Abstract：Using the Snoke approach, we solve the focal mechanism of the July 2, 2018 Fuliang ML4.1 earthquake in Jiangxi province. The results show the best focal mechanism is: nodal plane I, strike is 140°, dip angle is 87°, slip angle is 4°; nodal plane Ⅱ, strike is 50°, dip angle is 86°, slip angle is 177°. The P axis azimuth is 275°, and it is strike-slip fracture mode. The results of nodal plane Ⅱ are in good agreement with those calculated by CAP method, and the P axis azimuth is consistent with the regional stress field. Outcrop geological profile features show that the NE-trending Yifeng-Jingdezhen fault is an early-middle Pleistocene fault with moderate and strong earthquake generating ability. The attitude of the fault is consistent with the strike and dip angle of nodal plane Ⅱ. We conclude that the Yifeng-Jingdezhen fault is the seismogenic structure of the earthquake.
ZENG Xinfu,TANG Lanrong,ZENG Xianjin et al. Focal Mechanism and Seismogenic Structure of the 2018 Fuliang ML4.1 Earthquake in Jiangxi Province[J]. jgg, 2023, 43(9): 919-923.
