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
  • 1
    facet.materialart.
    Unknown
    High-frequency wave propagation from mantle earthquakes in the Tyrrhenian Sea: New constraints for the geometry of the south Tyrrhenian subduction zone (1998)
    In:  Geophys. Res. Lett., Hannover, Conseil de l'Europe, vol. 25, no. 15, pp. 2877-2880, pp. L04301, (ISSN: 1340-4202)
    Details
    Publication Date: 1998
    Description: Propagation of shear waves produced by 25 mantle earthquakes (80-600 km depth) in the subduction zone of the south Tyrrhenian Sea (southern Italy) has been investigated to infer the geometry and extent of the descending lithosphere. From all hypocentral depths high-frequency, high-amplitude shear waves are recorded at most of the stations in southern Italy and easternmost Sicily. This shear-wave energy is interpreted to travel as a guided wave within the descending slab. In contrast, shear waves are either not recorded at all or they are recorded as low-frequency, low-amplitude signals at stations located in the peninsular part of Italy north of the Calabrian arc, in western Sicily and in Sardinia. This systematic S-wave attenuation is interpreted in terms of an active and continuous slab correlated with and limited to the Calabrian arc.
    Keywords: High frequency ... ; Wave propagation ; Hypocentral depth ; Italy ; Subduction zone ; Seismicity ; Shear waves ; GRL
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    BIBLIOGRAPHY SEISMOLOGY
  • 2
    facet.materialart.
    Unknown
    Azimuth-dependent amplification of weak and strong ground motions within a fault zone (Nocera Umbra, central Italy) (2007)
    Agu
    Details
    Publication Date: 2017-04-04
    Description: During three moderate-magnitude earthquakes occurred in September–October 1997 in the central Apennines, Italy, accelerations larger than 0.5 g were recorded in the town of Nocera Umbra, 10 to 15 km N-NW of the epicenters. The accelerograph is sited in a fault zone, close to a N30 E tectonic contact. Six temporary seismological stations installed across the fault recorded 82 aftershocks occurred in two seismogenic zones: the Colfiorito-Sellano area, S-SE of the array, and the Gualdo Tadino area, to the north. The array data reveal large variations in terms of both peak ground motions and spectral amplitudes. Within the fault zone, amplifications show a strong dependence on the source azimuth. At the accelerograph site, the effects are particularly large for events from S-SE: peak ground motions are a factor of 14 larger than those of a reference site and conventional spectral ratios attain amplitudes as large as 50 at 7 Hz along the N30 E direction of motion, parallel to the strike of the fault. Nineteen strong motion accelerograms were then used to compare ground motion properties between weak and strong events up to M0 = 1.2 1025 dyn cm. A particle motion analysis shows that the directional effect is also present in the strongest motions, even though the amplification of peak ground motion decreases when M0 increases. Results from stochastic simulations indicate that such a behavior is not due to nonlinearity: applying the empirical weak motion transfer functions in a purely linear model the observed peak ground motions of the largest events are fit satisfactorily.
    Description: Published
    Description: 2156
    Description: JCR Journal
    Description: reserved
    Keywords: site effects ; fault zone ; 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
    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
    Large amplification of ground motion at rock sites within a fault zone in Nocera Umbra (central Italy) (2007)
    Kluwer
    Details
    Publication Date: 2017-04-04
    Description: During the two mainshocks of September 26, 1997 in the Umbria-Marche border a strong-motion accelerograph recorded peak ground accelerations as large as 0.6 g, approximately, in the town of Nocera Umbra, at distances of 10 to 15 km from the epicentres. This value is significantly larger than expected on the basis of the usual regressions with magnitude and distance. A broad-band amplification up to a factor of 10 was consistently estimated in previous papers, using both weak and strong motion data recorded at the accelerograph site during local moderate earthquakes. To study the cause of this amplification we deployed six seismologic stations across the tectonic contact between the Ceno-Mesozoic limestone and the Mesozoic marly sandstone where the accelerograph is installed. Seismograms of 21 shallow aftershocks in the magnitude range from 2.2 to 4.0 and a subcrustal Mw = 5.3 event are analysed. Regardless of epicentre location, waveforms show a large complexity in an approximately 200 m wide band adjacent to the tectonic contact. This is interpreted as the effect of trapped waves in the highly fractured, lower velocity materials within the fault zone.
