This paper deals with the problem of aligning two seismic traces and, by repeated application, any number of seismic traces. At first appearance this is a trivial problem. One need only compute the cross-correlation of the two traces and, from the peak of this function, the optimum alignment is known.

But this is merely the best whole-trace alignment via static shift. In a complex data set, such as a common midpoint (CMP) gather, the human eye can associate events that a global correlation alignment will not honor. What the eye is able to do is a time-variant, nonlinear association of...

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