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  • 1
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    In:  J. Geophys. Res., Edmonton, Conseil de l'Europe, vol. 104, no. B11, pp. 25,595-25,610, pp. B10404, (ISSN: 1340-4202)
    Publication Date: 1999
    Keywords: Stress ; Fault plane solution, focal mechanism ; Borehole breakouts ; 8164 ; Tectonophysics ; Stresses--crust ; and ; lithosphere ; 7230 ; Seismology ; Seismicity ; and ; seismotectonics ; 1744 ; History ; of ; geophysics ; JGR ; Tectonophysics ; 9335 ; Information ; related ; to ; geographic ; region ; Europe
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  • 2
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    In:  Phys. Earth Plan. Int., Stockholm, Wissenschaftliche Buchgesellschaft, vol. 130, no. 1-2, pp. 71-101, pp. L15318, (ISSN: 1340-4202)
    Publication Date: 2002
    Keywords: Earthquake catalog ; Moment tensor ; Fault plane solution, focal mechanism ; PEPI ; Ekstroem ; Ekstrom ; Dziewonski
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  • 3
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    In:  Geophysical Journal International, Basle, Wiley, vol. 156, no. 2, pp. 297-306, pp. B09404, (ISSN: 1340-4202)
    Publication Date: 2004
    Keywords: Seismicity ; Stress ; Italy ; Fault plane solution, focal mechanism ; GJI ; fault-plane ; solution, ; stress ; distribution
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  • 4
    Publication Date: 2017-04-04
    Description: We document quantitatively observations of quasi-Love waves obtained at permanent (Italian National Seismic Network) and temporary seismic stations deployed in Italy between 2003 and 2006 (Retreat, CAT/SCAN projects). We analyzed large earthquakes with source parameters that favor quasi-Love wave generation within this time-span, including the Sumatra–Andaman earthquake of 12/26/04. The presence or the absence of the quasi-Love phase is compared to the smoothed anisotropic pattern defined by the numerous SKS splitting measurements obtained in peninsular Italy, and to the Italian upper mantle structure as defined by seismic tomography. The large-scale anisotropic features, responsible for shear-wave splitting and documented also by Pn and surface-wave anisotropy, generally display the correct geometry to explain the scattered quasi-Love waves. Quasi-Love observations do not demand a tilted-axis anisotropic geometry. We argue instead for anisotropy with laterally-variable horizontal symmetry axis in the upper mantle below the Italian peninsula.
    Description: Published
    Description: 26-38
    Description: 1T. Geodinamica e interno della Terra
    Description: JCR Journal
    Description: restricted
    Keywords: Seismic anisotropy ; Quasi-Love ; Italy ; 04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes ; 04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy ; 04. Solid Earth::04.07. Tectonophysics::04.07.06. Subduction related processes
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Publication Date: 2019-11-04
    Description: In this paper we present a review of the seismotectonic features (an analysis of earthquake focal mechanisms and the distribution of seismicity) of the Northern Apennines, Umbria Region (Italy) in the area between Sansepolcro and Norcia. For this analysis, we used Centroid Moment Tensor (CMT) data for earthquakes with magnitude M〉5.0 and data computed by implementing the standard CMT algorithm to compute Regional Centroid Moment Tensor (RCMT) estimates for moderate-magnitude earthquakes (4.5〈M〈5.5), integrating pre-existing datasets. We used first-motion polarities to obtain fault-plane solutions for small earthquakes (2.5〈Md〈4.5) recorded by the seismic network deployed by the Istituto Nazionale di Geofisica e Vulcanologia. We analyzed the main features of the seismicity and the present-day tectonic regime in order to relate the seismicity patterns to seismogenic structures beneath Central Italy. In particular, we discuss the important role of a major low-angle normal fault, the Altotiberina Fault, in controlling crustal seismicity in this region.
    Description: JCR Journal
    Description: open
    Keywords: fault-plane solution ; seismicity ; seismotectonic ; Italy ; 04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 3049410 bytes
    Format: application/pdf
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