The strongest solar flares seen in five years are sending a mass of charged particles towards Earth, which could cause radio interference and auroral displays.
According to NASA, the Sun unleashed an M-2 (medium-sized) solar flare, an S1-class (minor) radiation storm and a spectacular coronal mass ejection (CME) on June 7, 2011 from sunspot complex 1226-1227. The large cloud of particles mushroomed up and fell back down looking as if it covered an area of almost half the solar surface.
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