Wednesday, August 4, 2010

CME hits Earth and causes a moderate geomagnetic storm

The coronal mass ejection from August 1 hit the Earth at 1740 UT on August 3. It caused a moderate geomagnetic storm resulting in beautiful auroral displays. This photo was taken by Tony Wilder of Chippewa Falls, WI. A second eruption may hit Earth in the next two days, perhaps causing more geomagnetic activity.