气候变化领域集成服务门户(CCPortal): Unsupervised Learning of Seismic Wavefield Features: Clustering Continuous Array Seismic Data During the 2009 L'Aquila Earthquake

CCPortal

DOI	10.1029/2020JB020506
	Unsupervised Learning of Seismic Wavefield Features: Clustering Continuous Array Seismic Data During the 2009 L'Aquila Earthquake
	Shi P.; Seydoux L.; Poli P.
发表日期	2021
ISSN	21699313
卷号	126 期号:1
英文摘要	We apply unsupervised machine learning to 3 years of continuous seismic data to unravel the evolution of seismic wavefield properties in the period of the 2009 L'Aquila earthquake. To obtain sensible representations of the wavefield properties variations, we extract wavefield features (i.e., entropy, coherency, eigenvalue variance, and first eigenvalue) from the covariance matrix analysis of the continuous wavefield data. The defined wavefield features are insensitive to site-dependent local noise, and inform the spatiotemporal properties of seismic waves generated by sources inside the array. We perform a sensitivity analysis of these wavefield features, and track the evolution of source properties from the unsupervised learning of the uncorrelated features. By clustering the wavefield features, our unsupervised analysis avoids explicit physical modeling (e.g., no requirement for event location and magnitude estimation) and can naturally separate peculiar patterns solely from continuous seismic data. Our model-free unsupervised learning of wavefield features reveals distinct clusters well correlated with different periods of the seismic cycle, which are consistent with previous model-dependent studies. © 2020. American Geophysical Union. All Rights Reserved.
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/187408
作者单位	Institut de Sciences de la Terre, Université Grenoble Alpes, CNRS (UMR5275), Grenoble, France
推荐引用方式 GB/T 7714	Shi P.,Seydoux L.,Poli P.. Unsupervised Learning of Seismic Wavefield Features: Clustering Continuous Array Seismic Data During the 2009 L'Aquila Earthquake[J],2021,126(1).
APA	Shi P.,Seydoux L.,&Poli P..(2021).Unsupervised Learning of Seismic Wavefield Features: Clustering Continuous Array Seismic Data During the 2009 L'Aquila Earthquake.Journal of Geophysical Research: Solid Earth,126(1).
MLA	Shi P.,et al."Unsupervised Learning of Seismic Wavefield Features: Clustering Continuous Array Seismic Data During the 2009 L'Aquila Earthquake".Journal of Geophysical Research: Solid Earth 126.1(2021).