ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology  (5)
  • 04. Solid Earth::04.07. Tectonophysics::04.07.04. Plate boundaries, motion, and tectonics  (2)
  • 1
    facet.materialart.
    Unknown
    Escursione al bacino del Fucino: evidenze di tettonica distensiva attiva e sismogenetica in Appennino centrale (2007)
    Details
    Publication Date: 2017-04-04
    Description: Società geologica italiana
    Description: Published
    Description: open
    Keywords: tectonic ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: report
    Format: 9990847 bytes
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    From regional seismic hazard to “scenario earthquakes” for seismic microzoning: A new methodological tool for the Celano Project (2015)
    Details
    Publication Date: 2020-02-24
    Description: We present the results of a probabilistic seismic hazard assessment and disaggregation analysis aimed to understand the dominant magnitudes and source-to-site distances of earthquakes that control the hazard at the Celano site in the Abruzzo region of central Italy. Firstly, we calculated a peak ground acceleration map for the central Apennines area, by using a model of seismogenic sources defined on geological-structural basis. The source model definition and the probabilistic seismic hazard evaluation at the regional scale (central Apennines) were obtained using three different seismicity models (Gutenberg–Richter model; characteristic earthquake model; hybrid model), consistent with the available seismological information. Moreover, a simplified time-dependent hypothesis has been introduced, computing the conditional probability of earthquakes occurrence by Brownian passage time distributions. Subsequently, we carried out the disaggregation analysis, with a modified version of the SEISRISK III code, in order to separate the contribution of each source to the total hazard. The results show the percentage contribution to the Celano hazard of the various seismogenic sources, for different expected peak ground acceleration classes. The analysis was differentiated for close (distance from Celano o20 km) and distant (distance from Celano 420 km) seismogenic sources. We propose three different ‘‘scenario earthquakes’’, useful for the site condition studies and for the seismic microzoning study: (1) large (M 1⁄4 6.6) local (Celano-epicentre distance 􏰀16 km) earthquake, with mean recurrence time of 􏰀590 years; (2) moderate (M 1⁄4 5.5) local (Celano-epicentre distance 􏰀7.5 km) earthquake, with mean recurrence time of 􏰀500 years; and (3) large (M 1⁄4 6.6) distant (Celano-epicentre distance 􏰀24 km) earthquake, with mean recurrence time of 􏰀980 years. The probabilistic and time-dependent approach to the definition of the ‘‘scenario earthquakes’’ changes clearly the results in comparison to traditional deterministic analysis, with effects in terms of engineering design and seismic risk reduction. r 2007 Elsevier Ltd. All rights reserved.
    Description: Published
    Description: 3T. Pericolosità sismica e contributo alla definizione del rischio
    Description: JCR Journal
    Description: restricted
    Keywords: Seismic hazard; Seismogenic sources; Time-dependency; Seismic microzoning; Scenario earthquake; Disaggregation analysis ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Frontiers in earth sciences: new ideas and interpretation (2006)
    Istituto Nazionale di Geofisica e Vulcanologia, Editrice Compositori
    Details
    Publication Date: 2019-11-04
    Description: A one-day symposium on new and conventional ideas in plate tectonics and Mediterranean geodynamics was held in Rome on February 19, 2003 at the headquarters of INGV. There were two main reasons for such an initiative. The first was an invitation to Giancarlo Scalera from the «Gabriele D’Annunzio» University of Chieti to present his alternative ideas on global tectonics to final year students of the Regional Geology course. The second was a reciprocal invitation to Giusy Lavecchia and Francesco Stoppa to explain their criticisms of the application of subduction-related models to Italian geology and to present their data on the recently discovered intra-Apennines carbonatite occurrences. It was decided to dedicate an entire day to seminars, involving people with a more conventional approach to geodynamics, especially those involved with seismic tomography. In the last few years, high-resolution mantle tomographic models have been widely used to unravel the geometry of subduction zones. A turning point in the field, however, was a review paper written by Fukao et al. (Rev. Geophysics, 39, 291-323, 2001) showing that there was no clear evidence for slab subduction down to the core-mantle boundary, thus posing a major problem on the balance between the lithosphere subducted at consuming plate margins and the large amount of oceanic lithosphere accreted at diverging plate margins. This prompted the need to re-evaluate the nature of subduction and plate margin evolution. Accepting the theory of plate tectonics, many problems remain open, especially those regarding plate driving mechanisms and their possible link with the forces developed at the core-mantle boundary. Might these forces trigger pulsating tectonic and magmatic activity, with mantle upwellings and large-scale emission of CO2, capable of causing dramatic changes in