气候变化领域集成服务门户(CCPortal): Repeating Earthquakes at the Edge of the Afterslip of the 2016 Ecuadorian MW 7.8 Pedernales Earthquake

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DOI	10.1029/2021JB021746
	Repeating Earthquakes at the Edge of the Afterslip of the 2016 Ecuadorian MW 7.8 Pedernales Earthquake
	Chalumeau C.; Agurto-Detzel H.; De Barros L.; Charvis P.; Galve A.; Rietbrock A.; Alvarado A.; Hernandez S.; Beck S.; Font Y.; Hoskins M.C.; León-Ríos S.; Meltzer A.; Lynner C.; Rolandone F.; Nocquet J.-M.; Régnier M.; Ruiz M.; Soto-Cordero L.; Vaca S.; Segovia M.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	Repeating earthquakes repeatedly rupture the same seismic asperity and are strongly linked to aseismic slip. Here, we study the repeating aftershocks of the April 16, 2016 MW 7.8 Pedernales earthquake in Ecuador, which generated a large amount of afterslip. Using temporary and permanent stations, we correlate waveforms from a one-year catalog of aftershocks. We sort events with a minimum correlation coefficient of 0.95 into preliminary families, which are then expanded using template-matching to include events from April 2015 to June 2017. In total, 376 repeaters are classified into 62 families of 4–15 events. They are relocated, first using manual picks, and then using a double difference method. We find repeating earthquakes during the whole period, occurring primarily within large aftershock clusters on the edges of the areas of largest afterslip release. Their recurrence times, shortened by the mainshock, subsequently increase following an Omori-type law, providing a timeframe for the afterslip's deceleration. Although they are linked temporally to the afterslip, repeater-derived estimates of slip differ significantly from GPS-based models. Combined with the fact that repeaters appear more spatially correlated with the afterslip gradient than with the afterslip maxima, we suggest that stress accumulation at the edge of the afterslip may guide repeater behavior. © 2021. The Authors.
英文关键词	afterslip; cross correlation; match filtering; Pedernales; repeating earthquakes; subduction
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/187119
作者单位	Université Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, IRD, GéoazurValbonne, France; Geophysical Institute (GPI), Karlsruhe Institute of Technology, Karlsruhe, Germany; Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador; Department of Geosciences, University of Arizona, Tucson, AZ, United States; Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA, United States; Department of Earth Sciences, University of Delaware, Newark, DE, United States; Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France
推荐引用方式 GB/T 7714	Chalumeau C.,Agurto-Detzel H.,De Barros L.,et al. Repeating Earthquakes at the Edge of the Afterslip of the 2016 Ecuadorian MW 7.8 Pedernales Earthquake[J],2021,126(5).
APA	Chalumeau C..,Agurto-Detzel H..,De Barros L..,Charvis P..,Galve A..,...&Segovia M..(2021).Repeating Earthquakes at the Edge of the Afterslip of the 2016 Ecuadorian MW 7.8 Pedernales Earthquake.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Chalumeau C.,et al."Repeating Earthquakes at the Edge of the Afterslip of the 2016 Ecuadorian MW 7.8 Pedernales Earthquake".Journal of Geophysical Research: Solid Earth 126.5(2021).