基于持时组合的地震事件数据序列提取方法  

Study on Extracting Data Sequence of Earthquake Early Warning Observations Based on Combination of Duration Methods

作　　者：宁静 王秀英 赵国存 马志霞 张珊珊[2] NING Jing;WANG Xiuying;ZHAO Guocun;MA Zhixia;ZHANG Shanshan(National Institute of Natural Hazards,Beijing 10085,China;Zhangjiakou Earthquake Monitoring Center Station,Hebei Earthquake Agency,Zhangjiakou 075031,China)

机构地区：[1]应急管理部国家自然灾害防治研究院,北京10085 [2]河北省地震局张家口地震监测中心站,河北张家口075031

出　　处：《华北地震科学》2024年第4期58-65,共8页North China Earthquake Sciences

摘　　要：利用地震触发检测方法及地震工程学中确定地震动持时的方法,构建了一种组合确定持时的方法:首先利用STA/LTA方法确定事件波形的起始位置,然后以括号持时截取和有效持时结合确定事件波形的结束位置。2020年唐山古冶5.1级地震事件记录数据的计算结果表明:此方法可以实现从大量连续的地震波形数据中快速自动截取关键地震事件数据序列,有利于后续对地震波形数据的快速灾害评估计算和处理应用。In this paper,a combined method for determining the duration of ground motion is constructed by using the method of earthquake triggering detection and the method of determining the duration of ground motion in seismic engineering.Firstly,the STA/LTA method is used to determine the starting position of the earthquake event waveform.Subsequently,the end position of the event waveform is determined by the combination of bracket duration and effective duration.The calculation results of the early warning record data of Tangshan Guye MS 5.1 earthquake in 2020 show that the method in this paper can obtain reasonable continuous waveform records of events.With this method,the key seismic event data sequence can be quickly and automatically intercepted from a large number of continuous early warning waveform data,which is conducive to the subsequent application of rapid disaster assessment calculation and processing of earthquake early warning waveform data.

关 键 词：地震动持时 有效持时 极震区 地震预警 唐山古冶地震 

分 类 号：P315.61[天文地球—地震学]