Abstract: The note describes seismic refraction tests above a water table at shallow depth. The depth of water table estimated by the refraction test is always greater than the real level of the water. An interpretation based on the ...

Abstract: Hysteretic damping is often modeled by means of linear viscoelastic approaches such as “nearly constant attenuation” models (e.g. NCQ model). These models do not take into account nonlinear effects either on the stiffness ...