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  • 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies  (6)
  • 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology  (6)
  • AGU  (7)
  • Dipartimento della Protezione Civile, Istituto Nazionale di Geofisica e Vulcanologia  (4)
  • American Institute of Physics
  • Blackwell Publishing Ltd
  • Nature Publishing Group
  • Wiley
  • 2005-2009  (12)
  • 1945-1949
Collection
Publisher
Years
Year
  • 1
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    Dipartimento della Protezione Civile, Istituto Nazionale di Geofisica e Vulcanologia
    Publication Date: 2017-04-04
    Description: Importanti sconvolgimenti, conseguenti il terremoto di Messina del 26 dicembre 1908, segnarono il paesaggio in una vasta parte della Calabria e della Sicilia, e in modo particolarmente incisivo nell’area delle maggiori distruzioni. Il censimento sistematico di questi effetti mette in evidenza la grande vulnerabilità dell’area dello Stretto, l’assenza di fenomeni interpretabili in modo certo come effetti di fagliazione superficiale e suggerisce, in particolare per le aree della Sicilia centro–meridionale e occidentale, la presenza di particolari effetti di amplificazione (effetti di sito) in correlazione con forti terremoti come l’evento sismico avvenuto il 28 dicembre 1908.
    Description: Published
    Description: 197-214
    Description: 5.1. TTC - Banche dati e metodi macrosismici
    Description: open
    Keywords: 1908 Messina earthquake ; effects on the environment ; seismit ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 2
    Publication Date: 2017-04-04
    Description: Salina Island (Italy) is located in the central sector of the Aeolian Islands and represents the northernmost volcanic structure of an elongated ridge emplaced on a regional shear zone characterized by NNW-SSE strike-slip faults and by second order N-S and NE-SW faults. High-resolution, low-altitude aeromagnetic data collected in 2003 and 2005 allow us to study the subsurface structure of Salina Island. The magnetic data show a pattern with a wide range of wavelengths and intensities. Magnetic modeling constrained by volcanological data allow us to reconstruct the inner structure of the Salina volcanoes and surrounding marine regions. Long wavelength negative anomalies overlap E-W elongated sedimentary basin related to the Early Pliocene-Pleistocene opening of the Southern Tyrrhenian Sea back-arc basin. The shorter wavelength positive magnetic anomalies are related to the Late Pleistocene-Holocene volcanic (conduits, dikes) and tectonic (faults) structures. The magnetic and volcanological data indicate that the early (168- about 100 ka), basaltic to basaltic andesitic Salina volcanism developed along N-S and NE-SW tectonic structure, whereas the more recent basaltic andesitic to rhyolitic products (about 100-13ka) were emitted by vents related to the main NW-SE fault tectonic structures. The tectonic structures also control the location of the seamounts around the island and the geometry of the volcano-tectonic collapses. The Salina volcanism emplaced on a NNW-SSE regional discontinuity that represents a tear fault of the present-day roll-backing slab in the Southern Tyrrhenian Sea.
    Description: Published
    Description: 1.6. Osservazioni di geomagnetismo
    Description: JCR Journal
    Description: open
    Keywords: volcanoes ; tectonics ; 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2017-04-04
    Description: On 29 June 1170 a large earthquake hit a vast area in the Near Eastern Mediterranean, comprising the present-day territories of western Syria, central southern Turkey, and Lebanon. Although this was one of the strongest seismic events ever to hit Syria, so far no in-depth or specific studies have been available. Furthermore, the seismological literature (from 1979 until 2000) only elaborated a partial summary of it, mainly based solely on Arabic sources. The major effects area was very partial, making the derived seismic parameters unreliable. This earthquake is in actual fact one of the most highly documented events of the medieval Mediterranean. This is due to both the particular historical period in which it had occurred (between the second and the third Crusades) and the presence of the Latin states in the territory of Syria. Some 50 historical sources, written in eight different languages, have been analyzed: Latin (major contributions), Arabic, Syriac, Armenian, Greek, Hebrew, Vulgar French, and Italian. A critical analysis of this extraordinary body of historical information has allowed us to obtain data on the effects of the earthquake at 29 locations, 16 of which were unknown in the previous scientific literature. As regards the seismic dynamics, this study has set itself the question of whether there was just one or more than one strong earthquake. In the former case, the parameters (Me 7.7 ± 0.22, epicenter, and fault length 126.2 km) were calculated. Some hypotheses are outlined concerning the seismogenic zones involved.
