Fig. 3: Unstable sliding in laboratory slow slip.
From: Spontaneous complexity in the dynamics of slow laboratory earthquakes
a Evolution of friction (black, close-up in (b)) and average luminosity (blue) as a function of time for a range of load point velocities (LPV). Note that the average luminosity is anticorrelated with friction (balloon) but appears nearly invariant throughout the stick-slip series when compared to the variations during run-in (Fig. 1b). c Qualitative stressing rate (inverse of luminosity change rate, dL/dt with dt = 20 ms) in the shear direction restricted to the stripe of Fig. 1c, frame VIII. Red circles indicate the approximate time and location of nucleation.
