X1.8 Flare from Sept. 7, 2011 (IMAGE) NASA/Goddard Space Flight Center Caption An X1.8 flare from Sept. 7, 2011, captured here with by the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO). Credit Credit: NASA/SDO/LMSAL/GOES Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.