气候变化领域集成服务门户(CCPortal): S Coda and Rayleigh Waves From a Decade of Repeating Earthquakes Reveal Discordant Temporal Velocity Changes Since the 2004 Sumatra Earthquake

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DOI	10.1029/2020JB019794
	S Coda and Rayleigh Waves From a Decade of Repeating Earthquakes Reveal Discordant Temporal Velocity Changes Since the 2004 Sumatra Earthquake
	Yu W.; Lin J.-T.; Su J.; Song T.R.A.; Kang C.-C.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	Temporal changes in the subsurface seismic velocity structure reflect the physical processes that modulate the properties of the media through which seismic waves propagate. These processes, such as healing of the surface damage zone and deep crustal deformation, are described by similar functional forms and operate on similar timescales, making it difficult to determine which process drives the observed changes. We examine earthquake-induced velocity changes using the measured lag-time time series τ(t) of the repeating earthquake sequences since the 2004 Mw 9.2 Sumatra and 2005 Mw 8.6 Nias earthquakes. The S coda velocity changes (δVS, equivalent to −τS) recover steadily during the 2005–2015 period. The Rayleigh wave velocity changes (δVLR, or −τLR) undergo transient recovery, followed by a strong δVLR reduction in late 2007. δVS recovery is most likely driven by deep processes, whereas the temporal breaks in δVLR recovery in 2007 mostly reflect surface damage and healing induced by the strong ground motions of the 2004 Mw 9.2, 2005 Mw 8.6, 2007 Mw 8.4, and Mw 7.9 Bengkulu and 2008 Mw 7.3 Simeulue earthquakes. The observed differences between the temporal variations in δVS and δVLR can distinguish deep processes from healing of the surface damage zone. ©2020. The Authors.
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/187746
作者单位	Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Department of Earth Sciences, University College London, London, United Kingdom; Department of Natural Sciences and Sustainable Development, Ministry of Science and Technology, Taipei, Taiwan
推荐引用方式 GB/T 7714	Yu W.,Lin J.-T.,Su J.,et al. S Coda and Rayleigh Waves From a Decade of Repeating Earthquakes Reveal Discordant Temporal Velocity Changes Since the 2004 Sumatra Earthquake[J],2020,125(7).
APA	Yu W.,Lin J.-T.,Su J.,Song T.R.A.,&Kang C.-C..(2020).S Coda and Rayleigh Waves From a Decade of Repeating Earthquakes Reveal Discordant Temporal Velocity Changes Since the 2004 Sumatra Earthquake.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Yu W.,et al."S Coda and Rayleigh Waves From a Decade of Repeating Earthquakes Reveal Discordant Temporal Velocity Changes Since the 2004 Sumatra Earthquake".Journal of Geophysical Research: Solid Earth 125.7(2020).