There have been only a handful of X-flares since the beginning of new Solar Cycle 24. So far, all in 2011: Feb. 15 (X2), March 9 (X1), Aug. 9 (X7), Sept. 6 (X2), Sept. 7 (X2). Before these the last X-flare was on Dec.14, 2006, during Solar Cycle 23.
NASA's STEREO spacecraft resolved a 40-year mystery about how coronal mass ejections change shape during their long journey. With new data processing techniques, STEREO scientists have succeeded in continuously tracking o espaço weather.