Fig. 3: Transition from fast to slow slip events.
From: Initial effective stress controls the nature of earthquakes
a Mechanical results obtained during the experiment conducted at 95 MPa confining pressure. The evolution of the local shear stress along the fault at each strain gage location as a function of time is displayed by the grey-to-black solid lines. The evolution of the average slip along the fault is displayed by the red solid line and the evolution of the fluid pressure in the injection site by the cyan solid line. b Slip velocity burst associated with each slip instability. The peak slip velocity reached during instability decreases over time, i.e., with an increasing number of events and with the progressive release of the initial shear stress. Numbers displayed in a and b refer to events for which the slip front propagation is presented in Fig. 4. c Scaling relation between the shear stress drop versus average slip rate obtained using the average stress profile recorded by strain gages (grey circles) or pressure sensors (white circles).
