气候变化领域集成服务门户(CCPortal): The Spatiotemporal Evolution of Granular Microslip Precursors to Laboratory Earthquakes

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DOI	10.1029/2020GL088404
	The Spatiotemporal Evolution of Granular Microslip Precursors to Laboratory Earthquakes
	Trugman D.T.; McBrearty I.W.; Bolton D.C.; Guyer R.A.; Marone C.; Johnson P.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Laboratory earthquake experiments provide important observational constraints for our understanding of earthquake physics. Here we leverage continuous waveform data from a network of piezoceramic sensors to study the spatial and temporal evolution of microslip activity during a shear experiment with synthetic fault gouge. We combine machine learning techniques with ray theoretical seismology to detect, associate, and locate tens of thousands of microslip events within the gouge layer. Microslip activity is concentrated near the center of the system but is highly variable in space and time. While microslip activity rate increases as failure approaches, the spatiotemporal evolution can differ substantially between stick-slip cycles. These results illustrate that even within a single, well-constrained laboratory experiment, the dynamics of earthquake nucleation can be highly complex. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Learning systems; Piezoelectric ceramics; Slip forming; Stick-slip; Continuous waveforms; Earthquake nucleation; Earthquake physics; Laboratory experiments; Machine learning techniques; Piezoceramic sensors; Spatiotemporal evolution; Theoretical seismologies; Earthquakes; earthquake event; laboratory method; machine learning; nucleation; seismology; shear stress; stick-slip; temporal evolution
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169854
作者单位	Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, United States; Department of Geophysics, Stanford University, Stanford, CA, United States; Department of Geosciences, Pennsylvania State University, University Park, PA, United States; Geophysics Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Department of Physics, University of Nevada, Reno, Reno, NV, United States; Dipartimento Scienze della Terra, Sapienza Universitá di Roma, Rome, Italy
推荐引用方式 GB/T 7714	Trugman D.T.,McBrearty I.W.,Bolton D.C.,et al. The Spatiotemporal Evolution of Granular Microslip Precursors to Laboratory Earthquakes[J],2020,47(16).
APA	Trugman D.T.,McBrearty I.W.,Bolton D.C.,Guyer R.A.,Marone C.,&Johnson P.A..(2020).The Spatiotemporal Evolution of Granular Microslip Precursors to Laboratory Earthquakes.Geophysical Research Letters,47(16).
MLA	Trugman D.T.,et al."The Spatiotemporal Evolution of Granular Microslip Precursors to Laboratory Earthquakes".Geophysical Research Letters 47.16(2020).