the composition of the atmosphere and changes at the Earth’s surface? Could these lead to major catastrophic changes in Earth history? During the one-day symposium, a stimulating discussion took place involving different interpretations of observations, especially those relating to the geodynamics of the Mediterranean region. Although the papers in this collection do not provide unique solutions, they do, however, provide new insights into some problems and in some cases suggest new interpretations. Many questions also arise about the relationships between the tectonics of the lithosphere and the deep mantle processes. May the denser portions of the inner parts of the Earth transform into shallower, lighter chemical phases, with a possible increase in the Earth’s volume? May the asthenosphere above growing plume heads be capable of dragging the overlying lithosphere? May mantle plumes be wet rather than hot? Some papers consider gravitation to be a driving mechanism for the nucleation of contractional belts and others even doubt the compressional origin of orogens. Finally – as a link to fundamental physics – an original mechanism of energy conversion from gravitons to photons is proposed as a supply of energy for global tectonic processes. Obviously, because of an often diverse philosophical and scientific background, it is difficult for the ideas presented in this supplement to be shared by all readers and contributors. But we hope that these ideas will help to encourage critical evaluations of some commonly accepted concepts in modern plate tectonic theory. European geoscientists have available to them an exceptional natural laboratory – the Mediterranean and surrounding orogens – complete with all of its paradoxes and contradictions. In this natural laboratory, we hope that new evidence and new solutions to a variety of problems outside of the Mediterranean region will be found!
    Description: Published
    Description: JCR Journal
    Description: open
    Keywords: alternative theories in the Earth sciences ; conventional theories in the Earth sciences ; 04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes ; 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics ; 04. Solid Earth::04.07. Tectonophysics::04.07.04. Plate boundaries, motion, and tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 78012 bytes
    Format: 7264144 bytes
    Format: 5097129 bytes
    Format: 1911585 bytes
    Format: 1660281 bytes
    Format: 2195335 bytes
    Format: 4373266 bytes
    Format: 1470973 bytes
    Format: 720760 bytes
    Format: 5563234 bytes
    Format: 3327762 bytes
    Format: 3125259 bytes
    Format: 164985 bytes
    Format: 61896 bytes
    Format: 60272 bytes
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Crustal structure and seismotectonics of central Sicily (southern Italy): new constraints from instrumental seismicity (2012)
    Wiley-Blackwell
    Details
    Publication Date: 2024-05-09
    Description: In this paper, we propose a new model of the crustal structure and seismotectonics for central Sicily (southern Italy) through the analysis of the depth distribution and kinematics of the instrumental seismicity, occurring during the period from 1983 to 2010, and its comparison with individual geological structures that may be active in the area. The analysed data set consists of 392 earthquakes with local magnitudes ranging from 1.0 to 4.7. We defined a new, detailed 1-D velocity model to relocate the earthquakes that occurred in central Sicily, and we calculated a Moho depth of 37 km and a mean VP/VS ratio of 1.73. The relocated seismic events are clustered mainly in the area north of Caltanissetta (e.g. Mainland Sicily) and in the northeastern sector (Madonie Mountains) of the study area; only minor and greatly dispersed seismicity is located in the western sector, near Belice, and along the southern coast, between Gela and Sciacca. The relocated hypocentral distribution depicts a bimodal pattern: 50 per cent of the events occur within the upper crust at depths less than ~16 km, 40 per cent of the events occur within the middle and depth crust, at depths between 16 and 32 km, and the remaining 10 per cent occur at subcrustal depths. The energy release pattern shows a similar depth distribution. On the basis of the kinematic analysis of 38 newly computed focal plane solutions, two major geographically distinct seismotectonic domains are distinguished: the Madonie Mountain domain, with prevalent extensional and extensional-oblique kinematics associated with upper crust Late Pliocene–Quaternary faulting, and the Mainland Sicily domain, with prevalent compressional and compressional-oblique kinematics associated with thrust faulting, at mid to deep crust depth, along the north-dipping Sicilian Basal Thrust (SBT). The stress inversion of the Mainland Sicily focal solutions integrated with neighbouring mechanisms available in the literature highlights a regional homogeneous compressional tensor, with a subhorizontal NNW–SSE-striking σ1 axis. In addition, on the basis of geodetic data, the Mainland Sicily domain may be attributed to the SSE-ward thrusting of the Mainland Sicily block along the SBT plane. Seismogenic shearing along the SBT at mid-crustal depths was responsible for the unexpected Belice 1968 earthquake (Mw 6.1), with evident implications in terms of hazard assessment.
