Fig. 4From: Effects of frictional properties of quartz and feldspar in the crust on the depth extent of the seismogenic zoneVelocity dependence of steady-state friction (a – b) as determined from Eq. (2) for quartz and feldspar plotted as a function of temperature. a Dry condition, Pc = 150 MPa (Ar gas); b wet condition, Pc = 200 MPa (Ar gas), Pp (pore pressure) = 50 MPa (distilled water)Back to article page