The geological record evidences that cosmic impacts have accompanied the geobiological evolution of our planet. There is a general agreement that the largest risk of impact (and the highest difficulty of observation and monitoring) is focussed on “small objects” with sizes ranging from 10 to 300 m. Computer simulation and modelling offer new insight into the formation of impact craters, not only helping to understand ancient impact events, but also providing a way for analyzing and evaluating management issues related to future crisis scenarios. Very recent events, such as the Chelyabinsk meteor event (Russia, 15 february, 2013) confirm the significance of being aware about these astrogeological hazards, as well as of having appropriate methodological tools and protocols which help us minimize their effects. A set of twenty possible crisis scenarios, related to different types of impactors, have been simulated and evaluated.
- crisis scenario