Video: Earth's wandering magnetic field

Earth's magnetic field is continuously changing.

Magnetic north wanders, and every few hundred thousand years the polarity gradually flips, so that a compass would point south instead of north.


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Citation: Video: Earth's wandering magnetic field (2013, November 26) retrieved 16 September 2019 from https://phys.org/news/2013-11-video-earth-magnetic-field_1.html
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