Source - Space Weather News for April 16, 2012: http://spaceweather.com
SPECTACULAR EXPLOSION: On April 16th around 17:45 UT, magnetic fields curling over the sun's northeastern limb rose up and erupted, producing one of the most visually-spectacular explosions in years. The event, which also produced an M1.7-class solar flare and a coronal mass ejection, was not Earth-directed. Nevertheless, it confirms suspicions that a significant active region is rotating onto the Earth-side of the sun. Visit http://spaceweather.com for movies and updates.
SOLAR FLARE ALERTS: Would you like a call when sunspots erupt? Solar flare alerts are available from http://spaceweathertext.com (text) and http://spaceweatherphone.com (voice).