【摘要】 1861年普兰店东6级地震是辽东半岛上除1975年海城7.3级地震以外的另一次强度≥6级的地震,经反复考证,该次地震的震中确定在普兰店东姜屯一带。通过对普兰店及附近地区震害资料分析及现代仪器记录地震数据的精定位,研究这一地区发育的区域性金州断裂、普兰店湾断裂和普兰店北西向断裂的活动性及地震危险性,对比分析普兰店附近地区与海城地震区深部构造环境特点,认为与金州断裂具有共轭关系的北西向断裂作为新生性的活动断裂具有更高的地震危险性。北西向断裂是1861年普兰店东6级地震的发震构造,金州断裂作为辽东半岛的主干断裂,充当了控震构造;普兰店湾断裂活动性水平相对较低,地震危险性较弱,与地震的关系不大。更多还原

【Abstract】 The 1861 M6.0 earthquake occurring in the east of Pulandian is the another strong earthquake with M ≥ 6.0 except of the 1975 Haicheng M7.3 earthquake in the Liaodong peninsula.Through repeated investigation,the epicenter of 1861 earthquake is located at Gupao,a village east of Pulandian.Based on the analyses of damage survey,up-to-date seismic data accuracy localization,activity and seismicity of the Jinzhou fault,Pulandian bay fault,Pulandian NW trend fault,along with the comparative analysis of deep seismogenic environment in Pulandian and Haicheng,the NW trend fault conjugated with the Jinzhou fault is determined to be the seismogenic structure of the 1861 M6.0 earthquake,and as the arterial fault in the Liaodong peninsula,the Jinzhou fault controlled the earthquake.The Pulandian bay fault is unattached with the earthquake.更多还原