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  闫新义,冯雪玲,刘东亚,谭毅培.2018年11月25日新疆博乐MS4.9地震余震检测与目录完整性研究[J].震灾防御技术,2020,15(3):548-555, DOI:10.11899/zzfy20200308.

2018年11月25日新疆博乐MS4.9地震余震检测与目录完整性研究
摘要:    本文基于匹配滤波技术,通过SEPD(Seismic Events and Phase Detection)对2018年11月25日新疆博乐MS4.9地震序列进行检测,检测出遗漏地震32条,84.4%地震为ML0.0—1.0,9.4%地震小于ML0.0,较地震目录中原有15条地震多213%,检测出的遗漏地震事件使地震目录更加完整。检测后的最小完整性震级由检测前的ML1.6减至ML0.8,地震目录最小完整性震级的减小有利于地震工作者对区域地震活动性作出更准确全面的结论,并使地震危险性分析更可靠。
作者单位
闫新义 新疆维吾尔自治区地震局, 乌鲁木齐 830011 
冯雪玲 新疆维吾尔自治区地震局, 乌鲁木齐 830011 
刘东亚 新疆维吾尔自治区地震局, 乌鲁木齐 830011 
谭毅培 天津市地震局, 天津 300201 
关  键  词:匹配滤波技术  新疆博乐MS 4.9地震  SEPD  遗漏地震  地震目录
DOI:10.11899/zzfy20200308
基金项目:中国地震局“三结合”课题(CEA-JC/3JH-173102、3JH-202001097);新疆地震科学基金(202004)
收稿日期:2020-04-02
作者简介:闫新义,男,生于1991年。工程师。主要从事地震监测研究工作。E-mail:1178648911@qq.com
通讯作者:
Research for Aftershock Detection and Completeness of Earthquake Catalogues of the Bole MS4.9 Earthquake in November 2018
Abstract:      Based on matched filter technique and by SEPD software, aftershock sequence to earthquake of Xinjinag Bole during 25th to 27th in november 2018 was detected, and 32 missing earthquakes were found. The missing earthquakes during ML0.0~1.0 is 84.4%, the earthquakes less than ML0.0 is 9.4%. The amount of detected earthquakes is 213% more than the 14 earthquakes in catalogues, and the eaethquakes catalogue become more complete. The minimum integrity magnitude reduce from ML1.6 to ML0.8 after detection. The reduced of minimum integrity magnitude in the whole earthquakes catalogues is in favor of more accurately and roundly research for activity of area earthquake and more reliable to seismic hazard analysis.
Keywords:  Matched filter technique  MS4.9 earthquake of Xinjiang bole  SEPD  Missing earthquakes  Earthquake catalogues
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