ULF emission induced by tension and shear cracks

Penetration of low-frequency waves through a conductive medium due to the inductive seismo-electromagnetic effect is considered by a double-potential method. The source of electromagnetic waves induced by the movement of a conductive medium in a geomagnetic field is produced by tension and shear cracks. The analytical solution for tension cracks is obtained. The system of equations describing this process in the case of shear cracks in spherical coordinates is reduced to a two dimensional nonstationary system, which is solved by a second order algorithm that conserves some integral properties of the initial equations. Results are discussed.