Fig. 11
From: Weak faults at megathrust plate boundary respond to tidal stress
Numerical simulation results for Ps reflected waves in anisotropic media. a Velocity model (1) with a velocity gradient above the megasplay fault at x2 = 4 km. Star indicates the source location. Solid and dashed lines in right panel represent 1D velocity model at (x1, x2) = (4.0, 4.0) and the original model, respectively. b Velocity model (2) with two layers of velocity reductions and a velocity gradient above the megasplay fault. c Ps amplitudes at OBS02 for (light-blue) model (1), (orange) model (2), and (black) the original model (Fig. 4) at aspect ratio of cracks of 0.2, 0.6, and 1.0. d Ps amplitudes at OBS02 for (red) porosity of 0.05 and (black) porosity of 0.07 (original model; Fig. 10)