Interplate coupling and backarc spreading in the northernmost district of Nansei-islands, Japan -Geodetic and seismological observations at the Uji-island-
| Project/Area Number |
24540458
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Kagoshima University |
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Principal Investigator |
GOTO Kazuhiko 鹿児島大学, 理工学域理学系, 教授 (20244220)
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| Co-Investigator(Kenkyū-buntansha) |
中尾 茂 鹿児島大学, 理工学域理学系, 教授 (90237214)
八木原 寛 鹿児島大学, 理工学域理学系, 助教 (60295235)
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| Project Period (FY) |
2012-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2016: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2015: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2014: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Keywords | プレート間カップリング / 南西諸島 / 沖縄トラフ / GNSS観測 / 地震観測 / 南西 / GPS観測 / ＧＰＳ観測 |
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| Outline of Final Research Achievements |
The geodetic and seismological observations at Uji-island located at the rim of the Okinawa-trough in the northernmost district of the Nansei-islands reveal that the north end region of the Okinawa-trough is enlarged at speed of approximately 5mm/yr and the seismic activity of the south side region than around 31.5°N was low for the events of magnitude larger than 1.5 in the period after at least 2002. This low seismic activity, however, changed completely by the occurrence of earthquake of M7.1 west off Satsuma-peninsula on November 14, 2015, which is the largest event in the northern region of Okinawa trough in the past. The characteristic of the larger earthquakes occur in this region becomes clear for the first time by analyzing this M7.1 event, in which the data of the nearest observation station Uji-island play an important role.
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Report
(6 results)
Research Products
(3 results)
