2009 Fiscal Year Final Research Report
Is the Ryukyu Subduction Zone in Japan coupled or decoupled?-The necessity of seafloor crustal deformation observation
Project/Area Number |
19340126
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Solid earth and planetary physics
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Research Institution | University of the Ryukyus |
Principal Investigator |
NAKAMURA Mamoru University of the Ryukyus, 理学部, 准教授 (60295293)
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Co-Investigator(Renkei-kenkyūsha) |
TADOKORO Keiichi 名古屋大学, 環境学研究科, 准教授 (70324390)
ANDO Masataka 琉球大学, 理学部, 客員教授 (80027292)
FURUKAWA Masahide 琉球大学, 理学部, 教授 (40238671)
MATSUMOTO Takeshi 琉球大学, 理学部, 教授 (30344287)
FURUMOTO Muneyoshi 名古屋大学, 環境学研究科, 教授 (80109264)
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Project Period (FY) |
2007 – 2009
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Keywords | 地殻変動 / 海底変動 |
Research Abstract |
We have started the observation of sea floor crustal deformation to detect the inter-plate coupling in the central Ryukyu trench. Five campaign observations were carried out for the period from January 2008 to November 2009. The result shows that the benchmark moved to northwest direction for two years at a rate of 7cm/yr. The estimated width of interplate coupling area is 30-50km from the Ryukyu trench. The interplate coupling in the central Ryukyu Trench and tsunami earthquake (which occurred 300km southwest of our site near the Ryukyu Trench) suggests that interplate coupling occurred up-dip of the seismogenic zone in the Ryukyu subduction zone.
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Research Products
(35 results)
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[Journal Article] Is the Ryukyu Subduction Zone in Japan coupled or decoupled?-The necessity of seafloor crustal deformation observation2009
Author(s)
Ando, M., Nakamura, M., Matsumoto, T., Furukawa, M., Tadokoro, K., Furumoto, M.
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Journal Title
Earth Planet Space 61
Pages: 1-9
Peer Reviewed
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[Presentation] 中部琉球海溝での海底地殻変動観測2009
Author(s)
中村衛, 田所敬一, 奥田隆, 安藤雅孝, 渡部豪, 杉本慎吾, 宮田皓司, 松本剛, 古川雅英, 尾藤原野
Organizer
日本地球惑星科学連合2009年大会
Place of Presentation
千葉市幕張メッセ
Year and Date
2009-05-17
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[Presentation] 琉球海溝における海底地殻変動観測, 地球惑星科学関連学会合同大会2008
Author(s)
中村衛, 田所敬一, 奥田隆, 安藤雅孝, 渡部豪, 杉本慎吾, 宮田皓司, 松本剛, 古川雅英, 尾藤原野
Organizer
日本地球惑星科学連合2008年大会
Place of Presentation
千葉市幕張メッセ
Year and Date
2008-05-25
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