气候变化领域集成服务门户(CCPortal): Continuous chatter of the Cascadia subduction zone revealed by machine learning

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DOI	10.1038/s41561-018-0274-6
	Continuous chatter of the Cascadia subduction zone revealed by machine learning
	Rouet-Leduc B.; Hulbert C.; Johnson P.A.
发表日期	2019
ISSN	17520894
卷号	12 期号:1
英文摘要	Tectonic faults slip in various manners, which range from ordinary earthquakes to slow slip events to aseismic fault creep. Slow slip and associated tremor are common to many subduction zones, and occur down-dip from the neighbouring locked zone where megaquakes take place. In the clearest cases, such as Cascadia, identified tremor occurs in discrete bursts, primarily during the slow slip event. Here we show that the Cascadia subduction zone is apparently continuously broadcasting a low-amplitude, tremor-like signal that precisely informs of the fault displacement rate throughout the slow slip cycle. Using a method based on machine learning previously developed in the laboratory, we analysed large amounts of raw seismic data from Vancouver Island to separate this signal from the background seismic noise. We posit that this provides indirect real-time access to fault physics on the down-dip portion of the megathrust, and thus may prove useful in determining if and how a slow slip may couple to or evolve into a major earthquake. © 2018, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124738
作者单位	Los Alamos National Laboratory, Geophysics Group, Los Alamos, NM, United States
推荐引用方式 GB/T 7714	Rouet-Leduc B.,Hulbert C.,Johnson P.A.. Continuous chatter of the Cascadia subduction zone revealed by machine learning[J],2019,12(1).
APA	Rouet-Leduc B.,Hulbert C.,&Johnson P.A..(2019).Continuous chatter of the Cascadia subduction zone revealed by machine learning.Nature Geoscience,12(1).
MLA	Rouet-Leduc B.,et al."Continuous chatter of the Cascadia subduction zone revealed by machine learning".Nature Geoscience 12.1(2019).