1. n. [Geophysics]

The geometrical pattern of groups of geophones relative to the seismic source. The output from a single shot is recorded simultaneously by the spread during seismic acquisition. Common spread geometries include in-line offset, L-spread, split-spread and T-spread.

See related terms: acquisition,  aperture,  array,  extended spread,  geophone,  group,  in-line,  offset,  perpendicular offset,  shotpoint