1.
n. [Geophysics]
Multiply reflected
seismic energy, or any
event in seismic data that has incurred more than one
reflection in its travel path. Depending on their time delay from the primary events with which they are associated, multiples are characterized as short-path or peg-leg, implying that they interfere with the
primary reflection, or long-path, where they appear as separate events. Multiples from the water bottom (the interface of the base of water and the
rock or
sediment beneath it) and the air-water interface are common in
marine seismic data, and are suppressed by
seismic processing.