| 講演要旨(和文) | | 陸域における富士川河口断層帯の詳細な地下構造を明らかにすることを目的に、2014年2月に富士川河口地域において反射法地震探査を実施した。この地域では富士川河口断層帯が確認されており、下川他（1996）や静岡県総務部地震対策課（1996）により反射法地震探査が海岸沿いに実施され、入山瀬断層、善福寺断層がそれぞれ確認されている。今回、富士川河口から西へ海岸沿いに延長約3.5kmの測線1と、河口から約2km上流の富士川西方に東西方向の延長約1kmの測線2を設定した。探査の結果、入山瀬断層に相当すると考えられる反射面の不連続性が測線1および測線2において認められた。また、測線1の西端付近において善福寺断層に相当する反射面の不連続性が認められた。 |
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| | 講演要旨(英文) | | We conducted a seismic reflection survey to reveal the detailed structure of Fujikawa-kako fault zone around the mouth of Fuji River in February 2014. Fujikawa-kako fault zone have been identified in this area. Seismic reflection surveys were carried out along the coast by the Shimokawa et. al. (1996) and Shizuoka Pref. (1996), then the Iriyamase fault and the Zenpukuji fault were confirmed, respectively. In this time, we set two survey lines. A survey line FJK1 is located along the coastline, from the mouth of Fuji River to the west, and the length of the line is about 3.5 km. A survey line FJK2 is located from the levee of Fuji River to the west at about 2 km north from the coastline, and the length of the line is about 1 km. On the seismic section, Iriyamase fault is confirmed as a discontinuity of reflection in FJK1 and FJK2. Zenpukuji fault is confirmed as a discontinuity of reflection in near the western end of the line 1. |
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