1st Croatian Conference on Earthquake Engineering 1CroCEE 2021

OGS (National Institute of Oceanography and Applied Geophysics) manages a dense earthquake monitoring network in northeastern Italy created after the 1976 Friuli earthquake that caused nearly 1000 victims. Nowadays, the network (called SMINO - Sistema di Monitoraggio terrestre dell’Italia Nord Orientale) is constituted by 43 broad-band, short and mean period seismic stations, 83 strong motion stations, and 19 GNSS stations operating in real-time. SMINO also includes the infrastructure that allows data collection and archiving, and the automated issue of alerts, earthquake location solutions, magnitude estimations and ground shaking maps. Such products are shared with the regional Civil Protection groups that manage the emergency operation in northeastern italy. During the project Edifici Sentinella (funded by the Friuli Venezia Giulia region) and the Italy-Austria Interreg project ARMONIA (Real-time acceleration network for monitoring sites and buildings in Italy and Austria), 54 additional low-cost accelerometric sensors were deployed on selected target buildings previously characterised through ambient vibration analysis. The sensors have been installed at the bottom and/or the top of the structures, allowing for refined local ground motion estimates and for real-time damage monitoring. Such strategy is further used to complement and validate the results of a rapid impact assessment system that OGS is currently developing at municipality and regional scale. A decentralized on-site earthquake early-warning system has been further developed and is presently being tested in an industrial facility located in the area that suffered the consequences of the 1976 Friuli historical earthquake. An overview of the different ongoing OGS activities will be presented and discussed, with particular emphasis on the contribution, at different spatial and temporal scales, to the development of effective disaster risk reduction strategies in northeastern Italy, in collaboration with the Regional Civil Protection and through trans-boundary cooperation.