Shallow shear-wave surveying on water

For the characterization of soils, the shear-wave modulus is often more important than the bulk modulus. In a marine setting shear-wave information is important for, e.g., building offshore, or for finding sand for building. Acquiring seismic data for retrieving the shear-wave moduli of the subsurface is quite cumbersome in a marine environment, and therefore new acquisition and processing methods are being developed. Recently it has become clear that the so-called P*S wave is a type of wave that can be generated in the water and converts to a conventional shear wave at the sea floor. This requires adapted acquisition and processing strategies to obtain shear-wave images of the shallow subsurface.