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Index/Organizations/World Magnetic Model

World Magnetic Model

Large spatial-scale model of the Earth's magnetic field

Fact-Checks

2 results
Nov 26, 2025
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How long does a magnetic pole reversal take and what signs precede one?

Geoscience literature and agency reporting show that geomagnetic reversals are slow, messy events taking from about a few hundred years in short excursions up to several thousand — most commonly quote...

Nov 25, 2025
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How often have Earth's magnetic poles flipped in the past and when was the last reversal?

Earth’s magnetic field has flipped many times in the geologic past—more than ~180 full reversals over the last ~83 million years and at least several hundred reversals across the past ~160 million yea...