29 Apr '12, 4pm

What will happen when Earth's magnetic poles flip?

What will happen when Earth's magnetic poles flip?

The scientists explained that changes in the Earth's liquid core happen on a completely different distance and timescale than convection in the Earth's mantle (which causes Earth's tectonic plates to shift, moving the continents). The liquid core does indeed touch the bottom of the mantle, but it would take tens of millions of years for changes in the core to propagate up through the mantle and influence the motion of the tectonic plates. In short, "there is no evidence from the geological past and in my opinion also no conceivable method that magnetic reversals could

Full article: http://www.mnn.com/earth-matters/space/stories/should-we-...

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