Physics, asked by ArjunCRPSM, 1 year ago

I have read that polarity of earth is changing Slowly. Is it true?

Answers

Answered by KUMARCHHOTU
2
Far from being constant, this field is continuously changing. Indeed, our planet's history includes at least several hundred global magnetic reversals, where north and south magnetic poles swap places. So when's the next one ...
Answered by yukta9
0
During a reversal the magnetic field won’t be zero, but will assume a weaker and more complex form. It may fall to10% of the present-day strength and have magnetic poles at the equator or even the simultaneous existence of multiple “north” and “south” magnetic poles.

Geomagnetic reversals occur a few times every million years on average. However, the interval between reversals is very irregular and can range up to tens of millions of years.

There can also be temporary and incomplete reversals, known as events and excursions, in which the magnetic poles move away from the geographic poles – perhaps even crossing the equator – before returning back to their original locations. The last full reversal, the Brunhes-Matuyama, occurred around 780,000 years ago. A temporary reversal, the Laschamp event, occurred around 41,000 years ago. It lasted less than 1,000 years with the actual change of polarity lasting around 250 years.

hope this helps
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