Figure 1: Experimental run plot.
From: Laboratory observations of slow earthquakes and the spectrum of tectonic fault slip modes
Friction data for one experiment (p4342) at a normal stress of 12 MPa and shearing rate of 10 μm s−1. The upper inset shows spontaneous emergence of unstable slow slip. Stick–slip amplitude increases gradually over a few millimetres before reaching steady state. The lower right inset shows details of fault slip events, note the gradual acceleration at the start of each failure event. The lower left inset shows the double direct shear configuration and locations of displacement transducers. Spikes at 13 and 22 mm displacement are due to brief pauses in shearing to reset displacement transducers.