    Description: Published
    Description: 543-554
    Description: JCR Journal
    Description: reserved
    Keywords: site effects ; central Italy ; 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    The Italian strong motion data base: design, data input and web distribution (2008)
    Istituto Nazionale di Oceanografia e di Geofisica Sperimentale
    Details
    Publication Date: 2017-04-04
    Description: A new Italian strong-motion data base was created during a joint project between Istituto Nazionale di Geofisica e Vulcanologia (INGV, Italian Institute for Geophysics and Vulcanology) and Dipartimento della Protezione Civile (DPC, Italian civil protection). The aim of the project was the collection, homogenization and distribution of strong motion data acquired in the time span 1972-2004 in Italy by different institutions, namely Ente Nazionale per l’Energia Elettrica (ENEL, Italian electricity company), Ente per le Nuove tecnologie, l’Energia e l’Ambiente (ENEA, Italian energy and environment organization) and DPC with different purposes, such as permanent strong motion monitoring and temporary monitoring during seismic sequences or before permanent installation. The data base contains 2182 three component waveforms generated by 1004 earthquakes with a maximum moment magnitude of 6.9 (1980 Irpinia earthquake) and can be accessed on-line at the site http://itaca.mi.ingv.it, where a wide range of search tools enables the user to interactively retrieve events, recording stations and waveforms with particular characteristics, whose parameters can be specified, as needed, through user friendly interfaces. A range of display options allows users to view data in different contexts, extract and download time series and spectral data. This article describes the data base structure and the working steps which led to the completion of the project.
    Description: In press
    Description: 5.2. TTC - Banche dati di sismologia strumentale
    Description: N/A or not JCR
    Description: open
    Keywords: Strong-ground motion ; database ; 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
    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
    ITACA (ITalian ACcelerometric Archive): a Web Portal for the Dissemination of the Italian Strong Motion Data (2008)
    Seismological Society of America
    Details
    Publication Date: 2017-04-04
    Description: The Italian strong-motion database contains 2182 three component waveforms generated by 1004 earthquakes with a maximum magnitude of 6.9 (1980 Irpinia earthquake) covering the period range from 1972 to 2004. The database is devoted to serving the seismological and engineering communities. The database can be accessed on-line at the site http://itaca.mi.ingv.it, where a wide range of search tools enables the user to interactively search events, recording stations and retrieve waveforms with particular characteristics, whose parameters can be specified, as needed, through a graphical user interface. A range of display options allows users to view data in different contexts, extract and download time series and spectral data. The database was created during a joint project between Istituto Nazionale di Geofisica e Vulcanologia (INGV, Italian institute for geophysics and vulcanology) and Dipartimento della Protezione Civile (DPC, Italian civil protection). The aim of the project was the collection, homogenization and distribution of data acquired over the time period 1972-2004 in Italy by different Italian institutions, namely Ente Nazionale per l’Energia Elettrica (ENEL, Italian electricity company), Ente per le Nuove tecnologie, l’Energia e l’Ambiente (ENEA, Italian energy and environment organization) and DPC. The project had multiple purposes, such as permanent strong motion monitoring and temporary monitoring during seismic sequences or before permanent installation. This database brings up to date the ENEA strong motion data collection which ended in 1993 and the European database where the most recent Italian data pertain to the Umbria-Marche sequence of 1997-1998 (Ambraseys at al., 2002). In addition effort was spent reviewing strong motion metadata and data processing to increase data quality and reliability. This article describes the steps that led to the completion of the project and provides an overview of the search capabilities available at the database interface website.
