2017 Fiscal Year Final Research Report
| Project/Area Number |
25257204
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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 | 海外学術 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
大園 真子 北海道大学, 理学(系)研究科(研究院), 非常勤研究員 (10623837)
宮町 宏樹 鹿児島大学, 理工学域理学系, 教授 (30182041)
谷岡 勇市郎 北海道大学, 理学(系)研究科(研究院), 准教授 (40354526)
蓬田 清 北海道大学, 理学研究院, 教授 (70230844)
吉澤 和範 北海道大学, 理学研究院, 准教授 (70344463)
中尾 茂 鹿児島大学, 理工学域理学系, 教授 (90237214)
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| Research Collaborator |
ICHIYANAGI Masayoshi
YAMAGUCHI Teruhiro
GORDEEV Evgeny
BYKOV Victor
GERASIMENKO Mikhail
SHESTAKOV Nikolay
VASILENKO Nikolay
PRYTKOV Alexandr
LEVIN Yuri
VALENTINE Mikhaylov
KOSTYLEV Dmitrii
CHEBROV Danila
SEROVETNIKOV Sergey
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| Project Period (FY) |
2013-04-01 – 2018-03-31
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| Keywords | 長期広域余効変動 / プレート運動 / 上部マントル構造 / 粘弾性構造 / 地震観測 / GNSS観測 / 歴史地震 |
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| Outline of Final Research Achievements |
Seismic and GNSS observation had been carried out in northeastern Asia with Russian institutions. Significant regional post-seismic crustal deformation has been detected. Postseismic displacements exceeded co-seismic one in Prymorie stations. Detailed seismic tomographic image using broadband seismograms clearly detected seismic velocity structure beneath Japan Sea. Viscoelastic structure estimation using geodetic and seismic information was performed. Misfit between calculated and observed postseismic displacements might request to construct more complex structure. Our model allow to estimate regional postseismic signals due to historical past great earthquakes in Japan Islands. Estimated viscoelastic parameters had predicted great subduction earthquakes around Japan generated regional and long-term deformation in northeast Asia. This fact suggested current crustal deformation field in continent has been strongly affected by distant subduction earthquakes.
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| Free Research Field |
固体地球物理学
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