Abstract In this study, the aftershocks of Gaoling ML4.8 earthquake occurred on November 5, 2009, in Shaanxi province are relocated by the HypoDD, and the focal mechanism solution of the main shock is determined by the CAP method. Based on the results, we analyze the characteristics of seismogenic structures. The results show that the depth of main shock is about 6 km, and the aftershocks are mainly distributed in the depth range of 2~12 km. Seismic sequences are distributed in clusters on the plane and almost vertical on the depth profile. The focal mechanism solution of the main shock are strike 103°, dip 61° and rake -74°, and strike 252.40°, dip 32.78° and rake -116.44°, respectively. The centroid depth is about 7 km, the moment magnitude is about 4.2, and the P-axis direction is northeast. The focal mechanism results show that the main shock is a normal type earthquake with slightly strike-slip movement. According to the results of relocation and focal mechanism solution, it is suggested that the intersection of Weihe fault and Weinan-Jingyang fault is an important potential seismic area.
LU Zhen,GUO Zhi,HUANG Weiliang et al. Analysis on the Source Parameters and Seismogenic Structures of 2009 Shaanxi Gaoling ML4.8 Earthquake[J]. jgg, 2021, 41(11): 1157-1162.
LU Zhen,GUO Zhi,HUANG Weiliang et al. Analysis on the Source Parameters and Seismogenic Structures of 2009 Shaanxi Gaoling ML4.8 Earthquake[J]. jgg, 2021, 41(11): 1157-1162.
