How do Laboratory Friction Parameters Compare With Observed Fault Slip and Geodetically Derived Friction Parameters? Insights From the Longitudinal Valley Fault, Taiwan

Laboratory measurements of constitutive frictional parameters are commonly inferred to explain the wide variety slip behavior seen on natural faults. The extent which these small-scale directly relate fault remains obscure. In this work, we compare laboratory-determined surface-derived samples from along length Longitudinal Valley Fault (LVF) in Taiwan with observed and obtained geodetically. LVF displays partially locked creeping sections a Mw 6.8 event 2003 produced transient acceleration adjacent that can be used determine for direct comparison laboratory-measured ones. We find friction markedly different collected fault, former showing lower coefficients more positive values stability parameter (a−b). Moreover, product (a−b) effective normal stress, determined geodetically, very closely those measured laboratory. Mineralogical microstructural analyses gouges show some mineralogically similar produce distinctly behavior, may related presence distribution kaolinite. conclude overall upscaling laboratory properties appears reflect well large-scale