Beautiful red Aurora
Thursday, October 27, 2011 - 08:31
in Astronomy & Space
(PhysOrg.com) -- A coronal mass ejection (CME) shot off the sun late in the evening of October 21 and hit Earth on October 24 at about 2 PM ET. The CME caused strong magnetic field fluctuations near Earth's surface technically, this level of magnetic fluctuation rated a 7 out of 9 on what is called the "KP index" that resulted in aurora that could be seen in the US as far south as Alabama.