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S-wave and P-wave vertical seismic profiles were recorded by MicroGeophysics Corporation (MGC) at two locations in Ceresco. Measurements were made at 2.5 ft intervals using a five geophone downhole tool and a sledge hammer seismic source. Initial data processing was done by MGC and followed by extensive processing by ESRI to produce detailed time-depth curves and corridor stack traces.

	Reformat SEG-2 to SEG-Y
	Sort field records / Reverse & sum shear wave records
	Write depth info to headers
	Display / Trace edits / Bandpass filter
	Pick first breaks
	Correct times for source offset (TVT) / Calculate velocity profile
	Time align downward travelling energy / Mean amplitude scaling
	Spatial median filter 9 pt - enhance downgoing wavefield
	Wavefield separation (subtract median filtered data from input)
(Downgoing waves)	<--------------------------------->	(Upgoing waves)
Spiking decon operator found		Spiking deconvolution
Bandpass filter / Scaling		Bandpass filter / Scaling
Display		Display
		Align at two-way reflection time
		Spatial median filter (5 pt)
		Display
		Mute / Front corridor stack
		Bandpass filter / Scaling
		Display