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| | Abstract | | We applied seismic interferometry to strong motion records for S-wave velocity structure exploration in Narita, Chiba prefecture, Japan. We observed clear reflected waves by applying spectral whitening which remove the effects of source and path. The image of a number of autocorrelation functions for non-selection of strong motion records highlights the reflected wave and make it stable. An investigation of theoretical Green's function demonstrates the importance of the undulation frequency which related to the arrival time of reflected waves. This theoretical understanding of the characteristics of autocorrelation function helps the data processing method and setting of parameters especially for the bandpass filter for seismic interferometry. |
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