In the down hole seismic method we record the P and S waves arrivals. The signal is generated on the surface using a sledge hammer and received in the borehole using sensors (multi-directionnal geophones)
The results are used to calculate P and S waves velocities as well as the dynamic parameters:
- Poisson's coefficient
- Compressionnal modulus (Young)
- Shearing modulus
- Incompressibility modulus