Space Weather Overview 
CME blast and subsequent impact at Earth -- This illustration shows a CME blasting off the Sun's surface in the direction of Earth and subsequent impact at Earth. This left portion is composed of an EUVI 304 image from SDO superimposed on a SOHO C2 coronagraph. Two to four days later, the CME cloud is shown striking and beginning to be mostly deflected around the Earth's magnetosphere. The blue paths emanating from the Earth's poles represent some of its magnetic field lines. The magnetic cloud of plasma can extend to 30 million miles wide by the time it reaches Earth. These storms, which occur frequently, can disrupt communications and navigational equipment, damage satellites, and even cause blackouts. (Objects in the illustration are not drawn to scale.)
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