2010 Fiscal Year Final Research Report
Quantification of the crust and mantle heterogeneity and construction of a simulation model for broadband strong ground motions
| Project/Area Number |
20540405
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NISHIMURA Takeshi 東北大学, 理学系研究科, 准教授 (40222187)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIDA Kiwamu 東京大学, 地震研究所, 助教 (10345176)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 地震災害・予測 / 地震 / シミュレーション / 地殻 / 不均質構造 |
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| Research Abstract |
In this study we quantified the crust and mantle heterogeneity, and constructed a broadband strong ground motion simulation model. The distribution characteristic of the small-scale heterogeneities of the scale several kilometers or less in the subsurface structure is evaluated based the analysis of regional seismograms obtained by the Hi-net high-density seismic network from two points : 1) frequency dependency and the distance dependence of collapse of the apparent S-wave radiation pattern and 2) relative strength of the P-wave amplitude in the Transverse component. We developped a high-performance broadband simulation model and large scale simulation was conducted using the Earth Simulator supercomputer.
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