PICK OF THE WEEK
Pick of The Week
Extended Coronal Hole (January 15, 2001)
|Coronal holes appear dark areas of the corona when viewed in ultraviolet light. This elongated hole area from January 11, 2002 was one of the largest seen by SOHO. Although they are usually located at the poles of the Sun, coronal holes can occur other places as well. The magnetic field lines in a coronal hole extend out into the solar wind rather than coming back down to the Sun's surface as they do in other parts of the Sun. Thus, they are often the source of strong solar wind gusts that carry solar particles into space and possibly impact the Earth.