    Description: Published
    Description: B07304
    Description: 3.10. Sismologia storica e archeosismologia
    Description: JCR Journal
    Description: reserved
    Keywords: Historical earthquakes ; Syria ; Lebanon ; central southern Turkey ; seismogenic source ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Publication Date: 2017-04-04
    Description: We discuss the tectonic implications of a new residual magnetic map of the Apennine belt/Adriatic-Apulian foreland obtained by integrating ground and offshore data sets [Chiappini et al., 2000a]. Negative anomalies are documented over the Adriatic-Apulian foreland areas, whereas the external Apennine belt is characterized by a ubiquitous lowamplitude (〈30 nT), long-wavelength positive anomaly. In the central northern Apennines, three 100 km wide more intense (100–200 nT) round-shaped anomalies are superimposed to the long-wavelength feature. Finally, in the Tyrrhenian Sea and margins, high-intensity, short-wavelength positive-negative couplets coincide with magmatic outcrops or bodies at shallow depth. The low-amplitude anomaly pattern over Italy suggests that the magnetic basement beneath the Triassic evaporites is ubiquitously incorporated in the external belt compressive fronts, implying a thick-skinned tectonic style for the external Apennines. The new residual magnetic map resolves the inconsistency between previous aeromagnetic data [AGIP SpA. Italia, 1981], which suggested a lack of basement involvement in the Apennine belt, and recent seismic data, which imaged deep reflectors penetrating the basement. Two magnetic models along NE-SW transects in the northern and southern Apennines suggest consistent structural styles. In the northern Apennines, positive anomalies roughly coincide with the external compressive fronts, although there are local second-order differences between the belt front and the edges of the anomaly. Here the magnetic data show that the basement rises southwestward along the thrust fronts from 6–7 km depth in the Adriatic foreland to 2–3 km depth in the axial belt, where some exploration wells have penetrated basement. Within the belt front, basement exhumation is inferred to occur along high-angle, low-displacement thrust faults inverting preexisting normal faults. In the southern Apennines, a remarkable positive magnetic anomaly is parallel with and tens of kilometers southwest of the belt front. Seismic data and oil wells show that the basement surface cannot be shallower in the belt than in the foreland. Therefore the observed magnetic anomaly is produced by strongly magnetic basement beneath the belt, likely an internal crustal wedge tectonically interposed between the Apulian carbonate sequences and basement.
    Description: Published
    Description: 2290
    Description: JCR Journal
    Description: reserved
    Keywords: Magnetic anomalies ; Potential fields ; Apennines ; Crustal modelling ; 04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methods ; 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods ; 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Publication Date: 2017-04-04
    Description: Most of the ancient town of Tindari (NE, Sicily) was settled on a plateau the most surficial layer of which was made of unconsolidated material. Ongoing excavations at the archaeological site at Tindari uncovered a large portion of the decumanus which suffered deformations preliminarily assigned to coseismic effects. An analysis of the local dynamic response through the simulation of strong seismic shaking to the bedrock and modelling of spectral ratios of the bedrock-soft soil was carried out to verify the susceptibility of superficial terrains of the promontory to coseismic deformations. To perform this simulation the finite element method (FEM) was used. Four accelerometric recordings of three earthquakes of medium-high magnitude, recorded on rocky sites, were chosen to simulate the seismic shaking, using a constitutive law for the materials composing the promontory layers both of linear-elastic type and of elastoplastic type. The analysis of the linear-elastic field allowed the definition of the frequencies for which the spectral ratios of the accelerations recorded the highest amplifications; in particular the frequency range 31.5–37.2 Hz can be combined with deformation of the paved floor of the decumanus. The analysis in the elastoplastic field highlighted the zones of promontory more susceptible to suffer plasticization process. The results show that the topmost layer of the decumanus is the most susceptible to suffer plasticization. Therefore, the performed analysis lends greater support to the hypothesis that the deformations were produced by seismic shaking.
    Description: Published
    Description: 213-222
    Description: 3.10. Sismologia storica e archeosismologia
    Description: JCR Journal
    Description: reserved
    Keywords: Fourier analysis ; Elasticity and anelasticity ; Earthquake ground motions ; Site effects ; Computational seismology ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
    Publication Date: 2012-02-03
    Description: Spherical Cap Harmonic Analysis has been applied to obtain a reference model of geomagnetic secular change for Antarctica valid for the last forty years. In this paper, we use the latest available observatory data to update this model and to compare it with the 8th generation IGRF. In addition, the selected set of total field values used for the generation of the Oersted Initial Field Model have been employed together with observatory data to develop the first complete Antarctic Reference Model (ARM). This model improves the fit to the secular variation deduced from observatory data by about 60% relative to IGRF, and the fit to observatory and satellite field data by 8%. The model allows merging data sets taken at different altitudes and epochs in Antarctica, where significant temporal geomagnetic variations occur.
