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  • 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous  (3)
  • 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques  (3)
  • Earthquake catalog
  • ddc:550
  • TF III
  • 1
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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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  • 2
    Publication Date: 2006
    Keywords: TF III ; Task Force III ; Lithosphere-Astenosphere Interactions
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  • 3
    Publication Date: 2006
    Keywords: TF III ; Task Force III ; Lithosphere-Astenosphere Interactions
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  • 4
    Publication Date: 2006
    Keywords: TF III ; Task Force III ; Lithosphere-Astenosphere Interactions
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  • 5
    Publication Date: 2017-04-04
    Description: Abstract. Teleseismic data recorded by temporary and permanent stations located in the Northern Victoria Land region are analysed in order to identify the presence and location of seismic anisotropy. We work on data recorded by 24 temporary seismographic stations deployed between 1993 and 2000 in different zones of the Northern Victoria Land, and by the permanent very broad-band stations TNV located near the Italian Base M. Zucchelli. The temporary networks monitored an area extending from Terra Nova Bay towards the South beyond the David Glacier and up to the Indian Ocean northward. To better constrain our study, we also provide an analysis of data recorded by TNV in the same period of time and we take into account also SKS shear wave splitting measurements performed by Barruol and Hoffman (1999) on data recorded by DRV. This study, to be considered as preliminary, reveals the presence of seismic anisotropy below the study region, with a mainly NW-SE fast velocity direction below the Terra Nova Bay area and rather large delay times, that mean a deep rooted anisotropic layer.
    Description: Published
    Description: 153-160
    Description: open
    Keywords: Seismic anisotropy ; Antarctica ; 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
    Format: 783740 bytes
    Format: application/pdf
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  • 6
    Publication Date: 2017-04-04
    Description: The project Retreating-trench, extension, and accretion tectonics, RETREAT, is a multidisciplinary study of the Northern Apennines (www.geology.yale.edu/RETREAT/index.htm), is funded by the United States National Science Foundation (NSF) in collaboration with the Italian Istituto Nazionale di Geofisica e Vulcanologia (INGV) and the Grant Agency of the Czech Academy of Sciences (GAAV). The main goal of RETREAT is to develop a self-consistent dynamic model of syn-convergent extension, using the Northern Apennines as a natural laboratory. In the context of this project a passive seismological experiment was deployed in the fall of 2003 for a period of three years. RETREAT seismologists aim to develop a comprehensive understanding of the deep structure beneath the Northern Apennines, with particular attention on inferring likely patterns of mantle flow. Specific objectives of the project are the crustal and lithospheric thicknesses, the location and geometry of the Adriatic slab, and the distribution of seismic anisotropy laterally and vertically in the lithosphere and asthenosphere. The project is collecting teleseismic and regional earthquake data for 3 years. This contribution describes the RETREAT seismic deployment and reports on key results from the first year of the deployment. We confirm some prior findings regarding the seismic structure of central Italy, but our observations also highlight the complexity of the Northern Apennines subduction system.
    Description: Submitted
    Description: open
    Keywords: Apennines: ; Seismic ; 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: manuscript
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  • 7
    Publication Date: 2017-04-04
    Description: We present shear-wave splitting results obtained from analysis of core refracted teleseismic phases recorded by permanent and temporary seismographic stations located in the Victoria Land region (Antarctica). We used eigenvalue technique to linearize the rotated and shifted shear-wave particle motion, in order to determine the best splitting parameters. A well-scattered distribution of single shear-wave measurements has been obtained. Average values show clearly that dominant fast axis direction is NE-SW oriented, accordingly with previous measurements obtained around this zone. Only two stations, OHG and STAR show different orientations, with N-S and NNW-SSE main directions. On the basis of the periodicity of single shear-wave splitting measurements with respect to back-azimuths of events under study, we inferred the presence of lateral and vertical changes in the deep anisotropy direction. To test this hypothesis we have modelling waveforms using a cross-convolution technique in one and two anisotropic layer's cases. We obtained a significant improvement on the misfit in the double layer case for the cited couple of stations. For stations where a multi-layer structure does not fit, we looked for evidences of lateral anisotropy changes at depth through Fresnel zone computation. As expected, we find that anisotropy beneath the Transantarctic Mountains (TAM) is considerably different from that beneath the Ross Sea. This feature influences the measurement distribution for the two permanent stations TNV and VNDA. Our results show a dominant NE-SW direction over the entire region, but other anisotropy directions are present and find an interpretation when examined in the context of regional tectonics.
