GNGTS 2022 - Atti del 40° Convegno Nazionale

396 GNGTS 2022 Sessione 3.1 The Cavone oil field production water re-injection activity was speculated of possibly influencing the 2012ML 5.8Mirandola earthquake source. According to the Italian government guidelines, amonitoring center should analyze geophysical measurements related to seismicity, crustal deformation and pore pressure in quasi real-time. In case of significant earthquakes (i.e. events with magnitude and location included in critical ranges and observation domains, Fig.1) a traffic light system would be used to regulate exploitation and underground operations. For a 2-year-long period of guidelines experimentation, we analyzed the different kinds of available data, and then we tested the existence of possible relations among their temporal trends. We could profit by the presence of the Italian seismic network (IV, Fig.1) in the area, therefore by integrating these data with those of the local seismic network (VO, Fig.1). Despite the short time window and the scarce quantity of data collected, we were able to perform all the required analyses and extract as much meaningful and statistically reliable information from the data. Here we discuss the most important observations drawn from the monitoring results, and highlight the lessons learned by describing practical issues and limitations that we have encountered in carrying out the tasks as defined in the guidelines. Our main goal is to contribute to the discussion about how to better monitor the geophysical impact of this kind of anthropogenic activity. The lack of an assessment of background seismicity in an unperturbed situation -due to long time extraction activities- makes it difficult to get a proper picture of natural background seismic activity, which would be instead an essential reference information for tectonically- active regions, such as Northern Italy. Nevertheless we could demonstrate the importance not only of a wider and more dense seismic network, but more than that of the borehole sensor deployment, in order to improve the microseismic detection capabilities in such a noisy environment as the Po plain.