利用FOCMEC方法反演2011年江西瑞昌与湖北阳新交界M_S4.6地震的震源机制解  

THE FOCAL MECHANISM OF 2011 M_S4.6 EARTHQUAKE IN THE BORDER REGION OF JIANGXI RUICHANG AND HUBEI YANGXIN INVERSED BY FOCMEC METHOD

作　　者：包秀敏[1] 梁一婧[1] 顾强强[1] 

机构地区：[1]沈阳地震台,辽宁沈阳110161

出　　处：《防灾减灾学报》2012年第3期48-52,共5页Journal of Disaster Prevention And Reduction

摘　　要：利用FOCMEC方法反演了2011年9月10日江西瑞昌与湖北阳新交界MS4.6地震的震源机制解。反演结果为:节面I的走向304°,倾角76°,滑动角4°;节面Ⅱ的走向213°,倾角86°,滑动角165°;P轴的方位角、倾角分别为260°、7°;T轴的方位角、倾角分别为168°、13°;B轴的方位角、倾角分别为19°、75°。其中节面Ⅱ的走向和活动性质与震中附近的郯庐断裂带的分支断裂——池河—西山驿断裂较为接近。分析认为NNE向的池河—西山驿断裂可能是瑞昌—阳新MS4.6地震的发震构造。The focal mechanism of 2011 Ms4.6 earthquake in the border region of Jiangxi Ruichang and Hubei Yangxin has been inversed by using FOCMEC method. The result is as follows： the strike, dip and rake angles of nodal plane I are 304°, 76° and 4°. And those of nodal plane 11 are 213°, 86°and 165°. The azimuth and dip angle are 260°and 7° for P axis , 168° and 13° for T axis , 19° and 75° for B axis. The strike angle and activity characteristic are in accord with the branch fault of Tan-Lu fault zone, Chihe-Xishan Yi fault, which is near the epicenter. So it is analyzed that NNE trend Chihe-Xishan Yi fault may be the causative fault of Ruichang-Yangxin Ms4.6 earthquake.

关 键 词：震源机制解 FOCMEC方法 江西瑞昌与湖北阳新交界M54.6地震 郯庐断裂带 

分 类 号：P315.63[天文地球—地震学]