Emily
Editor, Senior Moderator
http://spaceweather.com/archive.php?view=1&day=05&month=06&year=2011
GEOMAGNETIC STORM: A sharp gust of solar wind hit Earth's magnetic field at approximately 20:30 UT on June 4th. The impact sparked an intensifying G2-class geomagnetic storm, in progress. High-latitude sky watchers in both hemispheres should be alert for auroras.