1997 Fiscal Year Final Research Report Summary
A practical study on an exploration technique using microtremors by spatial auto-correlation method
| Project/Area Number |
08680479
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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 |
Natural disaster science
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| Research Institution | Iwate University |
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Principal Investigator |
SAITO Tokumi Iwate University, Faculty of Engineering, Proffesor, 工学部, 教授 (20113855)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Hidekazu Iwate University, Faculty of Engineering, research assosiate, 工学部, 助手 (00250639)
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| Project Period (FY) |
1996 – 1997
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| Keywords | microtremor array observation / phase velocities / spatial auto-correlation method / higher mode of surface waves |
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| Research Abstract |
Spatial auto-correlation method, which is the method to determine phase velocities of surface waves in microtremors, has a potential to estimate deep structure with small seismometer array because the detectable range of wavelength by spatial auto-correlation method is larger than by frequency-wavenumber method. The following results were investigated for a practical use of spatial auto-correlation method.
1.Development of observation system using datalogger
2.Improvement of spatial auto-correlation method to determine phase velocities with high accuracy using auto-regressive model.
3.Discussion about seismometer array shape.
4.Comparison of detectable range of wavelength using spatial auto-correlation method or frequency-wavenumber method.
5.Improvement of spatial auto-correlation method to distinguish higher mode of surface waves in microtremors.
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Research Products
(8 results)
