Chris, it's worse than you think. <img src="images/graemlins/wink.gif" alt="" /> The earth's magnitic pole is quickly drifting north, approx 40km/yr., through the Canadian arctic and will end up in Siberia in a few decades!

NASA had a very informative article on this subject, Earth's Inconstant Magnetic Field . It also discusses the periodic magnetic pole flip-flop and the gradual weakening of our magnetic field.

Compass makers better be prepared. Here's an image of the magnetic fields today and what it might look like during a reversal.



How would you set declination then???? <img src="images/graemlins/grin.gif" alt="" />