International audienceElectro-kinetic coupling Porous media can be seen as a solid matrix containing gaps filled with fluid or gas. When these phases contain charge differences, the propagation of a seismic wave generates an electromagnetic wave. Indeed, the propagation of a mechanical wave agitates charged particles, which creates electrical current. Modeling seismoelectric effects A model of the coupling phenomenon was provided by Pride [1] that consists in coupling Maxwell's (electromagnetics) and Biot's (elastodynamics) equations followed by Pride and Haarsten [2] with a focus on electroseismic effects. These phenomena are inherently multi-scale. On the one hand, they arise from a coupling at a small scale. But, on the other, these seismic-wave-induced electromagnetic perturbations may occur at depths such as 300m underground. Features of the solution depend both on macro scale data such as scattering at geological layer interfaces and on micro scale coupling. This effect occurs in the Earth. If we take a look at the constitution of the Earth (sand/sandstone) at large scale we have seeds/pores that are charged in excess (usually negative) and when the wave propagates there is a fluid-solid motion transporting counterions that induces an electrical current.[1] Pride, S. R. (1994). Governing equations for the coupled electromagnetics and acoustics of porous media
