A5054883091- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Meteorological Phenomena and Simulations
- Geology and Paleoclimatology Research
- Geophysical Methods and Applications
- Planetary Science and Exploration
- Landslides and related hazards
- Disaster Management and Resilience
- Astro and Planetary Science
- Geophysics and Sensor Technology
- Seismic Performance and Analysis
- Cryospheric studies and observations
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Isotope Analysis in Ecology
- Public Relations and Crisis Communication
- Tropical and Extratropical Cyclones Research
- Structural Health Monitoring Techniques
- Methane Hydrates and Related Phenomena
- Radioactivity and Radon Measurements
Istituto Nazionale di Geofisica e Vulcanologia
2015-2024
Osservatorio Astrofisico di Catania
2017
INGV Osservatorio Etneo
2005-2017
University of Messina
1997
University of Southern California
1992
Understanding physical processes prior to and during volcanic eruptions has improved significantly in recent years. However, uncertainties about subsurface structures distorting observed signals undetected within the volcano prevent volcanologists infer subtle triggering mechanisms of phenomena. Here, we demonstrate that distributed acoustic sensing (DAS) with optical fibres allows us identify events remotely image hidden near-surface structural features. We detect characterize strain...
Abstract In November 2019, the fourth Volcano Observatory Best Practices workshop was held in Mexico City as a series of talks, discussions, and panels. Volcanologists from around world offered suggestions for ways to optimize volcano-observatory crisis operations. By crisis, we mean unrest that may or not lead eruption, eruption itself, its aftermath, all which require analysis communications by observatory. During priority observatory should be acquire, process, analyze, interpret data...
We mapped b ‐values in three dimensions a cube of the crust with approximately 20 km under Mt. Etna. The earthquake catalog used contains 450 events M≥2.5 for 1990‐1997.9. Comparison derived from samples N =50 events, extracted volumes radii ranging 2.5 to 6 km, showed statistically highly significant differences between =1.5±0.3 most and =3.0±0.5 two r ≤5 one located 2 E summit Etna at 10±3 depth other WSW about 3±2 below sea level. interpret these high ‐value anomalies as an expression...
Abstract Two paroxysmal explosions occurred at Stromboli volcano in the Summer 2019, first of which, on July 3, caused one fatality and some injuries. Within 56 days between two explosions, effusive activity from vents located summit area occurred. No significant changes routinely monitored parameters were detected before explosions. However, we have calculated polarization fractal dimension time series seismic signals November 15, 2018 to September 2019 recognized variations that preceded...
Abstract The Istituto Nazionale di Geofisica e Vulcanologia (INGV) is an Italian research institution with focus on earth sciences. Moreover, the INGV operational center for seismic surveillance and earthquake monitoring in Italy a part of civil protection system as expertise seismic, volcanic, tsunami risks.INGV operates National Seismic Network other networks at national scale primary node European Integrated Data Archive archiving distributing strong-motion weak-motion recordings. In...
Volcano-seismic signals can help for volcanic hazard estimation and eruption forecasting. However, the underlying mechanism their low frequency components is still a matter of debate. Here, we show signatures dynamic strain records from Distributed Acoustic Sensing in frequencies at Vulcano Island, Italy. Signs unrest have been observed since September 2021, with CO2 degassing occurrence long period very events. We interrogated fiber-optic telecommunication cable on-shore off-shore linking...
Continuous soil radon monitoring was carried out near the Southeast Crater (SEC) of Mt. Etna during 10‐day July 2006 Strombolian‐effusive eruption. This signal compared with simultaneously acquired volcanic tremor and thermal radiance data. The onset explosive activity a lava fountaining episode were preceded by some hours increases in emission 4–5 orders magnitude, which we interpret as precursors. Minor changes eruptive behavior did not produce significant variations monitored parameters....
In this paper we report seismological evidence regarding the emplacement of dike that fed July 18 - August 9, 2001 lateral eruption at Mt. Etna volcano. The shallow intrusion and opening eruptive fracture system, which mostly occurred during 12, 18, were accompanied by one most intense seismic swarms last 20 years. A total 2694 earthquakes (1 £ Md 3.9) recorded from beginning swarm (July 12) to end (August 9). Seismicity shows upward migration basement relatively thin volcanic pile. clear...
