青海玛多7.4级地震静态库仑应力分析  

The Analysis of Static Coulomb Stress of the Qinghai Maduo M_(s) 7.4 Earthquake

作　　者：杨光远 李一帆 王斌[1] 屈淼 罗松 YANG Guangyuan;LI Yifan;WANG Bin;QU Miao;LUO Song(Sichuan Earthquake Agency Panzhihua Earthquake Monitoring Center Station,Sichuan Panzhihua 617000,China;Sichuan Earthquake Agency,Sichuan Chengdu 610041,China)

机构地区：[1]四川省地震局攀枝花地震监测中心站,四川攀枝花617000 [2]四川省地震局,四川成都610041

出　　处：《四川地震》2021年第3期1-4,33,共5页Earthquake Research in Sichuan

摘　　要：2021年5月22日,青海省果洛州玛多县发生74级地震,此次地震发生在川青交界,发震断层位于甘德—南缘断裂附近,四川多地震感强烈。本研究基于弹性理论,利用Coulomb3.3软件计算地震破裂面上产生的静态库仑应力变化,分析此次地震对周围的同震库仑应力影响。结果显示:青海玛多7.4级地震静态库仑应力对周围大部分断层的影响已经超过阈值。On May 22,2021,a magnitude 7.4 earthquake occurred in Maduo County,Guoluo Prefecture,Qinghai Province.The earthquake occurred at the border between Sichuan and Qinghai Province and was strongly felt at multiple sites in Sichuan Province.The seismogenic fault was located close to the Gande-Nanyuan fault.Based on the elastic theory,we used the Coulomb3.3 software to calculate the static Coulomb stress on the rupture plane of the earthquake,and analyzed the influence of the earthquake on the surrounding coseismic Coulomb stress.The results show that the effect of static Coulomb stress on the most of the surrounding faults was greater than the threshold value.

关 键 词：玛多7.4级地震 静态库仑应力 断裂带 

分 类 号：P315.7[天文地球—地震学]