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A2Z A collection of traces of pre-stack seismic data, the traces of which share some common geometric attribute. Most commonly refers to a common depth point (CDP), common image point (CIP) or common mid-point (CMP) gather—see below for definitions and examples. Gathers are a way to examine the dependence of amplitude, signal:noise, move-out, frequency content, phase, and other seismic attributes, on offset, incidence angle, azimuth, and other geometric attributes.

Common source or receiver gathers

A basic quality assessment tool in field acquisition. The traces of the gather are from many receivers and one shot (a so-called shot gather, or common source gather), or one single receiver over many shots (a common receiver gather).

Common image point gathers

Common offset gather

Common azimuth gathers

External links