    Description: Published
    Description: 1237-2252
    Description: 1.1. TTC - Monitoraggio sismico del territorio nazionale
    Description: 3.2. Tettonica attiva
    Description: 3.3. Geodinamica e struttura dell'interno della Terra
    Description: 5.2. TTC - Banche dati di sismologia strumentale
    Description: JCR Journal
    Description: restricted
    Keywords: Seismicity and tectonics ; Continental tectonics: compressional ; Dynamics: seismotectonics ; Crustal structure ; Europe ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous ; 04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution ; 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics ; 04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous ; 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics ; 04. Solid Earth::04.07. Tectonophysics::04.07.04. Plate boundaries, motion, and tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Rates of active compressional deformation in central Italy and Sicily: evaluation of the seismic budget (2015)
    Springer Verlag New York Inc
    Details
    Publication Date: 2024-05-09
    Description: Historical and recent seismicity records and available source mechanisms in eastern-central Italy (Marche–Adriatic region), in mainland-southern Sicily and in the Tyrrhenian offshore of northern Sicily show com- parable deformation patterns. Seismotectonic consider- ations indicate that each of the three areas represents a broad seismogenic province of relatively homogeneous deformation. On the basis of the historical earthquake catalogue, the parameters of the Gutenberg–Richter dis- tribution have been calculated by means of a Monte Carlo simulation method. The average moment tensors have been computed from focal mechanism data and the strain rate and velocity tensors evaluated by means of Kostrov’s (in Izv Acad Sci USSR Phys Solid Earth 1:23–44, 1974) relation, which also considers the shape and size of the seismogenic volume. The uncertainties have been system- atically incorporated. The results show that the three seis- motectonic provinces are all undergoing shortening at seismic rates (*0.3 mm/year in the WSW–ENE direction in the eastern Marche–Adriatic region, *0.1 mm/year in the N–S direction in mainland-southern Sicily and *0.2 mm/year in the NW–SE direction in the Southern Tyrrhenian zone). The motion pattern in the Marche– Adriatic and in the Sicilian provinces suggests that these areas undergo active crust-scale deformation along reverse shear zones, in agreement with recent horizontal GPS motion model and other independent evidence.
    Description: Published
    Description: 2T. Tettonica attiva
    Description: JCR Journal
    Description: restricted
    Keywords: eismotectonics 􏰄 Active thrust faulting 􏰄 Seismogenic crustal deformation 􏰄 Sicily 􏰄 Marche–Adriatic region 􏰄 Southern Tyrrhenian Sea 􏰄 Italy ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Seismogenic evidence of ongoing compression in eastern-central Italy and mainland Sicily: a comparison (2015)
    Details
    Publication Date: 2024-05-09
    Description: We compare the seismogenic role played by two crustal-scale reverse-type shear zones located at the outer border of the Apennine- Maghrebian fold-and-thrust belt system: the westward-dipping Adriatic Basal Thrust (ABT) in eastern-central Italy and the northward-dipping Sicilian Basal Thrust (SBT) in southern Sicily. The epicentral and hypocentral distributions and, whenever possible, the kinematics of a merged dataset of pre-instrumental (1600 to 1900), early instrumental (1901 to 1980) and instrumental (1981 to 2005) earthquakes with moment magnitude ≥4.5 sited within the surface areas above the ABT and the SBT depth-contour lines (0-30 km) are analysed. They are both first-order crustal-scale seismogenic structures which strongly control reverse, reverse-oblique and strike-slip seismic activity. Relatively deep (10-to-30 km) seismicity occurring in the foothills region and in main- land Sicily may be associated with brittle shearing of the middle and lower crust ABT and SBT thrusts segments, whereas the shallow seis- micity (〈10 km) close to the ABT and SBT surface tip line is associated with reverse, oblique and strike-slip shearing of the two upper crust thrust segments and their frontal and lateral splays. Despite that the seismic activity within the two studied areas, and especially in Sicily, is commonly considered minor, several highly damaging earthquakes have struck both areas. In the last four centuries, there is knowledge of 37 events with magnitude 〉5.0 in the Marche-Coastal Adriatic region, among which are the 1741 Fabrianese (Maw 6.08) and 1799 Camerino (Maw 5.93) events, and of 10 events with magnitude 〉5.0 in southern and mainland Sicily, including the 1818 Catanese (Maw 6.00) and 1968 Valle del Belice (Maw 6.12) events. Based on the integration of tectonic and seismological con- straints, the boundaries of two seismogenic compressional provinces located above the ABT and the SBT are defined and the associated values of yearly energy release per unit area evaluated. Similar val- ues are obtained for the ABT (~8E+14 erg/y/km2) and for the SBT (~4E+14 erg/y/km2). The recognition of close geometric, kinematic and seismotectonic similarities between the two compressional provinces, further supported by a comparable level of long-term seis- mic activity, has evident implications both for regional tectonic reconstructions and for seismic hazard assessment purposes.
