Numerical modeling results for the standard model with the low-velocity material overlying the Pacific slab. (top) Snapshots of seismic wave propagation at 5.0, 12.0, and 19.0 s. (bottom) Simulated vertical component waveforms with a low-pass filter (8 Hz). Waveforms are scaled by the same amplitude. The red dashed line indicates arrival times of guided waves in the subducting crust. Other symbols are the same as those in Figure 5.