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