Seismic traces are signals composed of information and noise. In essence, the part of the data set that is noise obscures the information and complicates the processing and interpretation of the seismic traces. Of the two procedures discussed, one is maximum standard deviation for an optimum threshold, and the other is the data transformation by variance. Either or both procedures can be used to enhance signal-to-noise (S/N) ratio. The procedures are data processing steps that are applied to each trace. Examples of successful application of the procedures are presented.

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