气候变化领域集成服务门户(CCPortal): Optimization of the Match-Filtering Method for Robust Repeating Earthquake Detection: The Multisegment Cross-Correlation Approach

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DOI	10.1029/2020JB019714
	Optimization of the Match-Filtering Method for Robust Repeating Earthquake Detection: The Multisegment Cross-Correlation Approach
	Gao D.; Kao H.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	Waveform match-filtering (MF), based on cross-correlation between an earthquake pair, is a powerful and widely used tool in seismology. However, its performance can be severely affected by several factors, including the length of the cross-correlation window, the frequency band of the applied digital filter, and the presence of a large-amplitude phase(s). To optimize the performance of MF, we first systematically examine the effects of different operational parameters and determine the generic rules for selecting the window length and the optimal frequency passband. To minimize the influence of a large-amplitude phase(s), we then propose a new approach, namely, MF with multisegment cross-correlation (MFMC). By equally incorporating the contributions from various segments of the waveforms, this new approach is much more sensitive to small separation between two sources compared to the conventional MF method using the entire waveform template. To compare the reliability and effectiveness of both methods in capturing interevent source separation and identifying repeating earthquakes, we systematically conduct experiments with both synthetic data and real observations. The results demonstrate that the conventional MF method can detect the existence of an event but sometimes lacks the resolution to tell whether the template and detected events are co-located or not, whereas MFMC works in all cases. The far-reaching implication from this study is that inferring source separation between an earthquake pair based on the conventional MF method, particularly with data from a single channel/station, may not be reliable. ©2020 Her Majesty the Queen in Right of Canada. Reproduced with the permission of the Minister of Natural Resources.
英文关键词	interevent separation; match-filtering; multisegment cross-correlation; optimal filter; repeating earthquakes; template window length
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/187789
作者单位	School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada; Pacific Geoscience Centre, Geological Survey of Canada, Sydney, BC, Canada
推荐引用方式 GB/T 7714	Gao D.,Kao H.. Optimization of the Match-Filtering Method for Robust Repeating Earthquake Detection: The Multisegment Cross-Correlation Approach[J],2020,125(7).
APA	Gao D.,&Kao H..(2020).Optimization of the Match-Filtering Method for Robust Repeating Earthquake Detection: The Multisegment Cross-Correlation Approach.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Gao D.,et al."Optimization of the Match-Filtering Method for Robust Repeating Earthquake Detection: The Multisegment Cross-Correlation Approach".Journal of Geophysical Research: Solid Earth 125.7(2020).