Alternative to the geomagnetic self-reversing dynamo

Details Alternative to the geomagnetic self-reversing dynamo Alternative to the geomagnetic self-reversing dynamo

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975natur.253..707v&link_type=abstract

Nature, vol. 253, Feb. 27, 1975, p. 707, 708.

Physics

5

Dynamo Theory, Earth Core, Geomagnetism, Magnetic Poles, Magnetic Field Configurations, Magnetohydrodynamics, Paleomagnetism, Solid State Physics

Scientific paper

An alternative analysis of the geomagnetic field which can account for magnetic reversals but which does not require a self-reversing dynamo is described. The analysis is based on the assumption of two separate sources for the geomagnetic field. It avoids the complexities inherent in a self-reversing dynamo theory. Systematic asymmetries between the two polarity states and a technique of treating present field data demonstrate the probability of the two-source analysis. The inner and outer cores of the earth would account for the two sources. A mechanism for solid inner core magnetic field generation must come not from a magnetohydrodynamic system, but from solid-state physics.

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