The fundamental model of magnetotelluric sounding

It is widely believed that the Tikhonov-Cagniard model can be applied in the magnetotelluric method of exploration geophysics if the horizontal field changes are sufficiently slow. Actually, this is overly restrictive and may give rise to unjustified doubts about the validity of the Tikhonov-Cagniar...

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Bibliographic Details
Published inProceedings of the IEEE Vol. 67; no. 7; pp. 1034 - 1044
Main Authors Dmitriev, V.I., Berdichevsky, M.N.
Format Journal Article
LanguageEnglish
Published IEEE 01.01.1979
Subjects
Conductivity measurement
Earth
Electric variables measurement
Electromagnetic measurements
Geophysical measurements
Geophysics
Linearity
Magnetic field measurement
Riccati equations
Surface impedance
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Summary:It is widely believed that the Tikhonov-Cagniard model can be applied in the magnetotelluric method of exploration geophysics if the horizontal field changes are sufficiently slow. Actually, this is overly restrictive and may give rise to unjustified doubts about the validity of the Tikhonov-Cagniard model. This paper shows that the condition determining the applicability of the model is the linearity of the horizontal field changes, rather than the slowness of these changes. This considerably extends the sphere of practical applications of the Tikhonov-Cagniard model.
ISSN:0018-9219
1558-2256
DOI:10.1109/PROC.1979.11386