Extended Data Fig. 8: Distributions of initial stress, rupture initiation site, stress drop and fault gouge during or after the two target experiments.
From: Fault strength and rupture process controlled by fault surface topography
a, Spatiotemporal distributions of τ0, |σ0|, τ0/|σ0| (evaluated at the late inter-seismic stage right before each rupture), and rupture initiation site for selected events on each fault. Note, the results near the western and eastern edges may not be meaningful, since the SGs there could be outside the contacting surface (Extended Data Fig. 1b). For the less (more) heterogeneous fault, 58 (212) events were used for examining the initial stress state, among which 30 (89) were selected for further analysis. For clarity, stress state evaluated at Tp was displayed for the more heterogeneous fault. Nevertheless, an alternative use of stress state evaluated at Tm could yield a very similar pattern, and hence would not change the fundamental contrast against the less heterogeneous fault. b, Distribution of stress drop Δτ on each fault. The results for LB12-012 were derived from the mainshock stage. c, Distribution of fault gouge after each target experiment. The scale for Y has been exaggerated by a factor of 4. The weight of the collected gouge was 0.014 g after LB12-006, and 0.154 g after LB12-012.
