SDO
29th October 2013, 23:40
Active region 11875 let loose an X2.3 flare. Strong radio emissions were also measured during this flare. The flare started at 2142 UT (5:42 pm ET) and lasted about 20 minutes. The active region is on the limb (edge) and it rotating out of sight from SDO.
More... (http://sdoisgo.blogspot.com/2013/10/another-x-class-flare.html)
More... (http://sdoisgo.blogspot.com/2013/10/another-x-class-flare.html)