S Wave Attenuation in the Vicinity of Ground Surface
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- ODA Hitoshi
- Geophysical Institute, Faculty of Science, Tohoku University
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- SATO Tamao
- Geophysical Institute, Faculty of Science, Tohoku University
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- YAMAMOTO Kiyohiko
- Geophysical Institute, Faculty of Science, Tohoku University
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- HIRASAWA Tomowo
- Geophysical Institute, Faculty of Science, Tohoku University
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- MITSUZUKA Takashi
- Geophysical Institute, Faculty of Science, Tohoku University
Bibliographic Information
- Other Title
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- 地表層付近におけるS波の減衰
- チ ヒョウソウ フキン ニ オケル Sハ ノ ゲンスイ
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Abstract
Quality factor, QS, of attenuation for shear waves in the vicinity of ground surface is estimated by spectral analysis of body waves from micro-earthquakes observed at Mitsumata in Akita prefecture. The analysis is made for thirty earthquakes, in which S-P times are between 1 and 2sec.<br>Based on some reasonable assumptions, it is found that the value of QS can be easily estimated from the average slope of spectral amplitude ratio between the direct P or S wave and the S or P wave converted at the boundary of the surface layer and the substratum. The result indicates that QS in the surface layer takes a value from 5 to 20 in the frequency range between 6 and 30Hz.
Journal
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- Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
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Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 30 (3), 275-282, 1977
SEISMOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204303922944
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- NII Article ID
- 130006785034
- 40001525863
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- NII Book ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
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- NDL BIB ID
- 1918211
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed