CAJ | 학술논문

根据弹性无限半空间位错理论,结合汶川地震和芦山地震的同震破裂模型,以及该地区活动断层几何学和运动学特征,应用 Coulomb 程序,计算了2008年汶川地震静态库仑应力变化,并和余震分布特征进行对比；同时,计算了2008年汶川地震和2013年芦山地震共同作用产生的静态库仑应力变化,并将结果投影到青藏高原东缘主要活动断层上.结果表明：汶川地震产生的余震大部分分布在其造成的静态库仑应力增加区；汶川地震在芦山地震震中区域产生的静态库仑应力显著增加,增加值为0．010~0．050 MPa,汶川地震产生的静态库仑应力变化使得芦山地震提前到来；鲜水河断裂北部、东昆仑断裂、秦岭南缘断裂西段、青川断裂东段、茶坝-林庵寺断裂西段、灌县-江油断裂、大川-双石断裂的静态库仑应力均有不同程度的增加；岷江断裂、虎牙断裂、汶川-茂县断裂、江油-广元断裂、鲜水河断裂南部的静态库仑应力有不同程度的降低；考虑到青藏高原东缘历史大地震和余震分布情况,未来应加强对鲜水河断裂西北段和东昆仑断裂地震危险性的监测与研究.
근거탄성무한반공간위착이론,결합문천지진화호산지진적동진파렬모형,이급해지구활동단층궤하학화운동학특정,응용 Coulomb 정서,계산료2008년문천지진정태고륜응력변화,병화여진분포특정진행대비；동시,계산료2008년문천지진화2013년호산지진공동작용산생적정태고륜응력변화,병장결과투영도청장고원동연주요활동단층상.결과표명：문천지진산생적여진대부분분포재기조성적정태고륜응력증가구；문천지진재호산지진진중구역산생적정태고륜응력현저증가,증가치위0．010~0．050 MPa,문천지진산생적정태고륜응력변화사득호산지진제전도래；선수하단렬북부、동곤륜단렬、진령남연단렬서단、청천단렬동단、다패-림암사단렬서단、관현-강유단렬、대천-쌍석단렬적정태고륜응력균유불동정도적증가；민강단렬、호아단렬、문천-무현단렬、강유-엄원단렬、선수하단렬남부적정태고륜응력유불동정도적강저；고필도청장고원동연역사대지진화여진분포정황,미래응가강대선수하단렬서북단화동곤륜단렬지진위험성적감측여연구.
According to the dislocation theory in elastic infinite half-space and the geometric and kinematic characteristics of active faults,based on the coseismic rupture models of Wenchuan and Lushan earthquakes,changes of static Coulomb stress induced by Wenchuan earthquake in 2008 were calculated by Coulomb software,and were compared with the distribution of aftershocks;changes of static Coulomb stress jointly induced by Wenchuan earthquake in 2008 and Lushan earthquake in 2013 were calculated,and were projected onto main active tectonics in the eastern edge of Qinghai-Tibet Plateau.The results show that most of aftershocks occur in the increase area of static Coulomb stress induced by Wenchuan earthquake;static Coulomb stresses induced by Wenchuan earthquake increase 0.010-0.050 MPa significantly in the epicenter area of Lushan earthquake,and change of static Coulomb stress induced by Wenchuan earthquake leads to the earlier occurrence of Lushan earthquake;static Coulomb stresses of the northern part of Xianshuihe,East Kunlun,the western segment of Qinling southern frontal,the eastern part of Qingchuan,the western part of Chaba-Lin??ansi,Guanxian-Jianyou and Dachuan-Shuangshi faults increase at different levels;static Coulomb stresses of Minjiang,Huya,Wenchuan-Maoxian,Jiangyou-Guangyuan and the southern part of Xianshuihe faults decrease at different levels;considering the distribution of historical great earthquakes and their aftershocks in the eastern edge of Qinghai-Tibet Plateau,monitor and research on the seismic risk in the northwestern part of Xianshuihe fault and East Kunlun fault should be strengthened in future.