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| | Abstract | | Surface wave tomography has been widely used as well as P- or S-wave travel time tomography using natural earthquakes, because of development of large-scale seismic networks. Surface wave tomography is also applied to local seismic network in order to estimate high-resolution shallow crustal structure. In Japan, it is important to understand the detailed crustal structure, because earthquakes are occurring inland where no active faults were found. Therefore, we applied surface wave tomography to local dense seismic network in San-in area located in southwest Japan in order to estimate three-dimensional S-wave velocity structure. Our velocity structure revealed small scale heterogeneities at shallow crust such as faults and geological boundary. |
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