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| | Abstract | | The earthquake, M6.7 occurred at northern part of Nagano prefecture on 22nd November, 2014. This earthquake have caused damages on Hakuba Village and Otari Village in Nagano central Japan. The hypocentral region is located along the Kamishiro fault near the Itoigawa-Shizuoka tectonic line. The surface ruptures caused by the earthquake were found mostly along the previously-mapped Kamishiro fault. The length of surface rupture is reported as 9km. Seismic reflection survey had been carried out in southern part of Hakuba previously. In this time, we carried out seismic reflection survey in northern part of Hakuba in order to reveal the relationship between the surface raptures and geological structure at depth. From the seismic section, discontinuity of reflector caused by the Kamishiro fault is coincident with surface rupture. |
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