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