内蒙古及邻区地震台站分布对定位结果的影响  

The influence of distribution of stations in Inner Mongolia and its adjacent areas on the locating result

作　　者：赵艳红 舒雷 苏亚梅 徐锡泉 ZHAO Yanhong;SHU Lei;SU Yamei;XU Xiquan(Earthquake Agency of Inner Mongolia Autonomous Region,Huhhot 010010,China)

机构地区：[1]内蒙古自治区地震局,呼和浩特010010

出　　处：《地震地磁观测与研究》2022年第1期30-36,共7页Seismological and Geomagnetic Observation and Research

基　　金：内蒙古自治区地震局局长基金课题(项目编号:2020TM05)。

摘　　要：选取2013—2019年发生在内蒙古及邻区的50次M_(L)≥3.5地震事件,重新对每个地震分别以选取7—14、4—9个台站组成的子台网进行定位,探讨2种台站分布情况下的定位偏差随空隙角、近台距离、远台距离的变化;水平误差与定位偏差间的关系及水平误差、拟合残差随空隙角的变化;拟合残差随速度模型的变化。结果显示,当选取8个台站且台站分布较合理时,定位结果较好。50 earthquakes with magnitude larger than 3.5 occurred in Inner Mongolia and its adjacent areas from the years of 2013 to 2019 were selected to relocated by a sub-station network composed of 7-14 stations and 4-9 stations,and the changes of locating deviation due to the clearance angle and distances between near or far stations were discussed.Meanwhile,the relationship between horizontal error and locating deviation,the changes of horizontal error and fitting residual with clearance angle,and the changes of fitting residual with velocity model were analyzed.The results show that"positioning sub-network"with 8 stations and relatively reasonable distribution of stations will be helpful for obtaining better locating results.

关 键 词：定位台站 偏差 水平误差 拟合残差 

分 类 号：P315.78[天文地球—地震学]