Laboratory measurements and theoretical modeling of seismoelectric interface response and coseismic wave fields

Journal article (2011)
Department
Geotechnology (CEG) (TU Delft)
Copyright: American Institute of Physics
DOI: https://doi.org/doi:10.1063/1.3567945
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Published Date

08-04-2011

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Source:

Journal of Applied Physics, 109 (7), 2011

Faculty

Civil Engineering and Geosciences

Department

Geotechnology

Abstract

A full-waveform seismoelectric numerical model incorporating the directivity pattern of a pressure source is developed. This model provides predictions of coseismic electric fields and the electromagnetic waves that originate from a fluid/porous-medium interface. An experimental setup in which coseismic electric fields and interface responses are measured is constructed. The seismo-electric origin of the signals is confirmed. The numerically predicted polarity reversal of the interfacial signal and seismoelectric effects due to multiple scattering are detected in the measurements. Both the simulated coseismic electric fields and the electromagnetic waves originating from interfaces agree with the measurements in terms of travel times, waveform, polarity, amplitude, and spatial amplitude decay, demonstrating that seismoelectric effects are comprehensively described by theory.

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