    Description: Published
    Description: 2T. Tettonica attiva
    Description: N/A or not JCR
    Description: open
    Keywords: Central Italy, Adriatic Sea, Sicily, seismicity, compression, seimogenesis. ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Active thrusting as a possible seismogenic source in Sicily (Southern Italy): Some insights from integrated structural–kinematic and seismological data (2015)
    Details
    Publication Date: 2024-05-09
    Description: This paper proposes a new seismogenic interpretation of mainland and central-southern Sicily, based on an integrated structural–kinematic–seismological approach. Through analysis of available structural and geophysical data, the tectonic setting, the major kinematic units and the crust geometry of the Sicilian southward-verging fold-and-thrust belt system are schematized in sections and in map form. The depth-contour lines of the outermost basal thrust plane, which dates back to Plio-Pleistocene times with some evidence of Holocene activity, are reconstructed. This plane, here named Sicilian Basal Thrust (SBT), emerges along the southward convex Sciacca–Gela–Catania front and reaches the base of the crust at a depth of about 30 km beneath northern Sicily. Additionally, an important regional upper crust splay, with the same arched shape, has been identified some kilometres northward. In order to detect any possible indication of seismogenic activity linked to ongoing deformation of the SBT and its splay, we analyzed the distribution and kinematics of the instrumental seismicity in the period between 1981 and 2006. Particular attention was given to the background seismicity (Ml up to 4.6) located beneath the sedimentary cover at Mt. Etna, as it allows individuating a northward deepening seismogenic volume undergoing an average N–S compression, which corresponds well with the SBT geometry in section view. A merged dataset of all the known major historical and instrumental events (moment magnitude ≥ 4.5) that occurred above the SBT 0-to-30 km depth-contour lines from 217 B.C. to 2006 was compiled and analyzed. Based on information from instrumental data and/or on speculations on the shape and extent of the historical earthquake macroseismic fields, two major ranges of hypocentral depths have been schematically identified within the merged dataset: an upper crust range (in average b~ 10 km) and a mid-to-lower crust range. Focal mechanisms available in the literature show prevailing reverse and reverse-oblique kinematics, compatible with a nearly average N–S shortening and with some field evidence of active fold-and- thrust deformation at the SBT front and along its inner splay. Several moderate earthquakes (nearly 40 in the last 400 years with moment magnitude ranging from 4.5 to 5.5) and a few more energetic events with moment magnitude up to ~ 6.0, such as the Mineo 1624, the Belice 1968 and the Catania 1818 events, can be attributed to an ongoing activity of the SBT. In previous studies, these events had been often attributed to isolated N–S strike-slip sources located within the Hyblean-Pelagian foreland, while all the interposed areas had been considered aseismic, as well as the SBT had been considered inactive. The identification in the SBT of a unique regional-scale seismogenic structure capable to connect the active deformation and the seismic activity of the western, central and eastern areas of mainland Sicily and those of central-southern Sicily evidently has strong implications in terms of seismic hazard assessment. In fact, it allows the definition of a new homogeneous compressional seismotectonic province, which extends between the SBT surface front line and the surface projection of the 25 km SBT depth-contour line. A subdivision in two sub-provinces, a shallow one above the 0–10 km SBT segment and a deep one above the 10-to-25 km SBT segment, is also considered and the energy released of the associate earthquakes evaluated. To conclude, the proposed model is discussed in comparison with other models from the literature and some important open problems are put forwards.
    Description: Published
    Description: 145 – 167
    Description: 2T. Tettonica attiva
    Description: JCR Journal
    Description: restricted
    Keywords: Tectonics; Active thrusting; Earthquake; Seismogenesis; Sicily; Southern Italy ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...