On the stimulation of acoustic emission in rock samples by electromagnetic fields

Author: Borovskii B.   Bogomolov L.   Zakupin A.   Mubassarova V.  

Publisher: MAIK Nauka/Interperiodica

ISSN: 1069-3513

Source: Izvestiya, Physics of the Solid Earth, Vol.47, Iss.10, 2011-10, pp. : 926-936

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Abstract

The combined impacts of the electromagnetic fields generated by two independent sources on the process of crack formation in loaded heterogeneous materials (rocks) are studied. The interest in such experiments lies in the fact that in natural conditions, the combination of several fields—the potential triggers of seismic activity—is rather the rule than the exception. It is shown by examples that in the conditions of crossed electric and magnetic fields (CrEMFs) the enhancement in acoustic activity can be triggered with a lower strength electric field than in case of the electric impact alone.