The following list is continually updated. On a 2-dimensional representation of a sphere, or a map, the shortest path appears curved. The wiggles recorded on the three components represent the ground motion at TUC as the result of the arrivals of different seismic phases. Seismic phases travel at different velocities, which is why they arrive at different times on the seismogram. To identify these phases, seismologists use a travel time curve .
Depth can be a difficult thing to determine.
DIST is distance in degrees along the great circle path.