A first modeling of dynamic and static crustal strain field from near-field dilatation measurements: example of the 2013 \(M_w\) 6.2 Ruisui earthquake, Taiwan

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• 作者：Alexandre Canitano ; Ya-Ju Hsu ; Hsin-Ming Lee ; Alan T. Linde…
• 关键词：Near ; field strainmeter data ; Dynamic and static crustal deformation modeling ; Seismic source properties ; Longitudinal Valley Fault
• 刊名：Journal of Geodesy
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：91
• 期：1
• 页码：1-8
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Geophysics/Geodesy; Earth Sciences, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-1394
• 卷排序：91

文摘

We analyze the high-resolution dilatation data for the October 2013 \(M_w\) 6.2 Ruisui, Taiwan, earthquake, which occurred at a distance of 15–20 km away from a Sacks–Evertson dilatometer network. Based on well-constrained source parameters (\(\hbox {strike}=217^\circ \), \(\hbox {dip}=48^\circ \), \(\hbox {rake}=49^\circ \)), we propose a simple rupture model that explains the permanent static deformation and the dynamic vibrations at short period (\(\sim \)3.5–4.5 s) for most of the four sites with less than 20 % of discrepancies. This study represents a first attempt of modeling simultaneously the dynamic and static crustal strain using dilatation data. The results illustrate the potential for strain recordings of high-frequency seismic waves in the near-field of an earthquake to add constraints on the properties of seismic sources.