The nature of secular variations of the Earth's main magnetic field.

Details The nature of secular variations of the Earth's main magnetic field. The nature of secular variations of the Earth's main magnetic field.

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ge%26ae..29..874r&link_type=abstract

Geomagn. Aeron., Vol. 29, No. 6, p. 874 - 878

Physics

1

Geomagnetic Field: Secular Variations

Scientific paper

A mechanism for excitation of the magnetic disturbances causing secular geomagnetic variations with characteristic times of less than 100 years, in particular the 60-year variations, is proposed. These disturbances are concentrated in ropes and loops of magnetic lines generated by the mechanism of a hydromagnetic fluctuation dynamo in the Earth's liquid core. Ropes located in a skin layer about 60 km in thickness near the core-mantle boundary are the source of the observed variations.

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