into life again on Friday, blasting out an X2 class solar flare, twice as energetic as the last one. This one was on the Sun's limb and was pointed away from us, so we're in no danger; all we got was a very minor radiation storm that's on the lowest ranking of such things. But it did put on quite a light show, which you can see in a video created with images from NASA's Solar Dynamics Observatory."
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