Earth's Magnetic Field Flipping
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north polarityScienceAlert
•Earth's Flipping Magnetic Field Heard as Sound Is an Unforgettable Horror
87% Informative
Earth 's magnetic field dramatically flipped a little more than 40,000 years ago.
The last such cataclysmic event left a signature in the Laschamps lava flows in France .
The reversal process allowed a surpluss of cosmic rays to pass into Earth 's atmosphere.
Were this to happen again today , our north-pointing compasses would point to the South Pole .
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