Science
A 41,000-year-old secret could predict the next shift in Earth – Inverse
Scientists recently discovered a 5.5 meter-long sediment core taken from the bottom of Lake Selina, Tasmania, unpacking 270,000 years of Earth’s history.
About 41,000 years ago, something remarkable happened:
Earths magnetic field flipped and, for a temporary period, magnetic north was south and magnetic south was north.
Palaeomagnetists refer to this as a geomagnetic excursion. This event, which is different to a complete magnetic pole reversal, occurs irregularly through time and reflects the dynamics of Earths molten outer core.
The strength of Earths magnetic field would have almost vanished during the event, called the Laschamp excursion, which…
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