Abstract:Based on the focal mechanism solutions of Maduo MS7.4 earthquake given by various institutions after the earthquake, the H-C method is used to quickly judge the seismogenic fault, and quickly identify the seismic rupture direction without reference to aftershocks. The 18 sets of results show the nodal plane I with NWW-trending is the seismogenic fault plane. For validating the results, according to the characteristics of geologic structure in seismic source area, space distribution of aftershock sequence, regional tectonic stress field, isoseismal of seismic intensity, initial findings from field geological survey, we conclude that the Maduo earthquake shows strike-slip mechanism and the nodal plane I with NWW-trending is inferred from the seismogenic fault plane, and the Kunlun-Jiangcuo fault is the seismogenic structure.
YANG Yanming,LIU Xingsheng,REN Jing et al. Quick Fault-Plane Identification by H-C Method: Application to the Maduo, Qinghai MS7.4 Earthquake on 22 May,2021[J]. jgg, 2022, 42(6): 551-558.