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| | Abstract | | 3-D seismic reflection survey is put to practical use in the field of exploitation of resources, and there are the results by exclusive investigation ship in a subduction area in the field of scientific research. In this study, we carried out 3-D high resolution seismic reflection survey in a region including sea side terminal part of Fukozu fault which was earthquake fault of Mikawa Earthquake (1945, M6.8). A water gun (chamber = 15cbi, shot interval =2.5m) was used as a source. Six short streamers (5m space 2ch specifications =5, 2.5m space 12ch specifications =1) were towed by a stand ship (25m in width). As a result, the state that fault which gave the bottom of the sea displacement canceled the displacement transitionally was recognized as an extinction process of deformation with fault. |
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