1976年唐山大地震库仑破裂应力对唐山及邻近地区地震的影响  

The Influence of the Coulomb Failure Stress Following the 1976 Tangshan Earthquakes on Earthquakes in Tangshan and Its Adjacent Area

作　　者：张珊珊 万永革[2,3] 王晓山 崔华伟 王曰风[1] 张秀萍 ZHANG Shanshan;WAN Yongge;WANG Xiaoshan;CUI Huawei;WANG Yuefeng;ZHANG Xiuping(Zhangjiakou Central Seismic Station,Zhangjiakou 075400,China;Institute of Disaster Prevention,Sanhe 065201,China;Hebei Key Laboratory of Earthquake Dynamics,Sanhe 065201,China;Hebei Earthquake Agency,Shijiazhuang 050021,China;Shandong Earthquake Agency,Ji’nan 250000,China)

机构地区：[1]张家口地震监测中心站,河北张家口075000 [2]防灾科技学院,河北三河065201 [3]河北省地震动力学重点实验室,河北三河065201 [4]河北省地震局,石家庄050021 [5]山东省地震局,济南250000

出　　处：《华北地震科学》2022年第1期7-14,共8页North China Earthquake Sciences

基　　金：河北省地震科技星火计划项目(DZ20190415002,DZ20200827053,DZ20200827056);中央高校科研业务费专项(ZY20215117)。

摘　　要：通过计算1976年唐山7.8级地震、滦县7.1级地震、宁河6.9级地震产生的库仑破裂应力,得到这3次地震在唐山地区的库仑破裂应力演变过程;将研究区域(39.0°~40.5°N,117.0°~119.0°E)1979年以来的1.0级及以上地震双差重定位结果同库仑破裂应力分布对比分析,认为历史大震对现今地震的调制作用变弱;通过分析2002—2020年部分中强地震受库仑破裂应力作用情况,认为历史大震可能对蓟运河断裂附近区域触发作用较明显,而对唐山断裂附近区域的触发作用不明显,2020年7月12日古冶5.1级地震、2021年4月16日滦州4.3级地震受到了历史大震的抑制作用。The Coulomb failure stress of the Tangshan M7.8 earthquake,Luanxian M7.1 earthquake and Ninghe M6.9 earthquake in 1976 was calculated and the evolution process of the coulomb failure stress of the three earthquakes in Tangshan area is obtained.Based on the comparison between the coulomb rupture stress distribution and the doubledifference relocation results of earthquakes with magnitude 1.0 and above since 1979 in the study area(39.0°~40.5°N,117.0°~119.0°E),it is concluded that the modulation effect of historical large earthquakes on the current earthquakes is weakened.It is possible that from the year 2002 to the year 2020 the areas nearby the Jiyunhe fault were affected obviously,however the areas nearby the Tangshan fault were affected inconspicuous.The Guye M5.1 earthquake on July 12,2020 and the Luanzhou M4.3 earthquake on April 16,2021 were inhibited by it.

关 键 词：唐山地震 库仑破裂应力 非均匀破裂模型 粘弹性力学模型 余震关系 

分 类 号：P315.33[天文地球—地震学]