Finite Difference Modeling of Near-Surface Electroseismic Coupling

The electroseismic phenomenon is a conversion from electromagnetic energy to elastic wave<br>energy that occurs at electric double layers, such as clay-water interfaces, where charge has<br>accumulated. The electroseismic coupling and measured response are functions of a number of physical<br>properties that control ionic strength and current flow; coupling increases with increased pore water<br>conductivity, temperature, and permeability and with decreased pore tortuosity, viscosity, and volumeto-<br>surface ratios in the pores.