Saturday, 26 July 2014
An aurora is
a natural light display in the sky, especially in the high latitude regions, caused by the collision of solar wind
and magnetospheric charged particles with the high altitude atmosphere. Most
auroras occur in a band known as the auroral
zone, which is typically 3° to
6° wide in latitude and observed at 10° to 20° from the geomagnetic poles at
all local times, but often most vividly around the spring and autumn equinoxes.
The charged particles and solar wind are directed into the atmosphere by the
Earth's magnetosphere. Source
