Fig. 11

Rayleigh wave phase velocity from synthetic vertical velocity in Fig. 9 for model B. Synthetic waveforms are analyzed in ranges of 5 m from the source: 5–10 m, 8–13 m, 11–16 m, 14–19 m, 17–22 m, 20–25 m. Plotted points represent observed phase velocities for the synthetic waves recorded at each source distance. The solid line represents the theoretical phase velocity of the fundamental mode Rayleigh waves. The two dotted lines indicate the maximum and minimum wavelengths resolved by the linear array, respectively. The frequency bands of capable wavelength are focused