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1. n. [Geophysics]

The minimum (negative) deflection of the seismic wavelet. Seismic interpreters commonly pick or track seismic data on paper sections along the trough of a wavelet rather than the solid-colored peak. With the advent of workstations, this is no longer necessary because of automatic picking techniques and the ability to reverse the polarity of the data in real time.

Antonyms: peak

See: amplitudeamplitudepeakpolarity standardwavewavelet