Source - Space Weather News for March 10, 2011: http://spaceweather.com
X-CLASS SOLAR FLARE: March 9th ended with a powerful solar flare. Less than an hour before midnight (UT), Earth-orbiting satellites detected an X1.5-class explosion from behemoth sunspot 1166. First-look data suggest that the blast did hurl some material toward Earth. Check spaceweather.com for movies of the flare and updates on its possible effects.
SOLAR FLARE ALERTS: Would you like a call when the next X-flare erupts? Sign up for Spaceweather PHONE: http://spaceweatherphone.com . (Text alerts are available, too, from http://spaceweathertext.com .)