What Does Geomagnetic Reversal Mean?

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Geomagnetic reversal is the name of the phenomenon by which the Earth's magnetic field switches its polarity. Find out what geomagnetic reversal really means with help from an applied physics professional in this free video clip.

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Hello, my name is Walter Unglaub, and this is what does geomagnetic reversal mean. Geomagnetic reversal is the name of the phenomenon by which the Earth's magnetic field switches its polarity. So as of today we have the magnetic north pole and the geographic or geodedic south pole and the magnetic field that is external to the Earth flows from the north pole conventionally to the south magnetic pole which is located in geographic north. The external magnetic field of the Earth is theorized to be generated from dynamo. The dynamo theory states that the elements inside of the mantle as they rotate inside of the Earth underneath the crust will give rise to this external magnetic field. And the properties of these dynamics can be understood electromagnetically. Now the reversal of the magnetic pole simply means that over time due to either some external event such as a major collision from an asteroid or some large body in space or from plate tectonic activity the poles can be switched spontaneously from action inside of the mantle. This occurs on a time scale on average of 450,000 years and it will happen due to external either an external event or some sort of plate tectonic activity. After the spontaneous transition once the magnetic field settles down after the next geomagnetic reversal the north magnetic field will actually be in the same location as the north geographic or geodedic pole. And so the Earth's magnetic field will flow from the north pole to the south pole. My name is Walter Unglaub and this is what does geomagnetic reversal mean.

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