X9-Class Solar Flare of Dec. 5, 2006 (IMAGE) NASA/Goddard Space Flight Center Caption The X9-class solar flare of Dec. 5, 2006, observed by the Solar X-Ray Imager aboard NOAA's GOES-13 satellite. Credit NOAA's Space Weather Prediction Center 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.