X-Class Flare (IMAGE) NASA/Goddard Space Flight Center Caption On Oct. 24, 2014, NASA's SDO observed an X-class solar flare erupt from a Jupiter-sized sunspot group. Credit Tahar Amari et al./Center for Theoretical Physics/École Polytechnique/NASA Goddard/Joy Ng 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.