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air gun

1. n. [Geophysics]

A source of seismic energy used in acquisition of marine seismic data. This gun releases highly compressed air into water. Air guns are also used in water-filled pits on land as an energy source during acquisition of vertical seismic profiles.

See: acquisitionbubble effectcavitationimpulsive seismic datasourcevertical seismic profilewater gun

Diagram of marine seismic acquisition
Diagram of marine seismic acquisition.

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