Inductive seismo-electromagnetic effect in relation to seismogenic ULF emission

O. Molchanov, A. Kulchitsky, M. Hayakawa
2001 Natural Hazards and Earth System Sciences  
During the seismic wave propagation through the crust, the electromagnetic pulse can originate due to MHD conversion in this conductive medium. On the assumption of simple models of seismic wave excitation and attenuation, the problem is reduced to the analysis of a diffusionlike equation for a vector potential function. In this way, we need to change the classical gauge condition. A semianalytical form of the solution is obtained in a case with constant ground conductivity. Dependencies of the
more » ... electric and magnetic field components and the pulse duration on distance and crust conductivity have been computed in detail. The results could be useful for the explanation of electromagnetic signals related to coseismic, foreshock and aftershock activity.
doi:10.5194/nhess-1-61-2001 fatcat:sgkj6zbfjrboxh5iuls6ihg3aq