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16 November, 18:32

How often does the Earth's magnetic field switch polarity? How often does the Earth's magnetic field switch polarity? every 100,000 to several million years every 10,000 to 50,000 years every 10,000 to 100,000 years every 500,000 years

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  1. 16 November, 20:04
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    every 100,000 to several million years

    Explanation:

    This is the closest option ...

    The last happened about 780,000 years ago and is called the Brunhes-Matuyama reversal.
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