S11 - From Depths to Surface: Exploring volcanic processes by seismic, infrasound and ground deformation signals
- Mariangela Sciotto*, Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Piazza Roma 2, 95125, Catania, Italy, Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
- Andrea Cannata, Università degli Studi di Catania, Dipartimento di Scienze Biologiche, Geologiche e Ambientali - Sezione di Scienze della Terra, Corso Italia 57, I 95129, Catania, Italy, Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
Bellina Di Lieto, Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, Napoli, 80124, Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo. - *Corresponding
Magma and hydrothermal fluids, during their storage or migration towards the surface, trigger several volcanic processes (e.g. pressurization/depressurization, intrusion, gas dynamics), producing ground deformative and seismic signals. If the elastic energy transfer takes place in the very shallow portions of the plumbing system in open conduit conditions, they can also radiate infrasound. Studies of seismic and infrasound signals (volcanic tremor, VT and VLP/LP events), and ground deformation measurements allow: i) exploring physical processes taking place during unrest, eruptive and repose periods, ii) get a detailed imaging of volcano edifice and iii) understanding magmatic and hydrothermal fluid dynamics. Besides, tiltmeter and strainmeter instruments are known to be well suited to detect deformation transients over a broad frequency range up to elastodynamic deformation hence partially covering also seismic frequencies. The ultimate goal of scientists working in volcanic area is eruption forecast, so the identification of “anomaly” in the afore mentioned geophysical signals is another crucial topic in volcano monitoring.
Contributions from novel techniques on geophysical signals, investigations with new strategy or instruments able providing a denser temporal and spatial sampling of the seismic wavefield (e.g. DAS, nodes), are strongly encouraged. Inter-disciplinary approaches and research combining seismic and ground deformation data are particularly welcome.