A termomagnetoelastic model of the earthquake source mechanism

An explicit expression is derived for the body force, magnetic moment and heat source to be applied in the absence of a dislocation to produce a radiation pattern identical to that of a dislocation. These quantity depend only on the fault mechanism and the material properties of the medium in the immediate vicinity of the fault. The theory is developed for dislocation in an anisotropic inhomogeneus thermoelastic medium that exhibits pyromagnetic and piezomagnetic properties. The magnetic moment equivalent, that completely describes the magnetical effects of the dislocation, is found to be dependent on the discontinuitis of the displacement prescribed across the fault, through the piezomagnetic coefficients. Discontinuities in the thermal field and its derivatives do not contribute to the magnetic moment equivalent, thus leading to the conclusion that pyromagnetism cannot produce magnetic effects