In the last year the reorganization of the Osservatorio Vesuviano seismic monitoring activity has been performed. Moreover, the number of analog short period seismic stations on the seismogenetic areas was increased and the first Digital Telemetered Broad Band stations were installed.
Fine sand is used to improve isolation and coupling.
For Broad Band sensors the thermal insulation is guaranteed by a high density polymeric foam and by 8cm thick polystyrene slices. Each sensor is automatically calibrated once a day. Electronics is set up in waterproof containers, is fully grounded and lightning protected. Batteries are also isolated through insulation transformers and automatic battery chargers.