气候变化领域集成服务门户(CCPortal): Earthquake Interactions in Central Taiwan: Probing Coulomb Stress Effects Due to ML≥ 5.5 Earthquakes From 1900 to 2017

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DOI	10.1029/2019JB019010
	Earthquake Interactions in Central Taiwan: Probing Coulomb Stress Effects Due to ML≥ 5.5 Earthquakes From 1900 to 2017
	Li S.; Wdowinski S.; Hsu Y.-J.; Shyu J.B.H.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	Though large efforts have been made in studying earthquake generation processes, earthquake triggering in central Taiwan is still not well understood. The occurrence of 14 mainshocks with ML≥ 6.0 from 1900 to 2017 and the presence of eight active fault systems provide excellent data sets for studying earthquake interaction in central Taiwan. We examined the coseismic Coulomb stress changes (ΔCFSs) due to mainshocks in the sequence and other surrounding earthquakes comprising 3 smaller magnitude mainshocks with 5.5 ≤ML≤ 6.0 and 25 aftershocks with ML≥ 5.5. When considering only triggering effects from mainshocks in the sequence, the compounded ΔCFSs are significant for all 13 mainshocks with 8 being promoted (ΔCFS > 0.1 bar) and 5 being inhibited (ΔCFS < −0.1 bar). After adding effects from other surrounding earthquakes, we found that five mainshocks were promoted and seven were inhibited. Yet it is questionable whether the 2016 mainshock was promoted, because the calculated uncertainties at the hypocenter might reduce ΔCFS below the 0.1 bar triggering threshold. In addition, significant positive ΔCFSs (>2 bars) on the Chukou, Chaochou, and Chishan faults and flat decollement of central Taiwan suggest failure promotion on those active faults. Contrarily, significant negative ΔCFSs (<−0.2 bar) on the Changhua, Shungtung, Chelungpu, and Hsinhua faults suggest that ruptures on those faults might be inhibited. We also conducted sensitivity studies indicating uncertainty level of 33–38% of the calculated ΔCFSs. Our findings indicate that preceding earthquakes have affected nucleation and rupture propagation of large earthquakes in central Taiwan during the past 120 years. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	active faults; central Taiwan; coseismic Coulomb stress change; earthquake interactions
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187704
作者单位	Institute of Environment, Department of Earth and Environment, Florida International University, Miami, FL, United States; Institute of Earth Sciences, Academia Sinica, Nankang, Taiwan; Department of Geosciences, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Li S.,Wdowinski S.,Hsu Y.-J.,et al. Earthquake Interactions in Central Taiwan: Probing Coulomb Stress Effects Due to ML≥ 5.5 Earthquakes From 1900 to 2017[J],2020,125(8).
APA	Li S.,Wdowinski S.,Hsu Y.-J.,&Shyu J.B.H..(2020).Earthquake Interactions in Central Taiwan: Probing Coulomb Stress Effects Due to ML≥ 5.5 Earthquakes From 1900 to 2017.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Li S.,et al."Earthquake Interactions in Central Taiwan: Probing Coulomb Stress Effects Due to ML≥ 5.5 Earthquakes From 1900 to 2017".Journal of Geophysical Research: Solid Earth 125.8(2020).