Figure F4. Comparison of slowness values at Site 1173: hand-picked from dispersion plots (red), laboratory core samples (black), conventional semblance with look-up table dispersion corrections (gray), and a wireline sonic log (blue). Hand-picked values generally agree with the core and wireline logging results. Conventional semblance results underestimate slowness by up to 10%, increasing with depth.

Figure F4. Comparison of slowness values at Site 1173: hand-picked from dispersion plots (red), laboratory core samples (black), conventional semblance with look-up table dispersion corrections (gray), and a wireline sonic log (blue). Hand-picked values generally agree with the core and wireline logging results. Conventional semblance results underestimate slowness by up to 10%, increasing with depth.