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Transient electromagnetic vs. seismic prospecting—a correspondence principle Normal access

Author: Adrianus T. Hoop
Journal name: Geophysical Prospecting
Issue: Vol 44, No 6, November 1996 pp. 987 - 995
DOI: 10.1111/j.1365-2478.1996.tb00187.x
Organisations: Wiley
Language: English
Info: Article, PDF ( 370.95Kb )

A correspondence principle is derived that relates the Green's functions (point-receiver responses to point-source excitations) for 2D transient diffusive electro-magnetic fields with electric field in the vertical plane to 2D seismic waves (in the acoustic approximation) with particle velocity in the vertical plane in arbitrarily inhomogeneous media. The constituent medium parameters in the two cases are related via two global proportionality constants. The kernels in the integral operators that express the diffusion phenomenon in terms of the wave phenomenon are of a smoothing nature. The fact that they are explicitly known can be of importance to the inverse operation. The correspondence principle is the fundamental tool in comparing the spatial resolving powers in the two methods of geophysical prospecting.

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