Can the earth's magnetic field be sustained by core oscillations

Details Can the earth's magnetic field be sustained by core oscillations Can the earth's magnetic field be sustained by core oscillations

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..409g&link_type=abstract

Geophysical Research Letters, vol. 2, Sept. 1975, p. 409-412.

Physics

30

Earth Core, Geomagnetism, Magnetic Measurement, Oscillations, Amplitudes, Dynamo Theory, Gravity Anomalies, Magnetic Fields, Seismic Waves

Scientific paper

Some recent suggestions for generating the earth's magnetic field via short period oscillations of the liquid core are critically examined. Seismic energy seems inadequate for the purpose. Limits on the minimum amplitude of such oscillations are derived and these are shown to be so large that they would be accompanied by observable gravity anomalies. It is concluded that waves with periods much less than years are unimportant for the dynamo problem.

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