Four lines of 2D vertical and three-component seismic data were acquired in the Blackfoot area east of Calgary in July, 1995. The data were sorted by the frequencies of the 3C geophones, processed, and stacked. The influence of the frequency is shown by focusing on a target zone. Both vertical and radial component data were processed, but only results for vertical component data are presented because of the low resolution of the radial component data.
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