A5080094007- earthquake and tectonic studies
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Earthquake Detection and Analysis
- High-pressure geophysics and materials
- Chaos control and synchronization
- Nonlinear Dynamics and Pattern Formation
- Geological and Geochemical Analysis
- Geophysics and Sensor Technology
- Landslides and related hazards
- Cleft Lip and Palate Research
- Quantum chaos and dynamical systems
- Craniofacial Disorders and Treatments
- stochastic dynamics and bifurcation
- Biblical Studies and Interpretation
- Underwater Vehicles and Communication Systems
- Methane Hydrates and Related Phenomena
- Seismic Performance and Analysis
- Ferroelectric and Piezoelectric Materials
- Chemistry Education and Research
- Science and Education Research
- Space Science and Extraterrestrial Life
- Underwater Acoustics Research
- Cryospheric studies and observations
Istituto Nazionale di Geofisica e Vulcanologia
2013-2024
Amherst College
2021
University of Edinburgh
2020
Collurania Teramo Observatory
2018
University of Augsburg
2015-2016
Ludwig-Maximilians-Universität München
2011-2014
United States Army War College
2012
Klinik und Poliklinik für Hals-Nasen-Ohren-Heilkunde
2011
München Klinik
2011
Universidade Federal do Rio Grande do Sul
1987-2010
An array of nine three‐component broadband seismometers was deployed in two different configurations on Stromboli volcano. The analysis the seismic wavefield related to volcanic explosions revealed some observations which offer a completely new insight into internal dynamics These are restricted low‐frequency range below 1 Hz and underline, therefore, superiority recordings over conventional short‐period observations. Surprisingly simple wavelets indicate an initially contracting source...
We provide a database of the coseismic geological surface effects following Mw 6.5 Norcia earthquake that hit central Italy on 30 October 2016. This was one strongest seismic events to occur in Europe past thirty years, causing complex ruptures over an area >400 km2. The originated from collaboration several European teams (Open EMERGEO Working Group; about 130 researchers) coordinated by Istituto Nazionale di Geofisica e Vulcanologia. observations were collected performing detailed field...
The origin of the volcanic tremor is still under debate. Many theories have been proposed in last years, but none has yet completely accepted. In 1993, highly sensitive pressure sensors (2.175 Pa/Volt) used to monitor explosive activity at Stromboli revealed unexpected correlation between small spike‐shaped signals (1–2 Pa) and tremor. These pulses repeat regularly time with a recurrent period ca. 1 s. Video camera images allowed us correlate gas bursts occurring one active vents. striking...
Abstract Earthquakes occurring close to hydrocarbon fields under production are often critical view of being induced or triggered. However, clear and testable rules discriminate the different events have rarely been developed tested. The unresolved scientific problem may lead lengthy public disputes with unpredictable impact on local acceptance exploitation field operations. We propose a quantitative approach induced, triggered, natural earthquakes, which is based input parameters. Maxima...
We report that dc-excited discharges in gases display current oscillations which develop into deterministically chaotic behavior. A period-doubling route to chaos characteristic of 1D maps is established for sealed Pl\"ucker's tubes containing helium. Besides this we the observation a scenario showing properties analogous those 2D map H\'enon. Clear sequences period doublings are also reported flowing discharges.
The charge-disordered three-dimensional uniaxial relaxor ferroelectric ${\mathrm{Sr}}_{0.61}{\mathrm{Ba}}_{0.39}{\mathrm{Nb}}_{2}{\mathrm{O}}_{6}$ splits up into metastable polar nanoregions and paraelectric interfaces upon cooling from above ${T}_{c}$. frozen are verified by piezoresponse force microscopy, respond domainlike to dynamic light scattering dielectric excitation, reveal nonergodicity at $T>{T}_{c}$ via global aging, coalesce nanodomains below Contrastingly, the percolating...
Homoclinic chaos is shown to occur in the electric current measured on an electrical discharge argon. We report a clear sequence of four hesitations followed by reverse period doubling. The experimental signals are used construct return-time and time-of-flight maps that evidence Shilnikov scenario system.
On 2012 May 20 and 29, two damaging earthquakes with magnitudes Mw 6.1 5.9, respectively, struck the Emilia-Romagna region in sedimentary Po Plain, Northern Italy, causing 26 fatalities, significant damage to historical buildings substantial impact economy of region. The earthquake sequence included four more aftershocks ≥ 5.0, all at shallow depths (about 7–9 km), similar WNW–ESE striking reverse mechanism. timeline suggests static stress interaction between largest events. We perform here...
ABSTRACT The additional observation of three components rotational ground motions has benefits for tilt-seismometer coupling (e.g., ocean-bottom seismometry and volcano seismology), local site characterization, wavefield separation, source inversion, glacial planetary seismology, as well the monitoring structural health. Field applications have been mostly hampered by lack portable sensors with appropriate broadband operation range weak-motion sensitivity. Here, we present field observations...
A model of many symmetrically and locally coupled chaotic oscillators is studied. Partial synchronizations associated with spontaneous spatial ordering are demonstrated. Very rich patterns the system revealed, based on partial synchronization analysis. The stabilities different partially synchronous spatiotemporal structures some dynamical behaviors these states discussed both numerically analytically.
