Abstract In order to investigate whether there is triggering relationship between the 2017-08-09 Jinghe MS6.6 earthquake and the 2018-10-16 Jinghe MS5.4 earthquake in Jinghe County, based on the Jinghe MS6.6 earthquake co-seismic fracture dislocation model and regional crustal velocity structure, we use a viscoelastic model to calculate the surface displacements, co-seismic and post-seismic stress field disturbance of the 2017 Jinghe MS6.6 earthquake. We analyze the stress triggering relationship between the MS6.6 and the MS5.4 earthquake. The results show that the co-seismic displacements caused by the Jinghe MS6.6 earthquake are mainly surface vertical displacements, with a maximum of 84 mm. The horizontal maximum displacement is 25 mm. The earthquake causes the increase of Coulomb stress in the seismogenic fault and its intersection with Bolokenu-Aqikekuduke fault, the eastern segment and branch of Koxemqed fault, and the eastern segment of Kashgar river fault. The Coulomb stress in these areas near the epicenter of Jinghe MS6.6 earthquake increases by more than 10 kPa, but the disturbance is basic elastic stress response in 5~10 a scale, without significant changes with time. The variation of co-seismic Coulomb stress in the epicenter of Jinghe MS5.4 earthquake caused by the Jinghe MS6.6 earthquake is significantly lower than the trigger threshold of 10 kPa. The analysis shows that there is no co-seismic or post-seismic stress trigger relationship between the two earthquakes.
LI Huiling,CAO Jianling,WEI Wenxin. Analysis of the Stress Effect of 2017 Jinghe MS6.6 Earthquake on the 2018 Jinghe MS5.4 Earthquake[J]. jgg, 2021, 41(12): 1253-1257.
LI Huiling,CAO Jianling,WEI Wenxin. Analysis of the Stress Effect of 2017 Jinghe MS6.6 Earthquake on the 2018 Jinghe MS5.4 Earthquake[J]. jgg, 2021, 41(12): 1253-1257.
