一种自动扫描地震漏检事件方法的研究与实现  

The Research and Realization for Scanning Missed Seismic Events Automatically

作　　者：张波[1] 王娟[1,2] 邱宏茂[1] 石建芳[1] 

机构地区：[1]禁核试北京国家数据中心和北京放射性核素实验室,北京100085 [2]中国地震局地球物理研究所,北京100081

出　　处：《地震工程学报》2013年第2期321-325,共5页China Earthquake Engineering Journal

基　　金：国防科技预先研究军控核查技术(513310104)

摘　　要：地震事件的自动处理过程中会发生遗漏。台站数量越多,地震分析员在手动扫描遗漏事件时所花费的时间就越长。本文讨论了一种自动扫描漏检事件的方法,该方法利用分析员的分析经验,结合台站分布状况和地球物理学规则,重新关联那些具有很可能来自特定震源区域而未被分析员关联的信号,以形成一个待验证的事件,供分析员审定。该方法大大减少了分析员的工作量,提高了地震公报的质量。There are more than eight thousands times more than magnitude four in the world ever years.The seismic waves excited by two or more different earthquakes sometimes at the same time reach the observation seismic stations;it is difficult for seismic analysts to manually look for missed seismic events by the automated process software without any tools.The analysts have to spend more time to scan missed event in manual when there are more and more the number of stations in the network.The experience of the analysts determines whether to effectively detect the missed events and experienced analysts can successfully detect missed seismic events by the automated process system in a relatively short period of time.How to reduce the workload of analysts,as well as how to improve the efficiency and accuracy of their work is the issue which we discuss in the paper. The method of scanning the missed seismic events automatically and the software developed base on the method are introduced in the paper.Automatic scanning missed event method can scan the unassociated signal in the automatic process phase and re-associate them to form a new event.It captures the knowledge of experienced analysts and makes that knowledge available to all analyst and uses empirically derived information to identify candidate association sets for a given source region.We divide the world into several geographic focal regions according to the geographical distribution of seismic stations in NDC monitoring system and the earth physics rules.There is a corresponding set of sensitive stations in each certain region.The criteria for the source regions and candidate arrivals are defined in the NDC database tables and user definable options to control processing are stored in a parameter file.Each region is given a name,region identifier（number）,and upper and lower bounds for latitude and longitude.The scanning software computes an initial P travel-time window for each station to the closest and furthest point in the region. To sum up,the scanning so

关 键 词：全面禁止核试验条约(CTBT) 地震信号 自动扫描 漏检事件 

分 类 号：P315.61[天文地球—地震学]