气候变化领域集成服务门户(CCPortal): Dynamic triggering of earthquakes in the North Island of New Zealand following the 2016 Mw 7.8 Kaikōura earthquake

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DOI	10.1016/j.epsl.2020.116723
	Dynamic triggering of earthquakes in the North Island of New Zealand following the 2016 Mw 7.8 Kaikōura earthquake
	Yao D.; Peng Z.; Kaneko Y.; Fry B.; Meng X.
发表日期	2021
ISSN	0012821X
卷号	557
英文摘要	Large earthquakes are capable of triggering microseismicity, deep tremor and slow-slip events from intermediate- to long-distance ranges. Unfortunately, earthquake catalogs are typically incomplete right after large mainshocks. Hence, mapping triggering patterns and understanding the underlying triggering mechanism are challenging. Here we present two different types of seismicity responses to dynamic stressing by passing seismic waves in the North Island of New Zealand following the 2016 Mw 7.8 Kaikōura earthquake. Based on a template matching technique, we identify up to 4-7 times more earthquakes than listed in New Zealand's GeoNet catalog. We also compute the dynamic stress perturbations in the North Island due to the Kaikōura mainshock and compare them to seismicity rate changes to identify regions with high susceptibility to dynamic stress triggering. Abundant triggered earthquakes occurred immediately following the mainshock in the shallow crust around the active Taupo Volcano Zone, likely related to activation of crustal faults/fluids associated with back-arc rifting and volcanism. Approximately 8 days after the initial dynamic stressing, an active burst of seismicity with the largest event of ML 5.55 occurred along the shallow megathrust near Porangahau on the east coast of the North Island. This burst of seismicity is likely driven by a ∼Mw 7.1 shallow slow slip event dynamically triggered by the mainshock. Our findings reveal the heterogeneous nature of dynamic triggering in a plate boundary region with recent large earthquake sequences and aseismic transient events and further highlight the difficulties in time-dependent earthquake forecasting following large mainshocks. © 2020 Elsevier B.V.
关键词	dynamic stress modeling dynamic triggering earthquake detection Kaikōura earthquake slow-slip event Taupo Volcano Zone
英文关键词	Seismic waves; Template matching; Dynamic stressing; Dynamic triggering; Earthquake catalogs; Earthquake forecasting; Large earthquakes; Template matching technique; Triggered Earthquakes; Triggering mechanism; Earthquakes; detection method; dynamic analysis; earthquake catalogue; earthquake event; earthquake trigger; numerical model; seismic wave; seismicity; stress analysis; trigger mechanism; Kaikoura; Marlborough; New Zealand; North Island; South Island; Taupo Volcanic Zone
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203351
作者单位	Earth and Environmental Sciences, College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; GNS Science, Lower Hutt, New Zealand; Kyoto University, Kyoto, Japan; Southern California Earthquake Center, University of Southern California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Yao D.,Peng Z.,Kaneko Y.,et al. Dynamic triggering of earthquakes in the North Island of New Zealand following the 2016 Mw 7.8 Kaikōura earthquake[J],2021,557.
APA	Yao D.,Peng Z.,Kaneko Y.,Fry B.,&Meng X..(2021).Dynamic triggering of earthquakes in the North Island of New Zealand following the 2016 Mw 7.8 Kaikōura earthquake.Earth and Planetary Science Letters,557.
MLA	Yao D.,et al."Dynamic triggering of earthquakes in the North Island of New Zealand following the 2016 Mw 7.8 Kaikōura earthquake".Earth and Planetary Science Letters 557(2021).