Spectacular prominence eruption as seen by the Solar Dynamics Observatory on June 7, 2011Yesterday, June 7, 2011, the Sun unleashed an M-2 (medium-sized) solar flare, an S1-class (minor) radiation storm and a spectacular coronal mass ejection (CME) from sunspot complex 1226-1227. This not-squarely Earth-directed CME is moving at 1400 km/s according to NASA models. The CME should deliver a glancing blow to Earth's magnetic field during the late hours of June 8th or June 9th. High-latitude sky watchers should be alert for auroras when the CME arrives.
The highly energetic protons ejected from the Sun have reached geospace and been recorded by the European Space Agency (ESA) SREM unit on-board the Herschel and INTEGRAL spacecraft, as seen in the flux profiles provided by the Institute for Space Applications & Remote Sensing of the National Observatory of Athens.
Watch here the relevant video: