The geophysics has a very wide range of survey techniques and analysis. We produce instruments for the vibrational recording and therefore we are focused on the soil mechanical stresses.
The HVSR, or Nakamura method, allows to highlight the possible resonance frequency of a soil. This value is calculated by making the ratio between the average of the horizontal spectra on the vertical spectrum (H / V) of the natural vibrational signal.
Reflection seismic is a method of geophysical analysis of the subsoil that allows to detect with high precision the characteristics and the geometry of the rock formations underlying the earth's surface.