is the merged seismic section (0.1 millisecond delays instead of 5
seconds between the "shots") we recorded. Each red line corresponds to
a fit to the arrival times of a single "shot" at each phone (=station).
Obviously, there are differences in polarities, amplitudes, and
sensitivity (among other things!) in the records due to different
instrument responses on various phones. Calculating the sound velocity in the tables from these lines is straightforward.