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Published on Jan 16, 2010
Glatzmaier and Roberts created a physical model of Earth magnetic field production in the planet's liquid core and ran a simulation on supercomputers. This video shows the moment of spontaneous reversal of Earth magnetic field. Modeling time flows on the order of 100 years per second; the whole reversal process completes in less than a thousand years. Note that color intensity does not represent the field strength. During the reversal, overall strength of the field decreases 10-fold.