M-24 ELECTROMAGNETIC ENERGY VELOCITY IN MAGNETOTELLURIC SOUNDING INTERPRETATION J. MIECZNIK 1 2 and T. CZERWIŃSKI 2 1 Results of magnetotelluric measurements are usually presented as apparent resistivity curves and plots of the phase shift between the electric vector and magnetic vector versus frequency. One of the reasons of such presentation is that the amplitude sounding curves reproduce changes of real resistivity in a geoelectric medium. On the other hand in the case of 2D geoelectric medium the shape of magnetotelluric sounding curves depends on the azimuth of the measurement system. When one axis of the measurement system coincides with the


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