Coronal Magnetism at Minimum Activity

Coronal Magnetism at Minimum Activity

. Near the minimum in the 11-year cycle of solar magnetic activity, the coronal magnetic fields lines have a dipole-type geometry and equatorial current sheet. The high-speed wind escapes along the open magnetic field lines in the Polar Regions. At the equator, where the slow wind originates, the magnetic field lines have been pulled outward by the solar wind into oppositely directed, parallel magnetic fields separated by a neutral current sheet.

Copyright 2010, Professor Kenneth R. Lang, Tufts University