    Description: Published
    Description: 1192
    Description: JCR Journal
    Description: reserved
    Keywords: Geomagnetic reference fields ; Geomagnetic spatial variations (all harmonics and anomalies) ; Geomagnetic time variations - secular and long term ; 04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models ; 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies ; 04. Solid Earth::04.05. Geomagnetism::04.05.05. Main geomagnetic field
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 7
    Publication Date: 2017-04-04
    Description: We show a set of forward model equations in the Fourier domain for calculating the 3D gravity and magnetic anomalies of a given 3D distribution of density or magnetization. One property of the potential-field equations is that they are given by convolution products, providing a very simple analytic expression in the Fourier domain. Under this assumption, the domain of the density or magnetization parameters is connected by a biunivoc relationship with the data space, and potential-field anomalies can be seen as filtered versions of the corresponding density or magnetization distributions. A very fine spatial discretization can be obtained by using a large number of points within a unique 3D grid, where both the source distributions and field data are defined. The main advantage of this formulation is that it dramatically reduces execution times, providing a very fast forward model tool useful for modeling anomalies at different altitudes. We use this method to evaluate an average magnetization of 8 A/m for the Palinuro Seamount in the Tyrrhenian Sea (Southern Italy), thus performing a joint interpretation of morphological and newly acquired magnetic data.
    Description: In press
    Description: 2.6. TTC - Laboratorio di gravimetria, magnetismo ed elettromagnetismo in aree attive
    Description: JCR Journal
    Description: open
    Keywords: magnetic anomalies ; gravity anomalies ; 04. Solid Earth::04.02. Exploration geophysics::04.02.02. Gravity methods ; 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods ; 04. Solid Earth::04.03. Geodesy::04.03.04. Gravity anomalies ; 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies ; 05. General::05.01. Computational geophysics::05.01.05. Algorithms and implementation
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 8
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    Dipartimento della Protezione Civile, Istituto Nazionale di Geofisica e Vulcanologia
    Publication Date: 2017-04-04
    Description: Un excursus storico di oltre duemila anni sintetizza le conoscenze attestate da fonti scritte. Antiche testimonianze, annotazioni in codici medievali, ma anche dettagliate relazioni di epoca moderna e rilevazioni contemporanee consentono di delineare un quadro il più possibile completo della sismicità di quest’area, abitata fin dai tempi più remoti. Emergono diversi terremoti minori, alcuni dei quali quasi dimenticati, che tuttavia confermano un’immagine dell’attività sismica nell’area dello Stretto caratterizzata da eventi frequenti, ma dominata da rari terremoti catastrofici.
    Description: Published
    Description: 215-254
    Description: 3.10. Sismologia storica e archeosismologia
    Description: open
    Keywords: terremoti antichi ; terremoti medievali ; maremoto ; fonti storiche ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 9
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    Dipartimento della Protezione Civile, Istituto Nazionale di Geofisica e Vulcanologia
    Publication Date: 2017-04-04
    Description: Fra i più forti eventi sismici accaduti in Italia per perdite umane e impatto economico, questo terremoto fu paragonato a una guerra perduta. Sulla base di relazioni scientifiche del tempo e documenti istituzionali è qui delineata l’immagine degli effetti nei paesi danneggiati, di cui 462 in Calabria e 240 in Sicilia. Questa grande impronta sul territorio non è solo una drammatica pagina di storia sociale del Paese, ma anche un insieme di dati preziosi per localizzare la sorgente sismica e comprenderne la dinamica.
    Description: Published
    Description: 17-136
    Description: 3.10. Sismologia storica e archeosismologia
    Description: reserved
    Keywords: effetti sismici ; maremoto ; impatto sociale ; costi ; danni economici ; precursori ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 10
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    Dipartimento della Protezione Civile, Istituto Nazionale di Geofisica e Vulcanologia
    Publication Date: 2017-04-04
    Description: È già accaduto nello Stretto, e quando, un terremoto di energia e impatto territoriale simile a quello del 1908? Potrebbe accadere nuovamente, e quando? Questa ricerca è il tentativo di utilizzare un sistema di dati archeologici che delineano dinamiche territoriali e di popolamento per rispondere a una domanda di forte interesse sociale e scientifico. È emersa l’ipotesi di un grande evento sismico accaduto nella seconda metà del IV secolo d.C., congruente con i più recenti dati geofisici e geodetici.
    Description: Published
    Description: 483-516
    Description: 3.10. Sismologia storica e archeosismologia
    Description: reserved
    Keywords: archeologia ; variazioni demografiche ; fonti antiche ; 361-362 d.C. ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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