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| | Abstract | | Magnetotelluric method is an electromagnetic method for deep subsurface exploration using a perturbation of natural electromagnetic field. The most serious problem of MT data analysis at a surrounding region of urban area is to reduce a heavy noise from observed data. A new approach to reduce a heavy noise of time series data is presented in this paper. The cepstrum analysis was used to remove a noise from raw MT data which was observed at Ito campus of Kyushu University. As a result of experiment using field data, it was found that cepstrum analysis was effective to get smooth MT impedance after removing a noise of MT data. |
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