New simulations of the Earth’s internal magnetic field reveal that compasses could start pointing south in mere thousands of years! That is reversing its polarity!
The more tidily the undulations in the Earth’s magnetic field align with the equator; the field will be more prone to reverse its polarity, according to mathematical models.
* Fading out in the magnetic field
* Then a restarting leading compass needles to swing south.
Why is it happening?
One possibility:- The Earth’s solid inner core — surrounded by a circulating, convecting magnetic field-generating outer core — is getting bigger, which ‘theoretically’ should be steady over the eons. During this period, the Earth’s interior cools and more of that liquid outer core solidify, fusing on the inner core.