Thu, 05 Jul 2012 09:32 CDT
Behemoth sunspot AR1515 is crackling with M-class solar flares and appears to be on the verge of producing an X-class explosion. On July 4th the active region hurled at least four minor CMEs into space, including one toward Earth. Click to view
an animated forecast track of the incoming cloud.
According to analysts at the Goddard Space Weather lab, who prepared the forecast, the cloud will reach Earth on July 7th around 0600 UT. High-latitude sky watchers should be alert for auroras on that date.