geomagnetic reversal

(redirected from Pole reversal)
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geomagnetic reversal

[¦jē·ō·mag¦ned·ik ri′vər·səl]
(geophysics)
Reversed magnetization of the earth's magnetic dipole.
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References in periodicals archive ?
Researchers believe the core region under southern Africa may actually be the birthplace of recent and likely future pole reversals.
Earth has settled in the last 20 million years into a pattern of a pole reversal about every 200,000 to 300,000 years, although it has been more than twice that long since the last reversal.
12) you learned about Earth's weakening magnetic field and the possibility of a pole reversal in the distant future.
However, Kirschvink says there is some doubt as to whether the recent reports on the current weakening of the magnetic field point to an imminent pole reversal.
Pole reversal combined with water recycling eliminates pH and ionic gradient buildup as well as stopping soil drying from nonuniform voltage gradients.
We know of about 170 pole reversals over the last 100 million years.