气候变化领域集成服务门户(CCPortal): Probing the Variation in Aseismic Slip Behavior Around an Active Suture Zone: Observations of Repeating Earthquakes in Eastern Taiwan

CCPortal

DOI	10.1029/2019JB018561
	Probing the Variation in Aseismic Slip Behavior Around an Active Suture Zone: Observations of Repeating Earthquakes in Eastern Taiwan
	Chen Y.; Chen K.H.; Hu J.-C.; Lee J.-C.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	An examination of repeating earthquakes in eastern Taiwan revealed previously unrecognized quasiperiodic repetition of aseismic creep along two reverse faults in an active suture zone. Using 202 ML 2.0 to 4.6 repeating earthquake sequences (RES) during the period from 2000 to 2011, we studied where and how certain faults creep. The RES were found to be highly concentrated in the southern segment of the Longitudinal Valley fault (LVF) and in the northern segment of the Central Range fault (CRF). They are mainly located at a depth of 10–25 km and show strong regional differences in creep behavior. Using the moment release rate of RES and geodetically derived long-term slip rate, we re-estimate the empirical relationship between deep creep and seismic moment for creeping sections in eastern Taiwan. For the 30-km-long LVF, the creep rate increased dramatically from 1.5 to 12.3 cm/year under the influence of the ML 6.4 Chengkung earthquake of 2003. For the 80-km-long CRF, the high creep rate of 4.3 cm/year appears to have been stable over time and is descriptive of a previously unrecognized deep structure underneath the eastern flank of the Central Range. The quasiperiodic pulsing of the deep slip rate has a predominant interval of 1 year for both segments. After the ML 6.4 event, the predominant interval for the creeping LVF halved in duration. The time-dependent aseismic slip showed a strong correlation with the creepmeter data, suggesting that the positing of a common mechanism is needed to connect the surface and deep creep variation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aseismic creep; Central Range fault; creep rate; Longitudinal Valley fault; quasiperiodic pulsing; repeating earthquake
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/187874
作者单位	Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan; Institut des Sciences de la Terre (ISTerre), Université Grenoble Alpes, Grenoble, France; Department of Geosciences, National Taiwan University, Taipei, Taiwan; Institue of Earth Sciences, Academia Sinica, Taipei, Taiwan
推荐引用方式 GB/T 7714	Chen Y.,Chen K.H.,Hu J.-C.,et al. Probing the Variation in Aseismic Slip Behavior Around an Active Suture Zone: Observations of Repeating Earthquakes in Eastern Taiwan[J],2020,125(5).
APA	Chen Y.,Chen K.H.,Hu J.-C.,&Lee J.-C..(2020).Probing the Variation in Aseismic Slip Behavior Around an Active Suture Zone: Observations of Repeating Earthquakes in Eastern Taiwan.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Chen Y.,et al."Probing the Variation in Aseismic Slip Behavior Around an Active Suture Zone: Observations of Repeating Earthquakes in Eastern Taiwan".Journal of Geophysical Research: Solid Earth 125.5(2020).