1. n. [Geophysics]

The distance-time relationship determined from analysis of normal moveout (NMO) measurements from common depth point gathers of seismic data. The stacking velocity is used to correct the arrival times of events in the traces for their varying offsets prior to summing, or stacking, the traces to improve the signal-to-noise ratio of the data.

See: common depth point,  gather,  normal moveout,  root-mean-square velocity,  signal-to-noise ratio,  stack,  velocity,  velocity analysis