The earth’s magnetic field is known to shift occasionally. North and south reverse. But why does that happen? The earth’s magnetic field is due to the direction of the rotation of the molten core. So does this core randomly start moving in the other direction? What causes that? And if it’s reversing directions, shouldn’t it stop at any point ? If so, why does it start moving in the other direction?
In: Earth Science
https://en.wikipedia.org/wiki/Geomagnetic_reversal#Causes
They’re not sure yet. But models of the movement of Earth’s liquid iron core have also resulted in seemingly random reverses, so it’s something inherent to how the liquid iron is behaving.
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