Faulting in rocks occurs when accumulated elastic stress is released along weak discontinuities. The event characteristics depend on the loading conditions, the mechanical properties of the rocks, and the geometry of the fault. Quantifying the effect of geometrical irregularities on stress accumulation and material yielding is therefore fundamental for evaluating fault stability at a wide range of scales and in various tectonic and geoengineering settings. For example, laboratory experiments demonstrate that surface roughness amplitude strongly influences slip dynamics during shear (Harbord et al., 2017;Ohnaka, 1973), while numerical simulations predict that geometrical irregularity of large natural faults affects magnitudes, nucleation, and distribution of earthquakes (
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