2011 Fiscal Year Final Research Report
Development and application of new imaging methods for small-scale heterogeneities in the crust and estimation of their physical properties
| Project/Area Number |
21540425
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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 | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 微細不均質性 / 微細不均質性 / 散乱理論 / 数値実験 / イメージング |
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| Research Abstract |
With array analysis of high-frequency seismic wave records scattered by small-scale heterogeneities in the crust, researchers have imaged their spatial distributions in the past. We show it possible to estimate some of their physical properties based on wave phenomena. In addition, we pay attention to the fact that there are both phase delay and advance, corresponding to scatterings of low-and high-velocity heterogeneities, respectively, which is in contrast with phase delay only in other research fields such as optics, electromagnetism and acoustic waves. In such a case, scattered waves are not always caustic but it can be explained by the concept of time-reversed phases depending on velocity anomalies of heterogeneities.
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Research Products
(30 results)
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[Journal Article] Mizutani, Capability of the penetrator seismometer system for lunar seismic event observation2009
Author(s)
Yamada, R., I. Yamada, H. Shiraishi, S. Tanaka, Y. Takagi, N. Kobayashi, N. Takeuchi, Y. Ishihara, H. Murakami, K. Yomogida, J. Koyama, A. Fu jimura, H. Mizutani
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Journal Title
Planet. Space Sci
Volume: 57
Pages: 751-763
Peer Reviewed
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