    Description: Published
    Description: 716-722
    Description: 5.2. TTC - Banche dati di sismologia strumentale
    Description: JCR Journal
    Description: open
    Keywords: strong-ground motion ; database ; 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
    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
    Moho deepening and shallow upper crustal delamination beneath the central Apennines (2010)
    Elsevier
    Details
    Publication Date: 2017-04-04
    Description: Geologic interpretation of seismic data along the eastern half of the CROP 11 deep seismic reflection profile, running across the central Apennines, indicates that the Adriatic Moho deepens gradually from 34 km in the foreland areas to 47 km beneath the core of the belt. This deepening is in agreement with local Moho depths estimated from teleseismic receiver functions at several stations installed along the CROP 11 profile. On the contrary, DSS (Deep Seismic Soundings) data image the Moho at shallower depths. The deepening of the Adriatic Moho illustrated in this paper supports the westward downgoing of a portion of Adriatic continental crust and is consistent with the regional gravity anomalies, provided that very high-density rocks are present above the Moho at the core of the central Apennine belt. We discuss geophysical and geologic data in the framework of alternative models of delamination of the Adriatic crust at different depth.
    Description: Published
    Description: 1-12
    Description: 3.3. Geodinamica e struttura dell'interno della Terra
    Description: JCR Journal
    Description: partially_open
    Keywords: Moho depth ; CROP 11 ; Central Apennines ; Italy ; 04. Solid Earth::04.02. Exploration geophysics::04.02.99. General or miscellaneous
    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
    Mud volcano fields in the Mt. Etna area (eastern Sicily) (2012)
    Paris Sorbonne Université
    Details
    Publication Date: 2012-02-23
    Description: In this paper we describe briefly the activity and evolution of four mud volcano fields located in eastern Sicily, around the Mt. Etna edifice. Three of them, called “Salinelle dei Cappuccini”, “Salinelle del Fiume” and “Salinelle del Vallone Salato” based on their location, occur on the southewestern flank of Etna, between the Paternò and Belpasso villages, and are presently active. The fourth one, today extinct, was active on the farest northeastern sector of Etna, along the Ionian Sea coastline. It was called “Salsa di Fondachello” after the name of the closest village. Geologic surveys and well drillings suggest that fluids uprise through pre-existing volcanic necks in the “Salinelle dei Cappuccini” and “Salinelle del Fiume”, while for the “Salinelle del Vallone Salato” an alternative pathway through a fault plane is also proposed. The morphologic evolution of the Etnean mud volcano fields depends mainly on the density of the emitted muds and secondarily on the preexisting ground topography. Chemical analyses revealed that the water coming out from the mud volcanoes originates from a deep aquifer confined in the carbonatic rocks of the Etna basement and that the most abundant escaping gas is CO2 of magmatic origin. The “Salsa di Fondachello” first activity is associated with the occurrence of the destructive Val di Noto earthquake, on January 11th, 1693. It was again active from 1795 to 1832. Its last activity, started in March 1847, came to an end with the collapse of the mud volcano. Today a weak methane emission is the only evidence of endogenous activity in this area.
    Description: Published
    Description: Paris Sorbonne Université, Paris
    Description: open
    Keywords: mud volcanoes ; Mt. Etna ; Sicily ; Italy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Extended abstract
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    Evidence of crustal thickening beneath the central Apennines (Italy) from teleseismic receiver functions (2007)
    Elsevier
    Details
    Publication Date: 2017-04-04
    Description: We computed receiver functions of teleseismic events that occurred within a distance of 35–90° and were recorded in central Italy by 15 temporary stations and 1 permanent station. In the receiver functions we identified the P-to-S phase converted at the Moho discontinuity beneath each station and estimated crustal thickness from the time delay of this phase with respect to the direct P arrival. For the temporary stations this relatively simple approach is justified given their limited recording period. To the permanent station we also applied the slant stacking technique to try to constrain the bulk crustal Vp/Vs and validate our estimate of crustal thickness. Our results show that, in central Italy, the Moho is shallow (∼22 km) beneath the Tyrrhenian margin of the peninsula and deepens toward the east. Beneath the central Apennines, Moho depth ranges from 39 to 47 km. The thickest crust matches the highest topography. At the Tremiti islands, in the Adriatic Sea, crustal thickness is 33 km. While our Moho depths beneath the Tyrrhenian side of the peninsula and the Adriatic Sea are in agreement with previous results, a new result of this study is the crustal thickening beneath the central Apennines. This leads to the conclusion that the central Apennine topography is supported by a significant crustal root.
