NASA
Nasa: Space Place: What Is Space Weather?
Learn all about space weather and solar wind. Comared to the energy of these storms, Hurricane Katrina was no comparison.
CK-12 Foundation
Ck 12: Physical Science: Earth as a Magnet
[Free Registration/Login may be required to access all resource tools.] Explains how Earth is a magnet, its geographic and magnetic poles, and its magnetic field.