Subsurface cavities location requires geophysical methods in which the measures are affected by density variations between the rock masses. The microgravimetric investigations carried out by Geopartner allow to detect the density of various structural morphologies in the subsoil, both natural and anthropogenic (eg. sinking and after mining cavities formation). The accuracy obtained from our measurement instrumentation allows us to analyze the temporal variations of the gravity and thus the trend and nature of geodynamic processes.