Dictionary:Coherence analysis

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Correlating small portions of a trace with respect to surrounding traces. Abrupt changes in the system of correlation, that is, incoherencies, are displayed in a variable-density form to emphasize changes in correlation, perhaps because of faulting, stratigraphic change, etc. Common coherence measures include crosscorrelation, semblance, and eigenvector analysis; see Figure A-24d. Coherence cube is an Amoco tradename.