# Translations:Instantaneous attributes/1/en

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Aside from the AVO attributes, the instantaneous attributes can be helpful in inferring reservoir parameters. When considered as an analytic signal (in the mathematical sense), a seismic trace can be expressed as a complex function ^{[1]}. An analytic signal is expressed by a time-dependent complex variable *u*(*t*)

- ↑ Taner, 1978, Taner, M. T., 1978, Complex seismic trace analysis: Geophysics, 44, 1041–1063.