2013 Fiscal Year Final Research Report
Strong-motion prediction for islands
| Project/Area Number |
23310122
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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 |
Natural disaster science
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| Research Institution | Okayama University (2013)
Kyushu University (2011-2012) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OKAMOTO Taro 東京工業大学, 大学院・理工学研究科, 助教 (40270920)
YAMADA Nobuyuki 福岡教育大学, 教育学部, 准教授 (80334522)
YAMADA Nobuyuki 独立行政法人海洋研究開発機構, 地震津波・防災プロジェクト, 技術研究副主任 (40435847)
TOYOKUNI Genti 東北大学, 大学院・理学研究科, 助教 (90626871)
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| Research Collaborator |
MURAKOSHI Takumi 防衛大学校, 応用科学群地球海洋学科, 助教
FUJIOKA Akira 九州大学, 大学院・理学府, 大学院生
UEDA Takuya 九州大学, 大学院・理学府, 大学院生
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 地震動 / 南西諸島 / 強震動予測 / 地震防災 / 地下構造モデル |
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| Research Abstract |
Japan consists of many islands. From the point of view of disaster prevention, it is also important to improve the precision of strong ground motion prediction for the islands. The Ryukyu Islands are a typical example of such islands. In this study we build a 3D numerical structure model for modeling of strong ground motion, which includes land and ocean-bottom topographies and a seawater layer as well as subsurface structures of the arc side and the PHS slab, partially based on the existing models for near-surface structure and a slab-top depth of the PHS. We then try to improve the near-surface structure model in the islands using the microtremor surveys we conducted originally in this project. We then simulate seismic wave propagation for three sub-oceanic earthquakes which occurred near the Amami Islands, Okinawa Island and Miyako Island to confirm the applicability of the constructed structure model.
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