I made traveltime picks along the base of the P formation where earlier discussion suggested that the steam changes would be the largest. The traveltime picks are overlain on each inline section in Figures 21 to 26. On the east side of the well the picks are a little difficult to make because of the polarity reversal along the base of the reservoir reflection. To better visualize which event to pick, I made an animated series of frames showing the sections in chronological order. That greatly aided the interpretation of which reflector was moving where.