Dictionary:Noise (seismic)

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Seismic energy other than primary reflections; includes microseisms, source-generated noise, multiples, tape-modulation noise, harmonic distortion, etc. Sometimes divided into coherent noise (including nonreflection coherent events) and random noise (wind noise, instrument noise, and other noncoherent energy). Ambient seismic noise refers to the background of random earth movements. Sometimes restricted to seismic energy not derived from the source.