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:
A cloud of plasma or "CME" raced away from the blast site at 1100 km/s. The CME is not heading for Earth. It is, however, heading for Mercury and Venus.