Spatial distribution of faults and their features in the middle Okinawa Trough on the western offshore region of Amami Oshima island.

Daishi Horiuchi; Azusa Nishizawa; Yasuhiko OHARA; Mitsuhiro Oikawa; Takafumi Hashimoto; Chiaki Okada

Presentation information

Poster

Symbol S (Solid Earth Sciences) » S-CG Complex & General

[S-CG59] Ocean Floor Geoscience

Thu. May 26, 2016 3:30 PM - 4:45 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Kyoko Okino(Ocean Research Institute, University of Tokyo), Keiichi Tadokoro(Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University), Osamu Ishizuka(Geological Survey of Japan, AIST), Tomohiro Toki(Faculty of Science, University of the Ryukyus), Narumi Takahashi(Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology)

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3:30 PM - 4:45 PM

[SCG59-P07] Spatial distribution of faults and their features in the middle Okinawa Trough on the western offshore region of Amami Oshima island.

*Daishi Horiuchi¹, Azusa Nishizawa¹, Yasuhiko OHARA¹, Mitsuhiro Oikawa¹, Takafumi Hashimoto¹, Chiaki Okada¹ (1.Hydrographic and Oceanographic Department, Japan Coast Guard)

Keywords:Okinawa Trough, fault topography, normal fault

A numerous normal faults locate on the seafloor of the middle Okinawa Trough from the recent bathymetric surveys and the multichannel reflection seismic surveys by Hydrographic and Oceanographic Department, JCG. The predominant direction of them is N60E on the western offshore area of Amami Oshima island. The central axis of graven is shifted to the northwest side from the central axis of the depression of the middle Okinawa Trough, and arranged the left-stepping en echelon.