1. n. [Geophysics]

A surveying technique used to identify local, high-velocity features such as salt domes, also called fan shooting.

See: salt dome

2. n. [Geophysics]

A borehole seismic method in which a surface source transmits seismic energy from various locations to a receiver in a wellbore to locate high-velocity features such as salt domes.

See: borehole seismic data,  receiver,  salt proximity survey,  source