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
    Electronic Resource
    Electronic Resource
    Large amplification of ground motion at rock sites within a fault zone in Nocera Umbra (central Italy) (2000)
    Springer
    Journal of seismology 4 (2000), S. 543-554 
    Details
    ISSN: 1573-157X
    Keywords: fault zone ; ground motion ; Nocera Umbra ; site effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract During the two mainshocks of September 26, 1997 inthe Umbria-Marche border a strong-motion accelerographrecorded peak ground accelerations as large as 0.6 g,approximately, in the town of Nocera Umbra, atdistances of 10 to 15 km from the epicentres. Thisvalue is significantly larger than expected on thebasis of the usual regressions with magnitude anddistance. A broad-band amplification up to a factor of10 was consistently estimated in previous papers,using both weak and strong motion data recorded at theaccelerograph site during local moderate earthquakes.To study the cause of this amplification we deployedsix seismologic stations across the tectonic contactbetween the Ceno-Mesozoic limestone and the Mesozoicmarly sandstone where the accelerograph is installed.Seismograms of 21 shallow aftershocks in the magnituderange from 2.2 to 4.0 and a subcrustal Mw = 5.3event are analysed. Regardless of epicentre location,waveforms show a large complexity in an approximately200 m wide band adjacent to the tectonic contact. Thisis interpreted as the effect of trapped waves in thehighly fractured, lower velocity materials within thefault zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026559901378
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Foreland tectonics in the southern Adriatic Sea (2007)
    Details
    Publication Date: 2021-07-14
    Description: Two major deformation belts occur in the portion of the Adriatic Sea offshore the Gargano Promontory. The NE-SW - trending Tremiti Deformation Belt, located north of the Gargano Promontory, originated during the Plio- Quaternary, while the E-W-trending South Gargano Deformation Belt, located south of the Gargano Promontory, formed in a time span from Eocene to Early Pliocene. These deformation belts may have originated by tectonic inversion of Mesozoic extensional faults. This inversion tectonics, of Tertiary age, can be related to the evolution of the fold-and thrust belts surrounding the Adriatic Sea. The whole of the study area is, at present, seismically active and represents a preferential site of deformation.
    Description: Published
    Description: 573-578
    Description: open
    Keywords: southern Adriatic Sea ; foreland tectonics ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. 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)
  • 3
    facet.materialart.
    Unknown
    Foreland deformational pattern in the Southern Adriatic Sea (2007)
    Details
    Publication Date: 2021-07-14
    Description: Two major deformation belts occur in the portion of the Adriatic Sea offshore the Gargano Promontory. Although these two belts display similar characters on seismic profiles, they are different in other respects. The NE-SWtrending Tremiti Deformation Belt, located north of the Gargano Promontory, originated during the Plio-Quaternary, while the E-W-trending South Gargano Deformation Belt, located south of the Gargano Promontory, formed in a time span that goes from Eocene to early Pliocene. On the ground of structural and stratigrafic evidence these deformation belts are interpreted as originated by tectonic inversion of Mesozoic extensional faults. This inversion tectonics, of Tertiary age, can be related to the evolution of the fold-and-thrust belts that surround the Adriatic Sea. A moderate seismic activity, recorded around the Tremiti Island, and historical seismological data suggest that the whole of study area is, at present, seismically active. Therefore, this portion of the Adriatic block still represents a preferental site of deformation.
    Description: Published
    Description: 229-247
    Description: JCR Journal
    Description: open
    Keywords: southern Adriatic Sea ; foreland deformation ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. 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)
  • 4
    facet.materialart.
