Last updated on April 17, 2014 at 17:30 EDT

Another Proton Storm

February 7, 2012

An X1.7 flare (X represents the largest category) and a coronal mass ejection (CME) erupted from the Sun (January 27-28, 2012) from the same active region that produced a smaller but Earth-directed storm a few days earlier.  credit:  NASA