On the origin of the Earth's magnetic field

Details On the origin of the Earth's magnetic field On the origin of the Earth's magnetic field

2003-12-24

arxiv.org/abs/astro-ph/0312617v1

Astronomy and Astrophysics

Astrophysics

11 pages

Scientific paper

It is thought that the magnetic field of the Earth is generated by the hydromagnetic dynamo action in the Earth's liquid outer core, consisting mainly of iron (the standard model). Here I propose that the magnetic field of the Earth is generated by dynamo action in the world ocean at the Earth's surface. This hypothesis is free of the problems of the standard model; in particular, it explains the close temporal correlation between geomagnetic reversals and the stratigraphic boundaries defined by major or minor mass extinctions. Implications of this hypothesis for other terrestrial planets are briefly discussed.

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