1. n. [Geophysics]

An appearance of seismic data as a diffraction, reflection, refraction or other similar feature produced by an arrival of seismic energy. An event can be a single wiggle within a trace, or a consistent lining up of several wiggles over several traces. An event in a seismic section can represent a geologic interface, such as a fault, unconformity or change in lithology.

See: abnormal events,  attenuate,  bow tie,  character,  coherence filtering,  dim spot,  interval time,  isochron map,  lag,  long-path multiple,  multiple reflection,  peg-leg multiple,  phantom,  pick,  primary reflection,  processing,  seismic section,  short-path multiple,  sideswipe,  signature,  smile,  space frequency domain,  tuning effect