Estimations of the S-wave velocity structures in Chia-Yi City, Taiwan, using the array records of microtremors
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- Huang Huey-Chu
- Institute of Seismology, National Chung Cheng University
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- Wu Cheng-Feng
- Institute of Seismology, National Chung Cheng University
書誌事項
- タイトル別名
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- Estimations of the <I>S</I>-wave velocity structures in Chia-Yi City, Taiwan, using the array records of microtremors
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説明
Shear-wave velocities (VS) have been widely used for the site characterization of earthquake ground motion. We report here our investigation of the S-wave velocity structures of Chia-Yi City, Taiwan using the array records of microtremors at seven sites. The dispersion curves at these sites were first calculated using the F-K method proposed by Capon (1969); the S-wave velocity structures in Chia-Yi City were then estimated by employing the surface wave inversion technique (Herrmann, 1991). At frequencies lower than about 1 Hz, the propagation directions are concentrated in the northwest and southwest quadrants. The generation of these may be attributed to the ocean waves of the Taiwan Strait. The harder site (CBA) has higher phase velocities, while the softer sites (CWB, SHP and YRU) have lower phase velocities, especially at frequencies between 1 and 5 Hz. The shallow velocity structures (0-1, 500 m) can be roughly divided into four to five layers. The depth of the alluvium gradually increases from east to west and from north to south.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 58 (11), 1455-1462, 2006
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681490515328
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- NII論文ID
- 10024495259
- 130003781127
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 8598386
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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