Extended Data Fig. 1: Experimental setup and sensor configurations.
From: Fault strength and rupture process controlled by fault surface topography
a, Three load cells at the top of the upper rock block measure the total normal force Fn, while one load cell at the western edge of the upper rock block measures the total shear force Fs. During the experiments, normal load was first applied, then the shaking table was instructed to drag the lower rock block toward west, whereas their motion was resisted by the interfacial friction against the upper rock block. b, Configurations of strain gauge (SG) array and piezoelectric (PZT) acoustic sensor array installed at the side surface(s) of the lower rock block. Figure adapted with permission from ref. 36 under a Creative Commons license CC BY-NC 4.0.
