Template matching for simple waveforms with low signal-to-noise ratio and its application to icequake detection

作     者：Haichao Ma Risheng Chu Minhan Sheng Ziye Yu Haichao Ma;Risheng Chu;Minhan Sheng;Ziye Yu

作者机构：State Key Laboratory of Geodesy and Earth’s DynamicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Institute of GeophysicsChina Earthquake AdministrationBeijing 100081China 

出 版 物：《Earthquake Science》 (地震学报（英文版）)

年 卷 期：2020年第33卷第5期

页      面：256-263页

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 070801[理学-固体地球物理学] 0707[理学-海洋科学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 0814[工学-土木工程] 

基　　金：financially supported by the National Key R&D Program of China(No.2018YFC1504200) the LU JIAXI International Team Program from the KC Wong Education Foundation and CAS(No.GJTD-2018-12) National Natural Science Foundation of China(Nos.41661164035 and 41704066) 

主　　题：template matching icequake detection Urumqi Glacier No.1 

摘      要：Template matching is a useful method to detect seismic events through waveform similarity between two *** traditional template matching method works well in detecting small tectonic ***,the method has some difficulty when the signals have relatively low signal-to-noise ratios(SNRs)and simple shapes,e.g.a sinusoidal *** this study,we modify the traditional template matching approach for this *** first construct a virtual three-component seismic station using vertical-component waveforms recorded by three ***,we select a template event from the virtual station,and apply the traditional template *** then verify this method by detecting icequakes with simple waveforms on the Urumqi Glacier No.1 and compare the results with those from the short-term-averages over long-term-average(STA/LTA),the REST method,and traditional template matching *** can be concluded that the modified template matching method using virtual stations has some advantages for seismic data with low SNRs.