Field data collected during the H2020 program mission. This project has received funding from the [European Union's Horizon 2020 research and innovation programme][European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme][Euratom research and training programme 2014-2018] under grant agreement No [number] 644015 First of all, we should talk about natural risks and how these phenomena can affect the population and its activity. The concept of risk estimates the probability of damage caused by a natural phenomenon, as the combination of the dangerousness of this natural phenomenon, the vulnerability of the affected elements and the exposure. The risk is expressed by the relation:NATURAL RISK = HAZARD x VULNERABILITY x EXPOSURE