A coronal mass ejection (CME) is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar flares and other forms of solar activity, but a broadly accepted theoretical understanding of these relationships has not been established. A coronal mass ejection on Feb. 27, 2000 taken by SOHO LASCO C2 and C3. A CME blasts into space a billion tons of particles traveling millions of miles an hour. Coronal Mass Ejections : An Introduction Angelos Vourlidas Naval Research Laboratory Contributions from R.A. Howard T. Zurbuchen A Coronal Mass Ejection (CME) is a massive release of solar wind and magnetic fields from the Sun's corona. During a CME, large amounts of charged particles (such as electrons and protons) and plasma are ejected into space at extremely high speeds, often reaching millions of kilometers per hour.
