| Co-Investigator(Kenkyū-buntansha) |
藏下 英司 東京大学, 地震研究所, 准教授 (00302620)
三浦 誠一 国立研究開発法人海洋研究開発機構, 海域地震火山部門(地震発生帯研究センター), 調査役 (00371724)
汐見 勝彦 国立研究開発法人防災科学技術研究所, 地震津波火山ネットワークセンター, 総括主任研究員 (20500375)
中島 淳一 東京工業大学, 理学院, 教授 (30361067)
上嶋 誠 東京大学, 地震研究所, 教授 (70242154)
市原 寛 名古屋大学, 環境学研究科, 講師 (90553074)
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| Budget Amount *help |
¥286,390,000 (Direct Cost: ¥220,300,000、Indirect Cost: ¥66,090,000)
Fiscal Year 2020: ¥104,520,000 (Direct Cost: ¥80,400,000、Indirect Cost: ¥24,120,000)
Fiscal Year 2019: ¥98,020,000 (Direct Cost: ¥75,400,000、Indirect Cost: ¥22,620,000)
Fiscal Year 2018: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2017: ¥28,600,000 (Direct Cost: ¥22,000,000、Indirect Cost: ¥6,600,000)
Fiscal Year 2016: ¥43,420,000 (Direct Cost: ¥33,400,000、Indirect Cost: ¥10,020,000)
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| Outline of Final Research Achievements |
Three dimensional structures of seismic velocity and electric resistivity around the Bungo Channel region, where various types of slow earthquakes have been observed, were obtained through integrated analyses of seismic and electromagnetic observation and surveys over the onshore and offshore regions. These structures are mutually consistent in that they show large amount of fluid around the activity of both deep and shallow tectonic tremors under the onshore and offshore regions, respectively. Under eastern Shikoku, it has been shown that a subducting seamount determines the up-dip limit of the deep tectonic tremor activity. In the central part of the Nankai Trough off the Kii Peninsula, offshore continuous seismic monitoring revealed spatiotemporal changes of fluid distribution within the subsurface structure along the slow slip event cycle.
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