Seismoelectric effect in Lamb’s problem

Abstract

Seismoelectric effect is studied in the framework of classical Lamb's problem with impulse or timevariable mechanical action on an elastic porous half-space. Radiation of elastic waves gives rise to pressure variation of groundwater fluid contained in pores and cracks. This causes the generation of telluric electric fields and currents due to the seismoelectric effect. A diffusion type equation is applied to describe the variations of the pore pressure and telluric electric field. Particular emphasis has been placed on the properties of seismoelectric signals caused by Rayleigh wave propagation since this wave has maximal amplitude at a considerable distance from the seismic source. For practical purposes and geophysical application, the co-seismic phenomena related to seismoelectric effect are examined in more detail.

Electrokinetic effect provided by long oceanic waves coming on shore

“…In this case, the EK effect arises both in the bottom layer and on the shore. This mechanism of generation of telluric currents is similar in nature to the seismoelectric effect observed in porous water-saturated soils during the passage of seismic waves through ground-recording station [Eleman, 1965;Mogi et al, 2000;Balasco et al, 2014;Surkov and Pilipenko, 2015;Romano et al, 2018;Surkov et al, 2018Surkov et al, , 2020.…”