Dictionary:Fig V-10

FIG. V-10. Vertical seismic profile. (a) Each trace is recorded at a depth in a borehole using an air-gun source at the surface. (b) Same except each trace has been shifted by the one-way traveltime to the surface, thus aligning reflections (upcoming events) horizontally. A shift in the other direction would align downgoing events horizontally. (c) Portion of a reflection record section across the well location. (d) Sonic log in the well. (From Sheriff and Geldart, 1995, 490.)