2016 Fiscal Year Final Research Report
Ocean bottom pressure gauge array for studying phenomena involving the ocean and solid Earth as a system
| Project/Area Number |
25247074
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
FUKAO Yoshio 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 特任上席研究員 (10022708)
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| Co-Investigator(Kenkyū-buntansha) |
西田 究 東京大学, 地震研究所, 准教授 (10345176)
日比谷 紀之 東京大学, 理学(系)研究科(研究院), 教授 (80192714)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIDA Kiwamu 東京大学, 地震研究所, 准教授 (10345176)
ITO Aki 国立研究開発法人海洋研究開発機構, 地球深部ダイナミクス研究分野, 技術研究員 (90371723)
YAMASHITA Mikiya 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 研究員 (00415978)
TONEGAWA Takashi 国立研究開発法人海洋研究開発機構, 地震津波海域観測研究開発センター, 研究員 (60610855)
SHIOBARA Hajime 東京大学, 地震研究所, 教授 (60211950)
HIBIYA Toshiyuki 東京大学, 大学院理学研究科(理学部), 教授 (80192714)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | 海底地震 / 津波 / 津波地震 / 海底圧力計 / 海底加速度計 / 海洋内部潮汐 / 海洋重力波 / 常時自由振動 |
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| Outline of Final Research Achievements |
We constructed 10 sets of ocean bottom pressure gauges using quartz crystal resonator sensors which measure the ocean bottom pressure with a nano-resolution at a water depth of 7000m.We deployed these pressure gauges as an array at the ocean bottom east off Aogashima for 1 year period from May 2014, and then far east off Torishima for the next 1 year from May 2015. We also deployed the ocean bottom 3-component accelerometer off Miyagi, northern Honshu for 10 months from May 2013. This accelerometer was newly developped using a quartz resonator technique. We analyzed the retrieved data to detect hitheto unreported phenomena such as "Oceanic bores upsloping the Japan Trench slope", "Tsunamis generated by a volcanic tsunami earthquake", "Ocean internal tidal waves orinating from the eastern slope of the East Aogashima knoll" and "A group of ultra-low-frequency thrust earthquakes occurring along the northern Bonin trench".
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| Free Research Field |
地震学
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