![]() ![]() The MT data acquisition at RN-15/IDDP-2 covered the last third of the drilling period and thermo-hydraulic stimulation. Here, we add a new survey at the Reykjanes peninsular (Iceland). To date, magnetotelluric monitoring of processes during reservoir engineering of geothermal systems have been carried out only at three sites world-wide. #BIPOLAR SQUARE WAVE SKIN#It is shown that the amplitudes and the skin depth for this component substantially depend on the permeability coefficient of the medium. ![]() Wrangell, Alaska after the M = 9.0 Sumatran 2004 earthquake, the expected amplitudes of the vertical component of the coseismic electric field are found to range between dozens of μV/m and tenths to units of V/m. Based on the estimated parameters of the Rayleigh wave recorded in the region of Mt. In accordance with the Helmholtz-Smoluchowski equation, we derived the expressions for the vertical and horizontal components of the electric field strength. The first wave creates the dominant part of the electrokinetic effect on the surface. As a result, vertical component of the electric field associated with the first wave is highly sensitive to the change in the permea-bility of the surface layer, which opens the possibility of its determination from the observed seismoelectric signal. ![]() The rate of exponential decay of the first wave with depth is determined by the skin depth which, in turn, depends on the permeability coefficient of a poroelastic medium and on a number of other parameters. It is shown that the solution can be represented in the form of a sum of two waves, the first prevailing in the near-surface layer and rapidly decaying with depth, and the second covering a much greater depth interval and associated with longitudinal component of the Rayleigh wave. The problem is solved in the frequency domain with the allowance for the boundary condition on the Earth's surface. In the scope of Frenkel's equation, an analytical solution is obtained for pore pressure and elec-trokinetically induced electric field caused by the Rayleigh surface wave propagation in a poroelastic fluid-saturated medium. ![]()
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