Inversion of magnetovariation event to causative current. I. Current sheet model

Details Inversion of magnetovariation event to causative current. I. Current sheet model Inversion of magnetovariation event to causative current. I. Current sheet model

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pepi...53...46x&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 53, Issue 1-2, p. 46-54.

Physics

4

Scientific paper

Electromagnetic induction in a horizontally layered medium is formulated in matrix form. The observed magneto-variation event is inverted to a horizontal current sheet in a conducting Earth after the separation of the fields into internal and external parts in wave-number domain. Two frequency components of magnetovariation events (T = 69 and 23 min) recorded in southern Alberta and British Columbia, Canada, are inverted to their internal current sheet source. The current concentration across the Canadian Rocky Mountains is found in a narrow band of 70-80 km width. The maximum depth of this current is estimated at ~ 55km, near the base of the thick crust in this area.

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