    Unknown
    Tettonica dell'Adriatico meridionale (2007)
    Details
    Publication Date: 2021-07-14
    Description: L'evoluzione tettonica delllAdriatico meridionale à stata studiata attraverso l'interpretazione di profili sismici a riflessione e l'analisi di pozzi per l'esplorazione. Durante il Mesozoico quest'area à stata interessata dal processo di rifting che ha portato all'apertura della Tetide. Questa tettonica estensionale ha generato un bacino pelagico epicontinentale bordato da piattaforme carbonatiche, il cui margine sud-occidentale à tracciabile con l'ausilio dei profili sismici. L'area di piattaforma e quella bacinale si comportano in maniera diversa quando coinvolte nell'orogenesi alpina. Nel Cenozoico l'Adriatico meridionale diventa un bacino di avanfossa legato alla catena Ellenico-Dinarica, il cui fronte à presente in prossimità della costa albanese. Lungo tale fronte, che à tuttora sismicamente attivo, sono presenti delle marcate differenze di stile strutturale che sembrano imputabili alla strutturazione mesozoica in piattaforma e bacino. Il bacino di avanfossa contiene sedimenti clastici oligocenico-quaternari e gli spessori massimi, fino a 8-10 km, si trovano al disopra delle aree bacinali mesozoiche. Nei pressi della costa pugliese e in particolare a sud del promontorio garganico, in posizione di avampaese rispetto alla catena albanese, si osservano strutture plicative legate a faglie inverse. Si ritiene che tali strutture, di età eocenica- pliocenica inferiore, siano dovute alla propagazione in avampaese di sforzi compressivi originatisi nelle zone di catena.
    Description: Published
    Description: 227-237
    Description: open
    Keywords: Adriatico meridionale ; sismica a riflessione ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. 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
    Seismotectonic identity of the southern Adriatic area (2007)
    Details
    Publication Date: 2017-04-04
    Description: The Adriatic microplate is considered in literature as a block relatively undeformed and aseismic with unitary dynamical behaviour. Nevertheless suchmodel is inadequate to justify the recent seismicity of the Adriatic basin. Recent mesostructural analyses are showing a continuous strain boundary all around the Southern Adriatic platform. Several structures were recognized continuously outcropping from the Southern Dalmatian coastline (Kotor zone) to Split- Sibenik area and, across the Adriatic isles, until the Tremiti Islands and the Gargano-Murge regions. Data point out a centripetal trend of the Dinaric and Apenninic units, delimited to the north by ductile and brittle strain belts. These belts seem to set apart the southern block and to allow the release from the northern structures. The agreement between the geological-structural and seismological data allows to identify the Southern Adriatic block as an indipendent crustal structure, divided from the northern one by strike-slip faults. The Southern Adriatic block is able to condition the structural evolution of the neighbouring areas.
    Description: Published
    Description: Siena, Italia
    Description: open
    Keywords: Adriatic Sea ; seismotectonics ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Suboceanic Rayleigh Waves in the 1755 Lisbon Earthquake (2010)
    Springer
    Details
    Publication Date: 2017-04-04
    Description: Moderate-magnitude shallow earthquakes in the Atlantic Ocean, hundreds of kilometres southwest of Lisbon, can generate efficient suboceanic Rayleigh waves (SRW) that are well recorded in Portugal. Here we compare moderate-size earthquakes recorded by seismic stations in Portugal with the Tyrrhenian Sea earthquakes recorded in peninsular Italy where SRW were recently observed. In spite of a different behaviour of high frequencies due to the different tectonic setting of the two areas, similar results are found in the intermediate-period range, suggesting that this effect, if extrapolated to a magnitude larger than 8, could be devastating at regional distance in terms of ground motion amplitude and duration. Through 1D models, we explore the hypothesis that the high level of destruction and the long duration of shaking felt during the Great 1755 Lisbon earthquake were caused by SRW. In this preliminary study, we check the role of critical model parameters. We find that duration and amplitude are largest when the average thickness of the water layer is 2 km and shear-wave velocity of the ocean floor is close to the speed of sound in the water. Both conditions are realistic for a source in the Atlantic Ocean, few hundreds of kilometres southwest of Lisbon. Moreover, the propagation of SRW at regional distances accounts for durations of more than ten minutes as the effect of a single large earthquake.
    Description: Published
    Description: 283-295
    Description: 4.1. Metodologie sismologiche per l'ingegneria sismica
    Description: open
    Keywords: ground motion ; surface waves ; 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
    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...