GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.2 GNGTS 2024 ACU – Sviluppo di una rete prototpale per lo studio delle emissioni acustche associate ai micro-processi dislocatvi C. Bidini 1 , D. Sabatni 2 , A. Govoni 3 , G. Romeo 4 , D. Famiani 4 , G. Di Stefano 4 , G. Spinelli 4 , G. De Luca 3 , M. Anselmi 3 , A. Frepoli 3 , A. Gatuso 5 , T. Braun 1 1 Isttuto Nazionale di Geofsica e Vulcanologia, Sezione di Roma1, Arezzo, Italy 2 Università degli Studi “Roma Tre”, Roma, Italy 3 Isttuto Nazionale di Geofsica e Vulcanologia, Sezione ONT, Roma, Italy 4 Isttuto Nazionale di Geofsica e Vulcanologia, Sezione di Roma1, Roma, Italy 5 Isttuto Nazionale di Geofsica e Vulcanologia, Sezione di Palermo, Milazzo, Italy The main objectve of the project ACU is to develop a prototypical network of infrasound sensors, for use on a natonal scale, dedicated to the monitoring of acoustc waves propagatng in the atmosphere in the same frequency range as seismic waves. The range of applicatons to be covered by this new facility range from volcanic monitoring, detecton of anthropogenic events and earthquake rumbles, as well as monitoring of other natural phenomena, like avalanches, landslides or rock falls. Coupling of acoustc waves into the ground has been frst noted on actve volcanoes around the world, like e.g., Mt. S. Helens (Kiefer, 1981), Pavlov volcano (Mc Nut, 1986; Garces et al., 2000); the identfcaton of air-waves even in seismograms from moderate explosion-quakes and volcanic tremor was frst reported by (Braun & Ripepe, 1993, Kedar et al., 1996; Ripepe et al., 1996; Hagerty et al., 2000). The project is divided in the following steps: - Development of an acoustc wave generator for calibraton of the available sensors. - Comparison and calibraton of commercial infrasound sensors. - Cost-beneft analysis - Installaton of an infrasonic array equipped with high-quality infrasound sensors for the detecton and directonal analysis of the recorded acoustc waves. - Preparaton of a portable infrasound network, to be deployed in the epicentral area in case of signifcant seismic events. - Development and/or individuaton of a low-cost sensor for a future widespread equipment of seismic and volcano-seismic networks by infrasound sensors. - Test measurements in the ultrasonic range (> 20 kHz) inside the Natonal Gran Sasso Laboratory (acoustc emission).