Open AccessElectromagnetic induction in a spherical earth with non‐uniform oceans and continents in electric contact with the underlying medium—I. Theory, method and example
Author(s) -
Fainberg E. B.,
Kuvshinov A. V.,
Singer B. Sh.
Publication year - 1990
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.1990.tb04465.x
Subject(s) - dissipative system , geophysics , resistive touchscreen , electromagnetic induction , crust , geology , electric current , mantle (geology) , magnetic field , electric field , mechanics , physics , computer science , electromagnetic coil , quantum mechanics , computer vision
SUMMARY This paper presents basic principles of the iterative‐dissipative method and main points of its numerical realization. A spherical earth model consisting of a thin non‐uniform surface layer being in galvanic contact with an underlying stratified medium is considered. The current system induced by a uniform magnetic field in the model with a realistic distribution of surface conductance is calculated. It is shown that leakage currents are significant even for the earth model with a highly resistive crust and upper mantle.