基于喜马拉雅台阵的内蒙古地震监测能力薄弱区拾震能力分析  

Analysis of seismic pickup capability in weak monitoring area of Inner Mongolia based on the Himalayan array

作　　者：翟浩 刘芳[1] 贾昕晔 郭伟 赵艳红 苏日亚 徐岩[1] 娜热 刘永梅[1] ZHAI Hao;LIU Fang;JIA Xinye;GUO Wei;ZHAO Yanhong;SU Riya;XU Yan;Nare;LIU Yongmei(Earthquake Agency of Inner Mongolia Autonomous Region,Huhhot 010010,China)

机构地区：[1]内蒙古自治区地震局,中国呼和浩特010010

出　　处：《地震地磁观测与研究》2020年第4期90-99,共10页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局地震科技星火计划(项目编号:XH18012);内蒙古自治区地震局局长基金课题重点项目(项目编号:2020TM05)。

摘　　要：基于中国地震科学台阵资料及内蒙古、甘肃地震台网资料,采用结合台阵策略的震相拾取深度学习方法APP,开展内蒙古地震监测能力薄弱区——阿拉善右旗拾震能力研究。研究结果显示,APP方法检测到了人工目录中97.8%的地震,地震拾取总数为人工目录地震数的22倍。经tomoDD方法定位后,地震深度分布较符合内蒙古西部的地质构造特征。对震源深度与断裂位置间相关性的初步分析显示,深度随纬度变化中有5条深度“集中条带”与研究区7条断裂的位置相对应,深度随经度变化中有4条深度“集中条带”与研究区7条断裂的位置相对应。分析认为,APP拾取方法在实际地震资料应用中展示出较强的泛化能力,可为增强固定地震台网对于监测能力薄弱地区微震的识别能力,以及优化地震台网布局、提高监测能力薄弱地区的地震监测水平等提供参考。Based on the data of the Himalayan array and seismic networks in Inner Mongolia and Gansu Province,this paper studies the seismic pickup capability in Alxa right banner,which is a weak earthquake monitoring area of Inner Mongolia,using a deep learning method based APP combined with the array strategy of seismic phase picking.The results show that the APP method detects 97.8%of the earthquakes in the artificial catalog,and gives a total number of earthquakes that is 22 times that of the artificial catalog.Earthquakes are relocated using tomoDD and the distribution of relocated earthquake depth is more consistent with the characteristics of geological structure in the west of Inner Mongolia.Preliminary analysis of the correlation between focal depth and fault location shows that there are five depth concentrated belts in the variation of depth with latitude correspond to the positions of seven faults in the study area,and four depth concentrated belts in the variation of depth with longitude correspond to the positions of seven faults in the study area.The analysis shows that the APP pickup method shows a strong generalization ability in the application of the actual seismic data,and provides references for enhancing the ability of fixed networks to identify microseisms in weak earthquake monitoring areas,optimizing the configuration of seismic networks,and improving the seismic monitoring level in the areas with weak monitoring ability.

关 键 词：喜马拉雅台阵 阿拉善右旗 深度学习 台阵策略 拾震能力 

分 类 号：P315.7[天文地球—地震学]