地震预警中的动态地震定位方法研究及应用  

Research and Application of Dynamic Earthquake Location Method in Earthquake Early Warning

作　　者：王庆民[1] 刘希强[1] 沈得秀 沙成宁[3] 

机构地区：[1]山东省地震局,山东济南250014 [2]山东省地震工程研究院,山东济南250021 [3]青海省地震局,青海西宁810001

出　　处：《地震研究》2013年第4期485-489,554,共5页Journal of Seismological Research

基　　金：国家科技支撑计划(2012BAK19B04);中国地震局地震科技星火计划攻关项目(XH12029)共同资助

摘　　要：使用2009 ～2011年山东地震台网记录到的71次网内地震波形资料,采用2个地震台站的到时差所构造的震中轨迹近似满足双曲线方程,并结合单台测定的方位角及震中距信息,使用Voronoi图对震中位置加以约束的技术思路,实现地震定位精度的逐步提高.与山东地震台网观测报告给出的震中位置进行对比分析,结果表明：单台定位平均误差为18.3 km,双台定位平均误差为16.6 km,三台定位平均误差为10.7 km.Using the epicenter trajectory which is constructed by the arrival time difference of two seismic stations approximately meets hyperbolic equation,combined with the azimuth and epicenter distance determined by the single station,we used technical ideas of the epicenter location restricted by Voronoi diagram so as to realize that the accuracy of earthquake location gradually increase based on the 71 earthquake waveforms recorded by Shandong Seismic Network from 2009 to 2011,.Compared with the location of the epicenter in observation report of Shandong Seismic Network,the results showed that the average error of location respectively determined by a single station,two stations and three stations was 18.3 km,16.6km,and 10.7 km.

关 键 词：VORONOI图 地震定位 双曲线方程 山东地震台网 

分 类 号：P315.7[天文地球—地震学]