Ancient inclinations

Jean-Pierre Valet () and Yves Gallet
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Jean-Pierre Valet: the Institut de Physique du Globe de Paris
Yves Gallet: the Institut de Physique du Globe de Paris

Nature, 1998, vol. 396, issue 6709, 315-316

Abstract: The main element of the Earth's magnetic field is an axial dipole aligned with the Earth's rotation axis. But has that always been so? Analysis of a global palaeomagnetic database going back beyond 250 million years ago and deep into the Precambrian provides evidence that, among other possibilities, the field may then have had significant octupole and quadrupole components.

Date: 1998
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DOI: 10.1038/24501

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