Fault plane parameters of Tancheng M81/2 earthquake on the basis of present-day seismological data  

作　　者：Cuiying Zhou Guiling Diao Jie Geng Yonghong Li Ping Xu Xinliang Hu Xiangdong Feng 

机构地区：[1]Earthquake Administration of Shandong Province, Ji'nan 250014, China [2]Earthquake Administration of Hebei Province, Shijiazhuang 050021, China

出　　处：《Earthquake Science》2010年第6期567-576,共10页地震学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.90814002);the Natural Science Foundation of Shandong Province(No.Y2005E02)

摘　　要：The great Tancheng earthquake of M81/2 occurred in 1668 was the largest seismic event ever recorded in history in eastern China. This study determines the fault geometry of this earthquake by inverting seismological data of present-day moderate-small earthquakes in the focal area. We relocated those earthquakes with the double-difference method and found focal mechanism solutions using gird test method. The inversion results are as follows： the strike is 21.6°, the dip angle is 89.5°, the slip angle is 170°, the fault length is about 160 km, the lower-boundary depth is about 32 km and the buried depth of upper boundary is about 4 km. This shows that the seismic fault is a NNE-trending upright right-lateral strike-slip fault and has cut through the crust. Moreover, the surface seismic fault, intensity distribution of the earthquake, earthquake-depth distribution and seismic-wave velocity profile in the focal area all verified our study result.The great Tancheng earthquake of M81/2 occurred in 1668 was the largest seismic event ever recorded in history in eastern China. This study determines the fault geometry of this earthquake by inverting seismological data of present-day moderate-small earthquakes in the focal area. We relocated those earthquakes with the double-difference method and found focal mechanism solutions using gird test method. The inversion results are as follows： the strike is 21.6°, the dip angle is 89.5°, the slip angle is 170°, the fault length is about 160 km, the lower-boundary depth is about 32 km and the buried depth of upper boundary is about 4 km. This shows that the seismic fault is a NNE-trending upright right-lateral strike-slip fault and has cut through the crust. Moreover, the surface seismic fault, intensity distribution of the earthquake, earthquake-depth distribution and seismic-wave velocity profile in the focal area all verified our study result.

关 键 词：Tancheng M81/2 earthquake present-day moderate-small earthquakes double-difference earthquake loca-tion method focal mechanism fault plane parameters 

分 类 号：P315.3[天文地球—地震学]