Ref: http://spaceweather.com/

MAGNETIC STORM: A strong geomagnetic storm is in progress. It began at
approximately 0800 UT on Nov. 20th when a coronal mass ejection swept
past Earth. Auroras have been sighted as far south as Alabama and
Arizona in the United States and Greece in Europe.

See: http://spaceweather.com/

Monitor
http://www.edu-observatory.org/eo/aurora.html