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| | Abstract | | After big earthquake of Noto Hanto, we acquired the aftershock data for four days with 156 channel geophones to image the structure of survey area. We acquired totally about 30 hour data and the longest record among them is 6 hour at once. Seismic interferometry method has advantages like this case where there are no exact information about the position and the beginning time of the source. The synthetic zero-offset reflection data are made by the auto correlation of observed records. Conventional reflection imaging techniques like gain control, stacking and so on, are accompanied to get final substructure image. |
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