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The past month has seen a startling increase in activity by the Sun with four powerful X-class solar flares recorded; including one that measured as a X9.3, the strongest since 2005. Coronal mass ejections (CME) – huge arcs of plasma that erupt from the Sun’s surface – interfered with GPS, and high-frequency radio transmissions, and generated spectacular aurora displays. But, in addition to the sudden intensity of these events, this recent burst of activity has left scientists scratching their heads.read more