SDO Observations of X-Class Solar Flare (IMAGE) NASA/Goddard Space Flight Center Caption NASA's Solar Dynamics Observatory captured these images of an X-class flare on Feb. 15, 2011. Credit NASA's Goddard Space Flight Center/SDO 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.