شبيه سازي امواج الكتروسايزميك ايجاد شده از يك موجك لرزه اي در محيط دولايه

Electroseismic wave simulation generated from a seismic pulse in a two-layer medium

Mechanical and electromagnetic perturbations are coupled in a porous medium saturated with liquid. This coupling is such that, a seismic wave propagating through the mentioned medium will cause a relative movement between the solid and liquid. Then this movement will induce an electrical flux. When a seismic pulse propagates through a medium with specific chemical and elastic properties it causes an unbalance in the electrical flux. The unbalance in the electrical charge will separates the dipoles and multi-poles an both sides of an interface and that makes it possible to record the electromagnetic perturbations at the earthʹs surface. In this paper, electroseismic wave propagation has been studied and simulated in a layered and porous medium saturated with liquid. For this purpose the governing equations of Pride (1994) and the coupled equations of the Biot and Maxwell were used. To calculate the electroseismic traces, the generalized reflection and transmission matrix method was applied.