内蒙古测震台网台站布局对地震定位的影响  

Influence of station layout on earthquake location of Inner Mongolia Seismic Network

作　　者：赵艳红 张帆[1] 苏亚梅 

机构地区：[1]内蒙古自治区地震局,中国呼和浩特010051

出　　处：《地震地磁观测与研究》2018年第4期88-95,共8页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局监测;预测;研三结合课题(项目编号:CEA-JC/3JH-160505);内蒙古自治区科技重大专项<重点地区地震预测预警技术研究开发与推广示范>

摘　　要：选取2009年1月至2016年5月内蒙古中西部及邻区55次M≥3.0地震,通过调整台站空隙角、近台距离、远台距离、定位台站数,改变并对比定位子台网布局对地震定位精度的影响,进而研究定位子台网的选取规则。分区域探讨2种台站分布模式下地震的定位偏差、水平误差、拟合残差随空隙角、近台距离、远台距离、台站分布均匀度的变化及水平误差和定位偏差与拟合残差的关系。分析发现,地震速报选取9—12个台站,且台站分布相对合理的定位子台网参与定位,结果较好,使用水平误差评估定位效果更准确。Selecting 55 earthquakes occurred in different areas Inner Mongolia Autoromus Region and adjacent regions, rules of subarray selection are studied basedon analyzing the influence of station distributions on the accuracy of locating result. The locating deviation, horizontal error, fitting residual with clearance angle, variation with near station and far station, and relation of locating deviation with horizontal error and fitting residual were discussed separately. The results show that it is suitable to select 9 to 12 stations for earthquake locating in rapid report. It is relatively suitable to evaluate the quality of the locating result with horizontal error.

关 键 词：定位子台网 台站分布 定位偏差 水平误差 拟合残差 

分 类 号：P315.78[天文地球—地震学]