Figure F106. Stacked seismic records from zero-offset seismic experiment in Hole C0009A. 10 shot records were stacked for each depth and bandpass filtered at 10–90 Hz. The filter has zero phase response to preserve the correct arrival time of the phase. Gain proportional to the depth from the rig floor is applied to the records to compensate for geometrical spreading of components. See text for description of lines. TD = total depth. A. Vertical z-component. (Continued on next two pages.)
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