AR1339, is one of the biggest sunspots in many years. The active region rotated over the sun's eastern limb two days ago and now it is turning toward Eart
Sunspot 1339 poses a growing threat for X-class solar flares. Credit: SDO/HMI |
The sunspot has already unleashed one X-flare on Nov. 3rd around 2027 UT. A movie from NASA's Solar Dynamics Observatory shows the extreme ultraviolet flash:
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