Figure 3. Interpreted P-SV sequences (bottom) and their equivalent P-P sequences (top). DR = depth-registration feature showing time-warped P-SV geology is at the same image coordinates as P-P geology above 3 s, but ~100 ms later than P-P geology at 5.5 s. Intervals A through E are depth equivalent and show that a P-SV sequence boundary may have no equivalent P-P sequence boundary or a much fainter P-P boundary.