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Shear wave inversion using the horizontal to vertical ratio of Scholte wave particle velocity

Estimation of shear wave properties is very important in characterizing ocean bottom sediments in the context of underwater acoustic propagation, seabed slope stability, and strength and rigidity of seabed sediments for foundation design. The shear speed in the sediments can be estimated by measuring the interface waves such as Rayleigh, or Scholte waves. Interface wave properties such as frequency dependent phase and group speeds and ratio of the horizontal to vertical particle displacements are strongly dependent on the shear wave speed as a function of depth below the water-sediment interface. Data from a single 3-axis geophone were used in this study to invert for the shear speeds using the particle velocity ratio in various layers of sediment below the sensor location. Data used in this study were collected as part of an acoustic monitoring program near the Block Island Wind Farm off the coast of Rhode Island.