A5066028317- Seismology and Earthquake Studies
- Geophysics and Gravity Measurements
- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- Geological and Geochemical Analysis
- Geophysical and Geoelectrical Methods
- GNSS positioning and interference
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Geophysics and Sensor Technology
- Pulsars and Gravitational Waves Research
- Geological Modeling and Analysis
- Geological and Geophysical Studies Worldwide
- Seismic Imaging and Inversion Techniques
- Geomagnetism and Paleomagnetism Studies
- Cryospheric studies and observations
- Computational Physics and Python Applications
- Meteorological Phenomena and Simulations
- Hydrocarbon exploration and reservoir analysis
- Tree-ring climate responses
- Data Mining Algorithms and Applications
- Particle Detector Development and Performance
INGV Osservatorio Etneo
2018-2024
Osservatorio Astrofisico di Catania
2018-2024
Istituto Nazionale di Geofisica e Vulcanologia
2013-2023
Abstract We present the world's first time series acquired in summit area of an active volcano with absolute atom interferometry gravimeter. The device was installed ∼2.5 km from craters Mt. Etna and produced a continuous high–quality gravity series, despite unfavorable environmental conditions at installation site occurrence phases high volcanic tremor during acquisition interval. Comparison data superconducting gravimeters elsewhere on highlights correlated anomalies, demonstrating that...
States of volcanic activity at Mt Etna develop in well-defined regimes with variable duration from a few hours to several months. Changes the are usually concurrent variations characteristics tremor, which is continuously recorded as background seismic radiation. This strict relationship useful for monitoring any moment and whatever condition. We investigated development tremor features its relation applying pattern classification techniques. present results supervised unsupervised methods...
Repeated and continuous gravity measurements have long been performed to monitor active volcanoes study the processes that may lead unrest eruptions. Possible instrumental effects must be accurately accounted for, since they can behind apparent changes even stronger than real (i.e., volcano-related) ones.At tall volcanoes, where, due rough topography, difference between field values at external summit stations hundreds of mGal, strong time in arise from calibration factor device used perform...
The validation of compatibility and long-term stability absolute gravimeters is a key component for the realization International Terrestrial Gravity Reference Frame (ITGRF) IAG relevant metrology, in particular kilogram. Because natural reference value gravity acceleration not accessible, international comparisons are well established. realized based on set accurate measurements functional model their processing. After CCM.G-K2.2023 comparison supplemented by additional ICAG-2023...
Knowledge of the spatio-temporal changes in characteristics and distribution subsurface fluids is key to properly addressing important societal issues, including: sustainable management energy resources (e.g., hydrocarbons geothermal energy), water resources, assessment hazard volcanic eruptions). Gravimetry highly attractive because it can detect mass, thus providing a window into processes that involve deep fluids. However, high cost operating features associated with current...
<p>In this work, we present a new catalog of focal mechanisms calculated for earthquakes recorded in Sicily and southern Calabria. It comprises about 300 solutions, events with magnitudes ranging from 2.7 to 4.8 that occurred 1999 2011. We used P-wave polarities compute the fault-plane solutions. Two main goals are achieved. For first, allows stress regime kinematics characterizing studied area be depicted at regional more local scale. In particular, moving along tectonic lineament...
Abstract We focus on a sequence of 9 lava fountains from Etna that occurred in 2011, separated by intervals 5 to 10 days. Continuous measurements allowed discover the occurrence gravity decreases before onset most fountaining episodes. propose changes are due pre-fountaining accumulation foam layer at shallow levels plumbing system volcano. Relying relationship between amount gas trapped and emitted during each episode, we develop conceptual model mechanism controlling passage Strombolian...
UAVs have become a useful tool for natural hazard monitoring. In volcanic areas, they allow wider observations of the eruptive behaviour, with no risk operator. The SfM technique enables obtaining orthoimages lava flows and DEM in short time. These data are also to estimate flow volumes mass output rate characterizing an eruption. We present results ten UAV surveys made during after 30 May – 6 June 2019 eruption Etna volcano, projecting time context back until 1999. Orthoimages taken on...
We provide a database of the surface ruptures produced by 26 December 2018 Mw 4.9 earthquake that struck eastern flank Mt. Etna volcano in Sicily (southern Italy). Despite its relatively small magnitude, this shallow caused about 8 km faulting, along trace NNW-trending active Fiandaca Fault. Detailed field surveys have been performed epicentral area to map and characterize their kinematics. The show dominant right-oblique sense displacement with an average slip 0.09 m maximum value 0.35 m....
Early-warning assessment of a volcanic unrest requires that accurate information from monitoring is continuously gathered before activity starts. Seismic data are an optimal source such information, overcoming safety problems due to dangerous conditions for field surveys or cloud cover may hinder visibility. We designed multi-station warning system based on the classification patterns background seismic radiation, so-called tremor, by using Self-Organizing Maps (SOM) and fuzzy clustering....
<p>Seismic noise recorded by a temporary array installed around Pozzo Pitarrone, NE flank of Mt. Etna, have been analysed with several techniques. Single station HVSR method and SPAC applied to stationary seismic investigate the local shallow structure. The inversion dispersion curves produced shear wave velocity model area reliable down depth about 130 m. A comparison such stratigraphic information available for investigated shows good qualitative agreement. Taking advantage borehole...
Abstract The study of the kinematics and stress field related to seismicity makes an important contribution understanding tectonic processes. In this kind analysis, a crucial issue is identifying seismically homogeneous areas, which implies data classification cluster creation. We present approach that combines unsupervised learning techniques in order reveal patterns focal mechanisms set. particular, combination two popular clustering algorithms, is, self‐organizing maps Fuzzy C‐means, was...
Abstract We report on a high‐resolution, low‐altitude aeromagnetic investigation of the central Apennine extensional seismogenic zone, hit by destructive historical earthquakes including 2009 L'Aquila seismic sequence. Central Apennines are predominantly made thick (>4 and possibly up to 12 km) packages shelf deep marine limestones dolomites Mesozoic age, unconformably covered upper Pliocene‐Holocene continental sediments lying (often active) normal fault hanging walls. Seismogenic faults...
Abstract The purpose of this work is to provide the methodological and instrumental framework for establishment a new absolute gravity height reference network in Sicily. aim contribute systems Italian area, useful scientific technological activities related field proper definition modern system region. composed 5 stations, evenly distributed form large mesh, which roughly covers entire Since four five selected stations were measured also 1990s, it was possible evaluate whether long-term...
The regional key comparison of absolute gravimeters, EURAMET.M.G-K3 and the simultaneously organized additional comparison, was held in Germany at Geodetic Observatory Wettzell German Federal Agency for Cartography Geodesy spring 2018. Here we present list participants who actually performed measurements during data submitted by operators as well results determination gravity a function height sites. measurement strategy is briefly discussed harmonization documented. Finally, constrained...
A multidisciplinary strategy integrating a data set obtained using different mthods and techniques, ranging from remote sensing (UAV system, FTIR, thermal imaging) to direct field measurements (soil heat flux, soil CO2 gravimetry geomagnetism) proved highly capable of modeling regions affected by pressurized fluids circulation extreme natural environments. As test site, the Salinelle mud volcanoes area, located close city Paternò (Sicily), was selected. This area is characterized gas...
From the 2010s on, pattern classification has proven an effective method for flagging alerts of volcano unrest before eruptive activity at Mt. Etna, Italy. The analysis been applied online to volcanic tremor data, and supported surveillance that provides timely information Civil Protection other authorities. However, after declaring alert, no one knows how long will last if a climactic actually begin. These are critical aspects when considering effects prolonged state alert. An example...