Seismic anisotropy of the upper crust in the mountain ranges of Taiwan from the TAIGER explosion experiment

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Title:	Seismic anisotropy of the upper crust in the mountain ranges of Taiwan from the TAIGER explosion experiment
Authors:	王乾盈;Kuo-Chen, Hao;Środa, Piotr;Wu, Francis;Wang, Chien-Ying;Kuo, Yao-Wen
Contributors:	地球科學學院地球科學學系
Keywords:	Anisotropy;Atmospheric Science;Azimuth;Broadband;Deformation;Delay;Delay time;Earth and Planetary Sciences (miscellaneous);Geological data;Geophysics;Oceanography;P waves;S waves;Seismic arrays;Upper mantle
Date:	2013-12-01
Issue Date:	2026-04-23 11:43:07 (UTC+8)
Publisher:	Chinese Geoscience Union;Taiwan: 中華民國地球科學學會
Abstract:	摘要： Taiwan is known as a strongly anisotropic region observed from SKS 1 - 2 s delay time and other teleseismic phases. An estimate of the crustal contribution to the total anisotropy from the foliated Central Range is essential to understanding the overall teleseismic results. We used P wave arrivals from the dense seismic arrays deployed during the TAIGER active source experiments and the permanent broadband seismic stations to determine the crustal anisotropy. From the arrival time analysis as a function of azimuth, we detected a clear cos(2θ) pattern. The strength of the crustal anisotropy (0 - 15 km depth) reaches 8 - 10% and the fast direction azimuth is around 35 - 43° for the overall mountain ranges. The anisotropic variations from the central to the north are found in detail. The results could indicate that the upper crustal delay time contribution of teleseismic shear waves reaches up to 0.45 s. The geological data at the surface and geophysical observations imply a coherent deformation from the surface to the lower crust or even down to the upper mantle. 出版者： Taiwan: 中華民國地球科學學會出版日期： 2013-12-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2013-12, Vol.24 (6), p.963-970 資源來源： Chinese Electronic Periodical Services (CEPS) 版權： 2013. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1017-0839 識別號： ISSN: 2223-8964 識別號： ISSN: 2311-7680 識別號： EISSN: 2311-7680 識別號： DOI: 10.3319/TAO.2013.07.30.01(T)
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