First Australian evidence of big shift in Earth’s magnetic poles found, might help predict the next

Different from a reversal of magnetic poles, this 'excursion' happens irregularly, in response to dynamics of Earth’s molten outer core.

from http://www.firstpost.com/tech/science/first-australian-evidence-of-big-shift-in-earths-magnetic-poles-found-might-help-predict-the-next-9313261.html