1. n. [Geophysics]

An event or appearance of seismic data as a reflection, refraction, diffraction, or other similar feature, or the time at which seismic data appear. An event in a seismic section can represent a geologic interface.

Synonyms: event

See: arrival time,  diffraction,  dip moveout,  first break,  Fresnel zone,  hodogram,  lag,  moveout,  ray tracing,  reflection,  refraction,  seismic section,  spectrum,  time slice