| 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 |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
NAKAMURA Mamoru University of the Ryukyus, 理学部, 准教授 (60295293)
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| Co-Investigator(Kenkyū-buntansha) |
松本 剛 琉球大学, 理学部, 教授 (30344287)
古川 雅英 琉球大学, 理学部, 教授 (40238671)
古本 宗充 名古屋大学, 環境学研究科, 教授 (80109264)
田所 敬一 名古屋大学, 環境学研究科, 准教授 (70324390)
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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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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2007: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
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| Keywords | 地殻変動 / 海底変動 / 固体地球物理学 / 津波地震 / 地震 / プレート間カップリング / 測地 / 自然災害 / 津波 |
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| 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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