    Description: Submitted
    Description: 3.3. Geodinamica e struttura dell'interno della Terra
    Description: N/A or not JCR
    Description: open
    Keywords: Antarctica ; Seismic Anisotropy ; 04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy ; 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques ; 04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: manuscript
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  • 8
    Publication Date: 2020-02-24
    Description: Nell’ambito della convenzione vigente tra l’Istituto Nazionale di Geofisica e Vulcanologia (INGV) e l’Agenzia di Protezione Civile della Regione Emilia Romagna è stata realizzata a fine settembre del 2011 una esercitazione sul rischio sismico con l’obiettivo di valutare il livello raggiunto nelle procedure che entrambi gli Enti attivano in occasione di una emergenza a seguito di un forte terremoto. La simulazione ha interessato oltre 50 unità di personale INGV, sia in sede che in area epicentrale, appartenenti a diverse Sezioni e sedi INGV (Ancona, Arezzo, Bologna, Irpinia, Milano, Pisa e Roma). La preparazione dell’evento si è fondata sulle esperienze del passato, in primis la lunga emergenza aquilana del 2009 [Margheriti et al., 2010; 2011; Moretti et al., 2011c], con uno sguardo alle nuove esigenze sia interne che esterne (ad esempio le istanze della Protezione Civile). Nonostante gli imprevisti e gli inevitabili errori commessi a cui si aggiunga lo sforzo per mettere insieme tante differenti professionalità e per rispettare sempre al meglio il programma e gli impegni presi con i responsabili dell’Agenzia di Protezione Civile della Regione Emilia Romagna, è stato ampiamente ripagato dall’aver vissuto un’esperienza positiva non solo da un punto di vista professionale ma anche umano. Questa esercitazione si è infatti rivelata un’importante occasione per relazionarsi e confrontarsi con i colleghi solitamente lontani rendendosi conto che da ciascuno di loro è sempre possibile imparare qualcosa. Questa esperienza si è mostrata di fondamentale importanza nella gestione dell’emergenza verificatasi a maggio 2012 in Pianura Padana emiliana [Moretti et al., 2012].
    Description: Published
    Description: 1-27
    Description: 1.1. TTC - Monitoraggio sismico del territorio nazionale
    Description: N/A or not JCR
    Description: open
    Keywords: Seismic monitoring ; Exercise of civil protection ; 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring ; 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 9
    Publication Date: 2017-04-04
    Description: We present shear-wave splitting results obtained from the analysis of core refracted teleseismic phases recorded by permanent and temporary seismographic stations located in the Victoria Land region (Antarctica). We use an eigenvalue technique to isolate the rotated and shifted shear-wave particle motion, in order to determine the best splitting parameters. Average values show clearly that dominant fast axis direction is NE-SW oriented, in accordance with previous measurements obtained around this zone. Only two stations, OHG and STAR show different orientations, with N-S and NNW-SSE main directions. On the basis of the periodicity of single shear-wave splitting measurements with respect to back-azimuths of events under study, we infer the presence of lateral and vertical changes in the deep anisotropy direction. To test this hypothesis we model waveforms using a cross-convolution technique for the cases of one and two anisotropic layers. We obtain a significant improvement on the misfit in the double layer case for the two stations. For stations where a multi-layer structure does not fit, we investigate lateral anisotropy changes at depth through Fresnel zone computation. We find that anisotropy beneath the Transantarctic Mountains (TAM) is considerably different from that beneath the Ross Sea. This feature influences the measurement distribution for the two permanent stations TNV and VNDA. Our results show a dominant NE-SW direction over the entire region, but other anisotropy directions are present and maybe interpreted in the context of regional tectonics.
    Description: Published
    Description: 421-432
    Description: 3.3. Geodinamica e struttura dell'interno della Terra
    Description: JCR Journal
    Description: open
    Keywords: Mantle Processes ; Seismic anisotorpy ; 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 10
    Publication Date: 2017-04-04
    Description: Istituto Nazionale di Geofisica
    Description: Published
    Description: open
    Keywords: Northern Italy ; Temporary networks ; Active Tectonics ; 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: report
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