(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