Snapshots of simulated wave propagation in the LA area for the hypothetical SAF earthquake; the snapshots depict velocities along 118\032 from 20 s to 100 s after the origin time of the rupture. Red depicts large amplitudes of both positive and negative polarity. R depicts an area of local resonance above the deepest part of the San Fernando basin. The particle motion is scaled by a constant for all snapshots. Lines labelled as in Fig. 1.