    Description: Published
    Description: 425-435
    Description: JCR Journal
    Description: reserved
    Keywords: teleseismic receiver functions ; crustal thickness ; central Apennines ; Italy ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    Shear wave attenuation in the lithosphere beneath Italy and surrounding regions: Tectonic implications (2007)
    Agu
    Details
    Publication Date: 2017-04-04
    Description: More than 700 waveforms produced by 51 shallow earthquakes and recorded at regional distances (250-1400 km) by the Italian seismic network have been analyzed to characterize the amplitude and frequency contents of the crustal and uppermost mantle shear waves Lg and Sn, respectively. The crustal phase Lg efficiently propagates through the relatively stable Adriatic continental crust, while it is not observed along propagation paths crossing major physiographic features, like the Apennine chain and the basinal domain of the Tyrrhenian and Ionian Seas. Similar to Lg, efficient Sn propagation is observed in the uppermost mantle beneath the Po plain and the Adriatic Sea. Efficient Sn transmission is also observed across the northern Ionian Sea and Sicily and in the area between Sardinia and the northern coasts of Africa. Sn are efficiently transmitted across the Sicily Channel, and rather efficient Sn propagate beneath the Ligurian Sea. On the contrary, inefficient Sn transmission characterizes the uppermost mantle beneath the Apennines, the western margin of the Italian peninsula, and the southern Tyrrhenian Sea. Shear wave attenuation suggests the presence of asthenospheric material in the uppermost mantle, probably related to the present-day extension along the Apennine chain and in the Tyrrhenian basin. This interpretation is consistent with the presence of extensive Neogene and Quaternary volcanic activity in these areas and related high heat flow. Proposed lithospheric delamination processes beneath the Apennines and subduction beneath the Tyrrhenian Sea can reasonably explain the observed high-attenuation zones in the uppermost mantle. In contrast, a high-strength mantle lid is inferred to underlay the Po plain, the Adriatic Sea, and the northern Ionian Sea. The available waveforms also indicate that a continuous mantle lid is present beneath Sicily and the extensional domain of the Sicily Channel, as well as in the marine area south of Sardinia.
    Description: Published
    Description: 11,863-11,875
    Description: JCR Journal
    Description: open
    Keywords: Sn attenuation ; Italy ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Estimates of crustal thickness in central Italy from teleseismic receiver functions (2010)
    Details
    Publication Date: 2017-04-04
    Description: We have estimated Moho depths at 39 broadband, 3-component seismic stations installed in central Italy in an area of about 250 x 330 km2, using receiver functions computed from teleseismic events. Stations belong to the Italian Seismic Network that is operated by the Istituto Nazionale di Geofisica e Vulcanologia. In the study area we have found that Moho depth ranges from 24 to 44 km. The shallowest Moho is found along the western side of central Italy and is consistent with the thinned Tyrrhenian crustal domain. Larger crustal thickness characterizes the area of the Apennine mountain range, a Tertiary thrust-and-fold belt running from NW to SE along the whole length of the Italian peninsula. Crustal thickness of 30-32 km are estimated along the eastern margin of central Italy, where the Adriatic continental lithosphere represents the foreland of the E-verging Apennine chain. In this work we have reconstructed the Moho surface beneath central Italy after assigning each station to the different crustal domains (Tyrrhenian vs Adriatic/Apennine) on the basis of location, surface geology, available deep-well data.
    Description: Unpublished
    Description: Damascus, Syria
    Description: 3.3. Geodinamica e struttura dell'interno della Terra
    Description: open
    Keywords: Moho depth ; Italy ; 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
    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...