Campi Flegrei is an active volcanic area posing a serious threat over Naples. Half of
the city lies inside the caldera rim. The volcano has shown in the last 30 years different
episodes of unrest, the most recent is still ongoing. For this reason the monitoring of
this volcano is a fundamental task. The current seismic network consists of 8 short
period and 5 broadband stations. The seismic monitoring is complemented by 2 infrasonic
sensors and 3 dilatometers. The recent seismicity has been characterized by
swarms of volcano-tectonic and long-period events. The network geometry allows an
accurate location of VT events with a detection threshold of magnitudes less than 1.0
Some VT events have been recorder also by the infrasonic sensors showing interesting
similarities. LP events have been recorded by both short period and broadband
stations. The polarization analysis performed over the broadband recordings is an important
tool for the real time detection of such events, related to the dynamics of the
hydrothermal system. The ongoing developments consists in a progressive increasing
of the number of broadband digital stations and infrasonic sensors, in improving the
accuracy of hypocenter locations by using a 3D velocity model and in the implementation
of new automatic techniques aimed at the detection, classification and analysis
of seismic events.PublishedVienna, Austria1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attiveope
