Abstract
AbstractMagnetotelluric (MT) responses some times show scattering at individual frequencies with big error bar or shape distortion etc, which reduces the effectiveness of MT curves in describing underground electrical structures. This paper uses higher‐order statistics method to test the Gaussianity of MT signals. The results show that the signals are non‐Gaussian. On the basis that the higher‐order statistics vanish of any Gaussian process, this paper uses higher‐order spectra to reconstruct power spectra, then estimate MT responses using reconstructed power spectra, to effectively suppress Gaussian colored noise. Synthetic tests show that the method presented by this paper is superior to traditional power spectral method in suppressing Gaussian colored noise.
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