Pole reversals have been happening on average once every 400,000 years, with the most recent one being 730,000 years ago - so we are well overdue. Not only do we not know much about reversals, scientists are still unsure about how our magnetic field is generated. Long thought to be a by-product of the movements of liquid iron in our planet's core, recent studies are suggesting that our salty oceans might be the cause.
Scientists suggest a geomagnetic reversal takes thousands of years and does no harm. They are wrong - it could just as easily happen overnight. No mechanism is known for the cause of the magnetic poles swapping places. Our magnetic field is known to be rapidly declining (10% in the last 150 years), and the magnetic North pole is moving around at an accelerating pace - it has been predicted it will move from Canada to Siberia in the next 50 years. These changes could be indicating an imminent reversal.
Doomsday Amount Prediction in 2012
Possibility this century = 8
Possibility in 2012 = 7
Could Ancients Predict It? = 7
TOTAL = 22