Comparison of Estimates of Surface Fluid Motions of the Earth's Core for Various Epochs.

Comparison of Estimates of Surface Fluid Motions of the Earth's Core for Various Epochs.

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The velocity patterns of the fluid at the surface of the earth's core are compared for different epochs since 1885. The velocity of the fluid at the surface of the earth's core can be related to the magnetic field and its secular change through hydro...