S-wave velocity structures of the Taipei Basin, Taiwan, using microtremor array measurements

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题名:	S-wave velocity structures of the Taipei Basin, Taiwan, using microtremor array measurements
作者:	Huang, Huey-Chu Wu, Cheng-Feng Lee, Feng-Mei Hwang, Ruey-Der
贡献者:	Dept Geol
关键词:	Taipei Basin Microtremor array measurement Frequency-wavenumber (F-K) spectrum method Surface wave inversion technique
日期:	2015-04
上传时间:	2015-10-30 13:43:28 (UTC+8)
摘要:	The S-wave velocity structures of the Taipei Basin in Taiwan are investigated using the array records of microtremors at 15 sites. Dispersion curves at these sites are calculated using the frequency-wavenumber (F-K) spectrum method. The S-wave velocity structures in the Taipei Basin are then estimated by employing surface wave inversion technique. Harder strata sites have higher phase velocities than softer sites. If the S-wave velocity of the Tertiary Basement is assumed to be 1000 m/s, then the Quaternary alluvial thicknesses in the Taipei Basin are between about 100 m and 650 m. The thickness of the alluvium gradually increases from the southeast to the northwest. The inversion results are also in good agreement with well-logging data and seismic reflection studies of the Taipei Basin. The study concludes that microtremor array measurement is a useful tool for estimating S-wave velocity structure. (C) 2015 Elsevier Ltd. All rights reserved.
關聯:	JOURNAL OF ASIAN EARTH SCIENCES 卷: 101 頁碼: 1-13
显示于类别:	[地質系] 期刊論文

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