2015 Fiscal Year Final Research Report
Fate of the Oceanic Crust Reveled by Stochastic Seismic Wave Tomography
| Project/Area Number |
25400439
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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 |
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) |
2013-04-01 – 2016-03-31
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| Keywords | 地震 / 地球内部構造 / 散乱 / トモグラフィー |
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| Outline of Final Research Achievements |
The purpose of this project was to extend the deterministic tomography and establish the stochastic tomography using seismic waveforms. By such stochastic tomography, we can expect to resolve chemical heterogeneities that have not been well resolved by previous deterministic approaches. We developed an appropriate Monte-Carlo method to invert seismogram envelopes. Using our method and up-to-date broadband OBS (ocean bottom seismology) data, we succeeded to show the possibility that we can directly show the strong heterogeneities in the lithosphere and the strong internal attenuation in the asthenosphere. Our results should open the new way of future seismological analysis.
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| Free Research Field |
地震学
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