Slab-induced waveform effects as revealed by the TAIGER seismic array: Evidence of slab beneath central Taiwan

NCUIR > College of Earth Sciences > Department of Earth Sciences > journal & Dissertation > Item 987654321/104199

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104199

Title:	Slab-induced waveform effects as revealed by the TAIGER seismic array: Evidence of slab beneath central Taiwan
Authors:	陳伯飛;Chen, Po-Fei;Bina, Craig R.;Kuo-Chen, Hao;Wu, Francis T.;Wang, Chien-Ying;Huang, Bor-Shouh;Chen, Chau-Huei;Liang, Wen-Tzong
Contributors:	地球科學學院地球科學學系
Keywords:	Broadband linear array;Pseudospectral method;Slab-induced waveform effects;TAIGER
Date:	2012-04-01
Issue Date:	2026-04-23 11:45:26 (UTC+8)
Publisher:	Elsevier;Elsevier B.V
Abstract:	摘要： ► We are the first one to use dense linear array in Taiwan to study waveform effects of receiver-side slab. ► The measurements of pulse width by Gaussian fitting are also our invention. ► We also first point out the waveform effects of slab are different between source side and receiver side. ► Observations confirm the existence of slab beneath central Taiwan. Here we tackle a tectonically important question – the upper mantle velocity structure beneath central Taiwan – with seismically interesting observations – receiver-side slab waveform effects. We use teleseismic P waveforms of the NS broadband array deployed by the TAIGER project to examine patterns of variation in arrival time, pulse width, and amplitude – measuring the first two by Gaussian fitting – and contrast measurements of earthquakes to the southeast (SE earthquakes) with those of one Sumatra earthquake in order to focus on upper mantle heterogeneities. Overall variation patterns as a function of earthquake are compatible with ray-tracing predictions. Relative reduced arrival times and amplitudes at central Taiwan stations suggest the existence of a deep aseismic slab below. From simulations of 2-D wave propagation, we conclude that lateral heterogeneity of crust and uppermost mantle primarily contributes to variations in arrival time and only secondarily to variations in amplitude and pulse width. Furthermore, discrepancies between source-side and receiver-side waveform effects, where the latter are not always amplitude-reduced, are explained by constructive interference between the fast and slow phase. Thus, the use of full waveform information can provide independent constraints to complement results of previous studies. A future extension will be to incorporate S waves and apply waveform inversion to yield quantitative constraints. 出版者： Elsevier B.V 出版日期： 2012-04 出處： Physics of the Earth and Planetary Interiors, 2012-04, Vol.196-197, p.62-74 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2012 Elsevier B.V. 識別號： ISSN: 0031-9201 識別號： EISSN: 1872-7395 識別號： DOI: 10.1016/j.pepi.2012.02.004
Appears in Collections:	[Department of Earth Sciences ] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	17	View/Open

社群 sharing

Loading...