Figure 4. The
same images as in Figure 3 with depth-equivalent horizons defined. A P-SV
horizon equivalent to AUV horizon A is not labeled because it is quite faint in
this P-SV display format. Interval values of VP/VS velocity ratio between the P-SV
horizons are labeled on the right margins. P-P and P-SV image times are labeled
on opposing sides of the images.