Abstract

The dispersive characteristics of Rayleigh type surface waves were utilized for imaging the shallow subsurface layers near Jabalpur, India. The reliability of multichannel analysis of surface waves depends on the accurate determination of phase velocities for horizontally traveling fundamental mode Rayleigh waves. Multichannel recording paves the way for effective identification and isolation of various factors of noise. Decomposition of a multichannel record into time-frequency format permits real-time maximization of S/N ratio during acquisition and processing stages. Using