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Oldest evidence of Earth's magnetic field discovered by researchers

Terra Daily Thursday, 25 April 2024 ()
London, UK (SPX) Apr 25, 2024

Researchers at the University of Oxford and MIT have identified a 3.7-billion-year-old geological record of Earth's magnetic field, which closely resembles the current geomagnetic field in its characteristics. This discovery, published in the Journal of Geophysical Research, offers the earliest confirmed measurement of the magnetic field's strength, recorded at 15 microtesla, nearly half of toda
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