So it's my understand that the north and south poles switch position every couple hundred years or so. Is it just a coincidence that they're over the coldest regions in the world? I'm assuming it takes time for the pokes to swap...
Magnets. How do they work?(3 posts) (3 voices)
The cycle is irregular, but a minimum time for a cycle of the Earth's field is measured in thousands of years. A typical one is tens of thousands of years. When the field begins to flip, it can happen quickly in geological terms (a few centuries to a few millennia).
It is just a coincidence that the magnetic poles are over the coldest parts of the planet, but probably not entirely a coincidence that they are near the geographic poles.
The present field appears to be weakening rapidly and getting ready to flip polarity. Most estimates put it at zero field strength a couple of thousand years from now.
Darn, I though this would be a rant about ICP. Grin
You must log in to post.