Local instability of a current sheet at the core/mantle boundary

Details Local instability of a current sheet at the core/mantle boundary Local instability of a current sheet at the core/mantle boundary

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ge%26ae..29..470b&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 29, May-June 1989, p. 470-475. In Russian.

Physics

Geophysics

1

Current Sheets, Earth Core, Earth Mantle, Geophysics, Magnetohydrodynamic Stability, Dynamo Theory, Latitude, Magnetic Variations, Perturbation Theory

Scientific paper

It is shown numerically and analytically that, in the current sheet at the outer boundary of the core, there arises an MHD instability localized in a narrow region at midlatitudes. Disturbances move toward the west with a velocity of the order of that of the westward drift and may be connected with observed foci of short-period geomagnetic variations.

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