Earth's magnetic field weakens every 200 million years
The study supports the theory that the strength of the earth’s magnetic field is cyclical, and weakens every 200 million years.
Source: techexplorist.com
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Ancient Lava Reveals Earth's Magnetic Field Really Does Have a Cycle of 200M Years
We know that Earths magnetic field is always shifting in its direction and its strength. Just how quickly these changes are happening is of great interest, considering this planetary feature keeps us all protected from violent cosmic radiation.
United Kingdom Kiman Superchron Louise Hawkins University Of Liverpool Mid Palaeozoic Dipole Mp Quot
Source: sciencealert.com