地震震中实时动态定位的方法研究  

Research on Real-time Evolutionary Earthquake Epicentral Location

作　　者：刘希强[1] 孙亚强[1] 赵冰[1] 王庆民[1] 赵大鹏[1] 赵瑞[1] 李铂[1] 

机构地区：[1]山东省地震局,山东济南250014

出　　处：《西北地震学报》2012年第4期342-349,共8页Northwestern Seismological Journal

基　　金：国家科技支撑计划课题(2012BAK19B04);地震科技星火计划项目(XH12029)

摘　　要：在地震早期预警系统中具破坏性地震震中的确定速度十分重要。本文提出了地震发生后根据1个、2个、3个台站P波到时记录进行动态、近实时确定地震发生区域、线区间和震中位置的方法。方法充分考虑了地震触发台站和非触发台站分布与地震波传播规律的一致性和差异性特征,提高了震中定位结果的精度。对由79个台站组成的山东虚拟测震台网2009-2010年期间记录的425次网内地震进行了快速定位,结果表明对发生在网内的地震可在要求时间内给出比较准确的震中位置,可满足预警地震速报时效性和精度的双重要求。In a earthquake early warning system,the ability to quickly locate devastating earthquake is very important.In this paper a new method to estimate earthquake epicentral region,hyperbolic curve range and epicenter point from only the three earliest P-wave arrival times in a seismic network is developed.In the method the constraint conditions that some stations record P arrivals the others do not record P arrivals,and seismic wave travelling characteristics are considered fully to improve earthquake epicentral location accuracy.The method is applied to P-wave seismic data from the Virtual Seismic Network of Shandong province with 79 stations for 425 earthquakes in 2009-2010,the results show agreement with actual earthquake epicentral locations.The method can satisfy the real-time and accurate need in the earthquake early warning system.

关 键 词：Voronoi剖分 双台子台阵 地震动态实时定位 山东数字测震台网 地震预警 

分 类 号：P315.61[天文地球—地震学]