气候变化领域集成服务门户(CCPortal): Automatic Detection and Location of Seismic Events From Time-Delay Projection Mapping and Neural Network Classification

CCPortal

DOI	10.1029/2020JB019426
	Automatic Detection and Location of Seismic Events From Time-Delay Projection Mapping and Neural Network Classification
	Mosher S.G.; Audet P.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	The past several decades have seen an exponential increase in the volume of available seismic data, and with it has come the need to develop fast, automatic earthquake detection, and location algorithms. Some of the most recent and promising tools come from the field of machine learning. In this study, we combine a recent seismic detection and location method with neural network classification and analyze 4 months of continuous data recorded by a network of 76 stations in northern California. While these approaches have been used separately, our implementation is unique in that it is not constrained by source templates and avoids user-defined detection thresholds. In particular, we partition our data set into 234,240, 3-min long time windows with 75% overlap. For each time window, we create a 3D image that captures information about the coherence of the seismic wavefield. We then devise four features as input and train a neural network classifier to predict which time windows in the data set are likely to contain regional seismic events. These features include the second and fourth Hu image moments computed from 2D cross sections of our 3D images and statistical p values that quantify the probability of observing network-wide power-spectral density values at 0.2 and 0.5 s. Our neural network model predicts that 2,522 time windows contain seismic events, from which we locate 1,192 unique events. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	machine learning; neural network; seismic detection and location; tremor
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/187572
作者单位	Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, ON, Canada
推荐引用方式 GB/T 7714	Mosher S.G.,Audet P.. Automatic Detection and Location of Seismic Events From Time-Delay Projection Mapping and Neural Network Classification[J],2020,125(10).
APA	Mosher S.G.,&Audet P..(2020).Automatic Detection and Location of Seismic Events From Time-Delay Projection Mapping and Neural Network Classification.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Mosher S.G.,et al."Automatic Detection and Location of Seismic Events From Time-Delay Projection Mapping and Neural Network Classification".Journal of Geophysical Research: Solid Earth 125.10(2020).