Fig. 10

Depth dependency of the stress ratio R. a Black dots are the R-value at each node and red crosses are the averaged values at each depth. Horizontal thin lines indicate the estimation error. A curved line is the best fitted line to the red crosses. b The maximum shear stress τ_max = (σ₁−σ₃)/2 as a function of depth. c Histogram of the depth of aftershocks shown in Fig. 3