Seismic Downhole & Crosshole Surveys

In order to develop detailed layer velocity information so that engineering parameters such as shear modulus and Poisson's ratio may be calculated, down hole or cross hole surveys may be performed.

These surveys employ the use of down hole geophones and either down hole or surface hammers, depending on the application. Energy generated at the source propagates to the geophone in the form of compression or shear waves which are recorded and stored on a seismograph on the surface.