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Anomalous vertical magnetic field for electromagnetic induction in a laterally varying thin conductive sheet
Author(s) -
Hill David A.,
Wait James R.
Publication year - 1986
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs021i004p00617
Subject(s) - electromagnetic induction , magnetic field , electrical conductor , electromagnetic field , conductivity , field (mathematics) , horizontal and vertical , condensed matter physics , materials science , geophysics , geology , physics , geodesy , composite material , mathematics , quantum mechanics , pure mathematics , electromagnetic coil
We employ a simple model to show how the natural electromagnetic field on the surface of the earth, which has a strong horizontal magnetic field component, can be converted to a significant vertical magnetic field at the surface. Such a conversion mechanism will be caused by lateral variations of the subsurface conductivity structure. Our idealized model is a thin conducting sheet with a periodic variation of the conductivity‐thickness product in one horizontal direction only.