CONTINUOUS SEISMIC MONITORING

In order to observe the evolution of geophysical phenomena such as landslides, slope instability, volcanic activity or induced micro-seismicity over time, continuous seismic monitoring can be performed. The acquisition system records 24 hours a day the seismic signal coming from a geophone or other seismic sensors, generally installed on the surface or in the hole, connected to a control unit equipped with a GPS clock for time synchronization between several units. The recorded events, often of low energy and generated by microfractures in the ground, are distinguished from environmental seismic noise through specific algorithms. Once identified, it is possible to analyze their characteristics (amplitude, frequency, duration), locate their source and track their evolution over time. Thanks to this technique, it is possible to identify any anomalies in microseismic activity, interpreted as precursor signals of more relevant phenomena. The installation of multiple autonomous stations allows the coverage of large areas, even in complex environmental conditions, and the remote control of the entire system throughout the monitoring period.