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The definition of the network resolution power is an important parameter tobe considered when evaluating most of the seismic analysis, being connectedto the location quality and earthquakes detectability.  We estimated the resolving power of the seismic network of Campi Flegrei. Theresults show that the actual moment magnitude threshold is 0.5 in theSolfatara area, center of the caldera, but increases sharply going away fromthe center.  We also estimated the theoretical resolution power of the actual seismicnetwork of Campi Flegrei plus 5 hypothetical borehole stations, moving theborehole stations into 3 different wells. As expected, big improvements inthe location parameters come from the use of borehole stations. The resultsshow that a 3000 m deep borehole located close to the actual hypocentralarea would allow to detect and locate the very low magnitude earthquakes,probably connected to the hydrothermal system characterizing the CampiFlegrei caldera.  Finally, we performed an optimization analysis of the permanent seismicnetwork of Campi Flegrei finding the best 3 station positions that wouldincrease the resolution power of the network to locate earthquakes in theSouth and offshore part of the caldera. We evidenced that the actual networkhas an improvable resolution in the South and West part of the caldera

Testing and optimization of the seismic networks of Campi Flegrei (Southern Italy)