Last updated on April 21, 2014 at 9:29 EDT

Biggest Solar Storm Since 2005

January 24, 2012

The sun erupted late on January 22, 2012 with an M8.7 class flare, an earth-directed coronal mass ejection (CME), and a burst of fast moving, highly energetic protons known as a “solar energetic particle” event.  credit:  NASA