| 講演要旨(和文) | | 2007年の3月に発生した能登半島地震の余震を測定し、探査領域の地下構造を調べた。30日から4日間で約30時間のデータの得、その内一番長時間の観測が6時間である。我々はこのデータにたいし地震波干渉法という手法を用いて合成記録を得ることが出きた。合成は記録が得た後は従来の反射波処理によって探査領域の地下構造をイメージする。 |
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| | 講演要旨(英文) | | 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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