In addition to the standard techniques of stacking and digital band-pass filtering for enhancing signal-to-noise (S/N) ratio for common-depth-point (CDP) reflection seismic data, a number of alternative or supplementary methods are available: (1) weighted mixing of adjacent traces, (2) semblance weighting of multichannel data based upon interchannel semblances (Neidell and Taner, 1971), and (3) filtering with the output energy filter (Robinson and Treitel, 1980). Each approach has advantages and disadvantages.

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