Auroras Near the Magnetic Poles
Name: bruce s maccallum
Date: 1993 - 1999
Why do auroras appear near the magnetic poles?
Describe the ionosphere.
Ionosphere is the uppermost layer of atmosphere. It is completely
ionized (hence the name ionosphere) by the radiation from the Sun and cosmic
Near magnetic poles, the lines of magnetic field (of Earth) enter the
atmosphere. Charged particles emitted by the Sun move along the lines of mag.
field. Therefore they enter the atmosphere where the lines do -- at the magnetic
poles. Here they interact with a atmosphere and produce Aurora.
Click here to return to the Astronomy Archives
Update: June 2012