Prediction of Geomagnetic Secular Change confirmed

Details Prediction of Geomagnetic Secular Change confirmed Prediction of Geomagnetic Secular Change confirmed

Jul 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969natur.223..165k&link_type=abstract

Nature, Volume 223, Issue 5202, pp. 165 (1969).

Astronomy and Astrophysics

Astronomy

5

Scientific paper

THERE is a strong (0.93) correlation1,2 between the change in the length of day and the change in westward velocity of the eccentric dipole or ``magnetic centre'' (as defined by Schmidt3) of the geomagnetic field, presumably because of the conservation of the angular momentum of the Earth. If the motion of the eccentric dipole is related to a motion somewhere in the core in which the magnetic field is ``frozen'' into the fluid, then a change in westward motion and angular momentum in the core must be compensated for by a change in angular momentum of the mantle. This appears as a change in the length of day, as determined astronomically.

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