Abstract Between January 2011 and April 2013, Mt. Etna's eruptive activity consisted of episodic intracrater strombolian explosions paroxysms from Bocca Nuova, Voragine, the New South‐East (NSEC) summit craters, respectively. Eruptions NSEC initial increasing lava flow output, passing to short‐lasting fountaining. In this study we present seismic, infrasound, radiometric, plume SO 2 HCl fluxes geodetic data collected by INGV monitoring system between May 2012 2013. The multiparametric...
Active volcanoes produce inaudible infrasound due to the coupling between surface magmatic processes and atmosphere. Monitoring techniques based on measurements have been proved capable of producing information during volcanic crises. We report observations collected from an network Mt. Etna which enabled us detect locate a new summit eruption May 13, 2008 when poor weather inhibited direct observations. Three families signals were identified that allowed evolution be accurately tracked in...
Volcanic tremor and low frequency events, together with infrasound signals, can represent important precursory phenomena of eruptive activity because their strict relationship mechanisms fluid flows through the volcano's feeding system. Important variations these seismo‐volcanic recorded at Mt. Etna volcano, occurred both in medium‐ short‐term before eruption, that took place on 13 May 2008. The most significant changes were observed content location LP as well volcanic location, allowed us...
Active volcanoes generate sonic and infrasonic signals, whose investigation provides useful information for both monitoring purposes the study of dynamics explosive phenomena. At Mt. Etna volcano (Italy), a pattern recognition system based on waveform features has been developed. First, by parametric power spectrum method, describing characterizing infrasound events were extracted: peak frequency quality factor. Then, together with peak-to-peak amplitude, these constituted 3-D 'feature...
Abstract La Fossa Caldera at Vulcano (Italy) has been showing signs of unrest since September 2021. To investigate this phenomenon, we conducted an analysis geodetic and seismological data from July to December In particular, analyzed Multi Temporal Interferometric Synthetic Aperture Radar Global Navigation Satellite System data, a pronounced elliptical uplift signal, which elaborated using analytical source modeling. Additionally, seismic were used identify seismicity associated with...
Soil radon emissions have been proved as a useful tool for predicting earthquakes and volcanic eruptions furthermore aided in determining the location of active faults. Continuous monitoring was carried out near Southeast Crater Mt. Etna September–November 1998, during period frequent eruptive episodes at that crater. Radon anomalies were detected when accompanying tremor became increasingly intense: no activity observed first five, weaker, episodes, whereas significant spikes preceded...
We investigated the banded tremor activity occurring at Mt. Etna volcano between August–October 2008 during 2008–2009 eruption. The occurred in episodes lasting 25–30 min with intervals of about 25 min. Seismic signal analyses showed that was characterized by spectral contents, wavefields, and source locations differed from “ordinary” volcanic tremor. infrasound recordings exhibited an intermittent infrasonic alternating episodes. Finally, nonlinear suggested a system can be considered...
On multi‐vents volcanoes changes in activity between different vents reflect a complex fluid‐dynamics of the shallow feeding systems and are often explained numerically experimentally terms conduit branches bifurcations. We present new geophysical constraints on system Etna volcano derived from array analysis infrasound radiated two distinct sources, one located SE crater Voragine or NE (VNE). These sources alternated their behavior, with VNE radiating low amplitude background interrupted by...
Abstract Real‐time assessment of the state a volcano plays key role for civil protection purposes. Unfortunately, because coupling highly nonlinear and partially known complex volcanic processes, intrinsic uncertainties in measured parameters, needs to be expressed probabilistic terms, thus making any rapid sometimes impractical. With aim aiding on‐duty personnel volcano‐monitoring roles, we present an expert system approach automatically estimate ongoing from all available measurements. The...
After a period of mild eruptive activity, Stromboli showed between 2017 and 2018 reawakening phase, with an increase in the activity starting May 2017. The alert level volcano was raised from “green” (base) to “yellow” (attention) on 7 December 2017, small lava overflowed crater rim 15 Between July August monitoring networks recorded nine major explosions, which are serious hazard for because they affect summit area, crowded by tourists. We studied 2017–2018 phase through analysis...