Laboratory study of electromagnetic initiation of slip

V. Chikhladze, Z. Tchelidze, M. Devidze, N. NoVaramashvili, T. Chelidze, T. Matcharashvili
2002 Annals of Geophysics  
Recently Russian seismologists reported the triggering effect of MHD soundings on microseismic activity in the Central Asia test area.The paper focuses on an experimental test of the possibility of triggering the mechanical instability of a system that is close to critical state by a series of electromagnetic pulses.The mechanical system consisted of two pieces of rock;the upper piece can slip on the fixed supporting sample if the latter one is tilted up to the critical angle.In this state,the
more » ... riggering of mechanical instability by some weak impact such as electrical pulse became more probable.The slope of support in the experiment is an analogue of tectonic stress in natural conditions.The preliminary experiments,carried out in a dry environment,at the humidity of atmosphere 30-50%,show that a strong EM-pulse induces sliding of a sample of rock (granite,basalt,labradorite)placed on the supporting sample which is inclined at the slope close to,but less than,the critical angle with a probability 0.07.
doi:10.4401/ag-3532 doaj:0b28338db33546f39f5c95104af2c4aa fatcat:vadi4ypvrzanlfqdzvj2bazz4q