geomagnetic reversal
Sign in to saveAlso known as magnetic field reversal
change of direction of Earth magnetic field
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Vinony's link graph records 191 inbound references to geomagnetic reversal, and connects out to magnetostratigraphy, Journal of Geophysical Research and Sun.
Vinony files it under Geomagnetic reversal, Geophysics and Paleomagnetism.
Vinony links it to 30 Wikipedia language editions.
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Encyclopedic overview
Geomagnetic polarity during the last 5 million years (Pliocene and Quaternary, late Cenozoic Era). Dark areas denote periods where the polarity matches today's normal polarity; light areas denote periods where that polarity is reversed.
A geomagnetic reversal is a change in the Earth's dipole magnetic field such that the positions of magnetic north and magnetic south are interchanged (not to be confused with geographic north and geographic south). The Earth's magnetic field has alternated between periods of normal polarity, in which the predominant direction of the field was the same as the present direction, and reverse polarity, in which it was the opposite. These periods are called chrons.
Excerpted from Wikipedia’s “geomagnetic reversal” article, available under the CC BY-SA 4.0 licence.