Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012geoji.188..925r&link_type=abstract
Geophysical Journal International, Volume 188, Issue 3, pp. 925-944.
Physics
Numerical Solutions, Magnetic And Electrical Properties, Body Waves, Wave Propagation
Scientific paper
The electrokinetic effect is one mechanism that causes the coupling between seismic and electromagnetic energies. This study deals with the numerical simulation of the electrokinetically induced coseismic electromagnetic fields associated with seismic waves created by a finite faulting in porous media. The key point of our numerical technique is to combine the point source stacking method with the Luco-Apsel-Chen generalized reflection and transmission method. After some validation test of our simulation method, we show several numerical simulation examples. Through a near-field model, we show that the point source approximation is not accurate in this configuration, as well as that the position of the rupture starting point and rupture speed obviously affect the coseismic EM fields. Then we numerically investigate the influence of different media properties on seismic waves and coseismic EM fields. We also carry out simulations of multilayer half-space models and show the characteristics of the coseismic EM fields. The preliminary results indicate that our numerical technique provides an effective approach of studying coseismic electromagnetic fields associated with seismic waves due to a finite faulting in porous media.
Chen Xiaofei
Huang Qinghua
Ren Hengxin
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