How do we know that the magnetic field is real?
What is space weather?
"...Slight Chance of Flipping Magnetic Poles..." CNN.com
Why we need to worry about the magnetic shield
USGS reports Geomagnetic Storm in Effect... www.sciencedaily.com
Watch a model for a field reversal
"...Earth loses its magnetism..." BBC NEWS December 31, 2003
The Aurora Borealis and Australis Connection
Variations in Declination