Noise in land seismic data?Iga Pawelec and Paul Sava

Center for Wave Phenomena, Colorado School of Mines

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challenging land data

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challenging land data

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unique data features

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Øfine sampling

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10 m

single sensors

geophone group

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unique data features

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Øfine samplingØnear offsets

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What is this pattern?

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chirp signal

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vibroseis engine

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harmonic distortion

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sound wave

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unique data features

Øfine samplingØnear offsetsØcontinuous recording

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ambient recording:1 hour

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ambient recording:1 hour

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?

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ambient recording: 1 minute

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ambient recording: 1 minute

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ambient recording: 5 seconds

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ambient recording: 5 seconds

summary

• land seismic data are severely undersampled• “noise” represents slowly propagating waves• source generated noise is complex and non-stationary• the ambient seismic signal cannot be viewed as white noise

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acknowledgements

• Geophysical Technology Inc.• Dawson Geophysical• CSM Geophysics Field Camp crew

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