The Effect of Displacement Currents on Time Domain Electromagnetic Fields

Terry Lee

doi:10.1071/EG981034

ISSN: 0812-3985
E-ISSN: 1834-7533

The Effect of Displacement Currents on Time Domain Electromagnetic Fields
Authors Terry Lee^a,b
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^a P.O. Box 217, Gordon, N.S.W., 2072 ^b Division of Mineral Physics Commonwealth Scientific and Industrial Research Organization, P.O. Box 136, North Ryde, , N.S.W., 2113
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 12, Issue 3, Sep 1981, p. 34 - 36
DOI: https://doi.org/10.1071/EG981034
- Published online: 01 Sep 1981

Abstract

The usual practice of neglecting displacement currents in the calculation of electromagnetic transients is critically examined for the case of a uniform ground. For this case it is shown that the percentage error involved in the calculation by the neglect of the displacement currents is approximately (1500/4) arctan [∈1/(σ t)], where t denotes time and σ1 and ∈1 denote the conductivity and permittivity of the ground respectively.

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1981-09-01

2026-01-19

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References

Lee, T. J. (1979), Transient electromagnetic waves applied to prospecting, Proc. IEEE&7, 1016-21.
Lee, T. (1981), Transient electromagnetic response of a polarizable ground, Geophysics (in press).
Lee, T. & Lewis, R. (1974), Transient EM response of a large loop on a layered ground’, Geophys. Prosp. 22, 430-44.
Morrison, M. F., Phillips, R. J. & O’Brien, D. P. (1969), ‘Quantitative interpretation of transient electromagnetic fields over a layered halfspace’, Geophys. Prosp. 17, 82-101.
Pelton, W. H., Rijo, L. & Swift, C. M. (1978), ‘Inversion of two-dimensional resistivity and induced-polarization data’, Geophysics 44, 788-803.
Spies, B. R. (1980), ‘A field occurrence of sign reversals with the transient electromagnetic method’, Geophys. Prosp. 28, 620-632.
Sveshnikov, A. & Tikhonov, A. (1973), The Theory of a Complex Variable. Translated from the Russian by G. Yankovsky, MIR Publishers, Moscow.

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Article Type: Research Article

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The Effect of Displacement Currents on Time Domain Electromagnetic Fields

Abstract

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