99 5. Geophysical methods • a correlation term: CCor = 1 – (Cor/Cormax), with Cor being the correlation coefficient between two normalized wavelets. In karstic zones, a high CCor coefficient is observed. Figure 10a shows the 3m constant offset sections recorded in boreholes M11, M14, M20, and M22. On the acoustic sections, refracted P-waves appear in the 0.5–1.2 ms time interval, converted refracted S-waves and pseudo-Rayleigh waves (a) (b) Figure 10 FWAL at boreholes M11, M14, M20, and M22: (a) acoustic sections, (b) P-wave velocity logs.
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