Abstract

Abstract In the magnetotelluric analysis proposed by Cagniard, a resistivity profile of a homogeneous stratified earth is determined from the ratio of the tangential components of the natural electric and magnetic field fluctuations at the surface of the Earth. Two methods of this analysis are discussed and applied to measurements made in the Wairarapa. One method gives a conducting surface layer of 4 km followed by a highly resistive substratum; the other gives a discontinuity at 14 km.

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