Pick of The Week
 
 

One Spot, Many Flares (September 23 2005)


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From the day before it rotated into view until it rotated out of view about 2 weeks later, Active Region 808, an over-achiever if ever there was one, spouted off nine X-class flares (the largest kind). The largest was an X17 flare on September 7, the fifth largest recorded.

The still image shows shows a coronal mass ejection (CME) associated with one of the large flares as it blasted charged particles into space. The video clip shows activity from September 9 - 14 during which at least 4 flares can be seen in the LASCO C3 coronagraph. The white circle represents the size of the Sun, which is hidden by the blue occulting disk so that activity in the faint corona can be observed. The flurry of white streaks and blips seen during the first half of the clip are where the coronagraph's detector was hit by protons accelerated by the flare and CME that occurred just before the movie begins.

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