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News From the Field

First Measurement of Magnetic Field in Earth's Core

December 16, 2010

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Measurements of the magnetic field at the Earth's surface can tell only so much about the dynamo producing it in the planet's core. University of California, Berkeley, geophysicist Bruce Buffett has now used precise astronomical position data to calculate tidal damping in the core and determine for the first time, the magnetic field in the center of the planet. The measurement, 25 Gauss, is in the middle of what various scientists have predicted. Full Story

University of California, Berkeley

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