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  • 1
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    New constraints on the seismic history of the Castrovillari fault in the Pollino gap (Calabria, southern Italy) (2005)
    Kluwer Academic Publishers
    Details
    Publication Date: 2017-04-03
    Description: The Pollino Range area represents the most prominent gap in seismicity within the southern Apennines. Geomorphic and trenching investigations along the Castrovillari fault indicate that this normal fault is a major seismogenic fault within the southern part of this gap. At least four surface-faulting earthquakes have occurred on this fault since late Pleistocene age. Radiocarbon dating coupled with historical consideration set the time of the most recent earthquake as most likely to be between 530 A.D. and 900 A.D., with the possible widest interval of 530–1100 A.D. No evidence for this event has been found in the historical records, although its age interval falls within the time spanned by the seismic catalogues. Slip per event ranges between 0.5 and 1.6 m, with a minimum rupture length of 13 km. These values suggest a M 6.5–7.0 for the paleoearthquakes. The minimum long-term vertical slip rate obtained from displaced geomorphic features is of 0.2–0.5 mm/yr. A vertical slip-rate of about 1 mm/yr is also inferred from trenching data. The inter-event interval obtained from trench data ranges between 940 and 7760 years (with the young part of the interval possibly more representative; roughly 940–3000 years). The time elapsed since the most recent earthquake ranges between a minimum of 900–1100 and a maximum of 1470 years. The seismic behavior of this fault appears to be consistent with that of other major seismogenic faults of the central-southern Apennines. The Pollino case highlights the fact that geological investigations represent a potentially useful technique to characterize the seismic hazard of ‘silent’ areas for which adequate historical and seismological data record are not available.
    Description: Published
    Description: 199-217
    Description: N/A or not JCR
    Description: reserved
    Keywords: seismic fault behavior ; seismic gap ; seismogenic fault ; southern Italy ; surface faulting ; paleoearthquakes ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 1048890 bytes
    Format: application/pdf
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  • 2
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    Investigation of the active Celano–L’Aquila fault system, Abruzzi (2007)
    Blackwell publishing
    Details
    Publication Date: 2017-04-03
    Description: We studied fault scarps along the northern sector of the Celano–L’Aquila fault system in the Abruzzi region (central Apennines). Up to ∼9.5 km long, 3 m high, fault scarp traces mark the slope foot of ridgetop valleys at Mt Ocre range. In order to provide direct evidence of the deformation history of these scarps, we initiated geomorphic, ground-penetrating radar (GPR)and trenching investigations. GPR investigations yielded subsurface stratigraphic features of the scarp zones, and determined the locations for trenching sites. A total of five trenches were excavated at two different sites. Structural and stratigraphic analysis of the trench exposures combined with historical considerations, showed three faulting events between 5620 BC and 1300 AD; the most recent of them occurred after 1690 BC. Each of these events produced an estimated minimum vertical displacement ranging between 0.3 and 0.5 m. Our interpretation is that the Mt Ocre fault branch represents the northernmost surface expression of a single 35 km long seismogenic structure associated with M ∼7 earthquakes. Any attempt to estimate the seismic hazard in the area must consider the presence of this important source.
    Description: Published
    Description: 805–818
    Description: 3.2. Tettonica attiva
    Description: JCR Journal
    Description: reserved
    Keywords: active tectonics ; central Italy ; earthquakes ; electromagnetic surveys ; palaeoseismology ; 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods ; 04. Solid Earth::04.02. Exploration geophysics::04.02.05. Downhole, radioactivity, remote sensing, and other methods ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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