High-resolution seismic reflection profiling across the Shiraiwa fault, eastern margin of the Yokote basin fault zone, northeast Japan : data acquisition and processing
東北大学大学院理学研究科
Graduate School of Science, Tohoku University
千葉大学大学院自然科学研究科
Graduate School of Science and Technology, Chiba University
岩手大学工学部
Faculty of Engineering, Iwate University
山梨大学教育人間科学部
Faculty ofEducation and Human Sciences, Yamanashi University
愛知教育大学教育学部
Faculty of Education, Aichi University of Education
（独）産業技術総合研究所活断層研究センター
Active Fault Research Center,National Institute of Advanced Industrial Science and Technology
東京大学地震研究所
Earthquake Research Institute, the University of Tokyo
東京大学大学院理学系研究科
Graduate School of Science, the University of Tokyo
岩手大学大学院工学研究科
Graduate School of Engineering, Iwate University
東北大学理学部
Faculty of Science, Tohoku University
（株）ジオシス
Geosys Inc.
抄録
The eastern margin of the Yokote basin fault zone extends about 56km at the western foot of the Ou Backbone Range, northeast Japan. The Rikuu earthquake (M=7.2) occurred in the Ou Backbone Range (Mahiru Range) on 31st August, 1896. Associated with this earthquake, four thrust faults-Obonai, Shiraiwa, Ota, and Senya fault3 appeared on the surface of the western foot of the Mahiru Range. These faults were highly sinuous with numerous gaps and en echelon steps. We conducted a high-resolution seismic reflection profiling survey across the Shiraiwa fault. The obtained seismic reflection data were processed by conventional common mid-point methods, post-stack migration, and depth conversion. The subsurface structure across the Shraiwa fault is characterized by branched low-angle reverse faults and conjugate back-thrust. The emergent thrust associated with the 1896 earthquake is regarded to be a subsidiary reverse fault.
雑誌名
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
巻
81
号
2
ページ
129 - 138
発行年
2006
ISSN
00408972
書誌レコードID
AN00162258
フォーマット
application/pdf
日本十進分類法
051.1
出版者
東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
横手盆地東縁断層帯・白岩断層を横断する浅層反射法地震探査（2005年）: データ取得と処理について
IHO81205.pdf
(7.61MB)