Abstract Most snow avalanches occur unobserved, which becomes particularly dramatic when human lives are involved. Seismological observations can be helpful to unravel time and dynamics of unseen events, like the deadly avalanche January 18, 2017, that hit a Resort-hotel at Rigopiano in Abruzzi (Italy). Particle motion analysis spectrograms from data recorded by close seismic broadband station, calculation synthetic seismograms, as well simulation flow, allowed us construct buried alive 40...
Explosion‐quake seismograms recorded at Stromboli show that seismic phases with a high‐amplitude and high‐frequency content propagate velocity of approximately 330 m/s ‐ the sound speed. The analysis seismograms, distance 500 m from one three active vents, shows for first onset low‐frequency particle motion characteristic p‐wave, which loses its longitudinal polarization air‐wave. Recording explosion‐quakes simultaneously microphone we could ascertain coincided air‐wave's. In order to better...
Volcano seismology, while its value for surveillance of an active volcano is undebatable, a very demanding field when it comes to station deployment, maintenance, and finally interpreting the measurements. Most valuable in past was deployment arrays sensors evaluate properties entire wavefield order classify, locate, estimate dominant mechanism corresponding sources. While beneficial, array seismographs hard maintain permanent installation at volcano. With advent new instrumentation based on...
Cold CO2 gas emission sites in rainwater-filled pools, so called mofettes, are widely distributed all over Italy. Their reservoirs, mostly having a high content, have magmatic and/or metamorphic origin. Temporal variations fluid expulsions were observed at the mofettes of Caprese Michelangelo during period from 2002 to 2005. These observations made possible by using new approach: photographic time-series. A first interpretation these was based on meteorological/hydrogeological explanations....
The creep and relaxation of domain walls under an ac electric field that are observed in ideal model system, periodically poled superionic KTiOPO4 (KTP), appear to occur different regimes separated by a dynamic phase transition at well-defined frequency, f m = 0.003 Hz, temperature T 233 K. power-law dispersion the susceptibility, χ ∝ 1 + (iωτ)− β (with ≈ 0.4), large nonlinearity encountered for f<f is contrasted with Cole–Cole-type relaxational dispersion, [1 (iωτ)1− α −1 0.3), > m. Similar...
Research Article| July 11, 2018 Seismological Constraints on the Source Mechanism of Damaging Seismic Event 21 August 2017 Ischia Island (Southern Italy) Thomas Braun; Braun aIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Via Vigna Murata, 605, 00143 Rome, Italy, thomas.braun@ingv.itdaniela.famiani@ingv.itcAlso at Observatory, Francesco Redi 13, 52100 Arezzo, Italy. Search for other works by this author on: GSW Google Scholar Daniela Famiani; Famiani...
The dynamical behavior of a ring six diffusively coupled Rössler circuits, with different coupling schemes, is experimentally and numerically investigated using the strength as control parameter. shows partial synchronization all five patterns predicted analyzing symmetries are obtained experimentally. To compare experiment, has been integrated results in good qualitative agreement experimental ones. analyzed through graphs generated plotting y variable ith circuit versus jth circuit. As an...
We assess the first mission of GEOSTAR (GEophysical and Oceanographic STation for Abyssal Research) deep-sea multidisciplinary observatory its technical capacity, performance quality recorded data. The functioning system was verified by analyzing oceanographic, seismological geomagnetic measurements. Despite mission's short duration (21 days), data demonstrated observatory's technological reliability scientific value. After oceanographic data, we found two different regimes seawater...
Abstract The first stage of the trial in L'Aquila (Italy) ended with a conviction seven experts, convened by head Civil Protection on 31 March 2009, for multiple manslaughter and serious injuries. They were sentenced to six years jail, perpetual interdiction from public office fine several million euros be paid victims earthquake 6 April 2009 (moment magnitude 6.3) having caused, their negligent conduct, death 29 persons injury others. verdict had tremendous impact scientific community way...
The ac susceptibility of the uniaxial relaxor strontium barium niobate, Sr 0.61 Ba 0.39 Nb 2 O 6 , quantum ferroelectric titanate, SrTi 18 3 and periodically poled superionic potassium titanyl phosphate, KTiOPO 4 reveals different modes in dependence on frequency. Relaxation domain wall segments creep, respectively, are connected by a dynamical transition with universal properties as described scaling theory walls random media. depinning frequency obeys Arrhenius activation, dielectric...
The combination of the latest geophysical instruments and geochemical methods applied to arc volcanism (Aeolian Islands, Italy) has given new insights on role active tectonics fluids migration. A continuous monitoring hydrothermal system off island Panarea shown contemporaneous modifications vented seismic activity nearby Stromboli volcano. almost contemporary start last volcanic crisis at in 2002, besides variation 3 He/ 4 He ratios both islands large number submarine crater‐shaped...
Abstract Public concern about anthropogenic seismicity in Italy first arose the aftermath of deadly M ≈ 6 earthquakes that hit Emilia-Romagna region (northern Italy) May 2012. As these events occurred a (tectonically active) oil and gas production storage, question was raised, whether stress perturbations due to underground industrial activities could have induced or triggered shocks. Following expert recommendations, 2014, Italian Oil & Gas Safety Authority (DGS-UNMIG, Ministry Economic...
ABSTRACT Earthquake hypocentral location is perhaps the most classical problem in seismology, solution of which often affected by significant uncertainty. In monitoring effects underground anthropogenic activities, earthquake location, magnitude, and ground motions are important parameters for managing induced seismicity (as e.g., operating traffic-light systems). Such decisional systems define operative reactions to be enacted once an earthquake, exceeding some magnitude or ground-motion...