Magnetic cloud from the Sun hits the Earth

Magnetic cloud from the Sun hits the Earth

Fig. 4.27 . When a coronal mass ejection travels into interplanetary space, it can create a huge magnetic cloud containing bidirectional, or counter-streaming, beams of electrons that flow in opposite directions within the magnetic loops that are rooted at both ends in the Sun. The magnetic cloud also drives an upstream shock ahead of it. Magnetic clouds are only present in a subset of observed interplanetary coronal mass ejections. (Courtesy of Deborah Eddy and Thomas Zurbuchen.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University