2016 Fiscal Year Final Research Report
QUASI REAL-TIME TSUNAMI SOURCE INVERSION USING A BAYESIAN INFORMATION CRITERION FOR STRIKE, DIP AND SPATIAL SLIP DISTRIBUTION OF A FAULT
| Project/Area Number |
26420493
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Hydraulic engineering
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| Research Institution | Niigata University |
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Principal Investigator |
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| Research Collaborator |
IMANARI Junichi
KURODA Kohei
ISHIBASHI Kunihiko
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 津波波源 / インバージョン / 地殻変位 / ベイズ情報量基準 / GNSS / 断層モデル / 精度評価 |
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| Outline of Final Research Achievements |
The numerical simulation was carried out to evaluate the accuracy of a source inversion with crustal displacement data, and to reveal that the accuracy depends on the distances between the locations of the fault and the observation point. We developed a new inversion method to estimate a fault model of seismic sources from geodetic data, using Akaike’s Bayesian Information Criterion. The inversion method provides not only the distributions of fault slip, optimal hyper-parameters, but also strike and dip of a fault by minimizing ABIC. The estimated strike and dip agree well with the true values of them through the numerical experiments. The estimated distributions of fault slip were compared with the target distributions and show generally good agreement with them even if noise is contaminated.
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| Free Research Field |
水工学
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