Fig. 7
a Coulomb stress change on surrounding faults caused by the 2017 Mainling earthquake; b, c combined Coulomb stress changes on surrounding faults in different areas caused by the 1947 Lang earthquake, the 1950 Zayu earthquake and the 2017 Mainling earthquake. The dotted line box indicates the extent of Fig. 7a, b. The blue focal spheres represent the focal mechanisms of the historical earthquakes. The black focal spheres near the fault names represent the slip mechanisms of the faults, and the parameters (Additional file 1: Table S1) are selected from Ding et al. (2001) and Yin et al. (2018a)