Sun erupts with powerful X1 and M8.7 flares! Spacecraft sees 'fireworks'
X1.7 class solar flare - NASA images of a strong and long eruption (May 13, 2013) - Video Vax
X1.7 Solar Flare - October 25, 2013
Major X1.7 Solar Flare & CME May 13, 2013
X-Class: A Guide to Solar Flares
X1.7 Class Solar Flare 13/05/13
SOLAR ACTIVITY UPDATE: X1.7, X2.8 and an X3.2-Class Solar Flares(May 14th,2013).
X1.7 Solar Flare (5/13/2013)
25 October 2013; X1,7-class solar flare
5 13 2013 Impressive X class Solar Flare X1 7 not Earth directed
SOLAR ACTIVITY UPDATE: X1.7-Class Solar Flare/CME (May 13th, 2013).
NASA | First X-Class Solar Flares of 2013
SDO Captures Release of X1.2 Class Solar Flare
X1.7 Solar Flare - SDO - (Jan 27, 2012)
X8.7! Huge sunspot blasts biggest flare of solar cycle - Spacecraft sees it and more
Solar flare of class X1.7 on January 27, 2012 at 18:37
X1.7 Solar Flare - Sunspot 1402 (Jan 27, 2012) - SolarHam.com
First Solar X-Flare Of The Year Is A Doozy | Video
MASSIVE X1.7 - CLASS SOLAR FLARE OCTOBER 25, 2013
SOLAR ACTIVITY UPDATE: X1.7-Class Flare/CME/Proton Event (Jan 27th, 2012).