2012 Fiscal Year Final Research Report
Detection of temporal changes of Earth's internal structure usingseismic interferometry
| Project/Area Number |
22740289
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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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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| Project Period (FY) |
2010 – 2012
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| Keywords | 地震波速度構造 / 地震波干渉法 / 表面波 |
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| Research Abstract |
We succeeded in extraction of global body-wave propagation by cross-correlating ambient noise wave field.Using autocorrelation analysis of ocean bottom seismometers, we detected temporal changes of s wave speeds and the azimuthal anisotropy in the shallow sedimentary layer. The changes can be explained by strong motion in the layer when the grate Tohoku earthquake in 2011. We also detected the temporal changes by cross correlation analysis of V-net data deployed by NIED.
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