Using dense seismo-acoustic network to provide timely warning of the 2019 paroxysmal Stromboli eruptions

Abstract Stromboli Volcano is well known for its persistent explosive activity. On July 3rd and August 28th 2019, two paroxysmal explosions occurred, generating an eruptive column that quickly rose up to 5 km above sea level. Both events were detected by advanced local monitoring networks operated Istituto Nazionale di Geofisica e Vulcanologia (INGV) Laboratorio Sperimentale of the University Firenze (LGS-UNIFI). Signals also recorded Italian national seismic network at a range hundreds kilometres infrasonic arrays distances 3700 km. Using state-of-the-art propagation modeling, we identify various infrasound phases are used precise timing eruptions. We highlight advantage dense regional seismo-acoustic enhance volcanic signal detection in poorly monitored regions, provide timely warning eruptions reliable source amplitude estimate Volcanic Ash Advisory Centres (VAAC).