Bulletin of the Seismological Society of America, Aug 1, 2011
This paper documents evidence of surface faulting associated with the 6 April 2009 moderate-sized... more This paper documents evidence of surface faulting associated with the 6 April 2009 moderate-sized earthquake (ML 5.8, M w 6.3) in the central Apennines of Italy, which caused major damage to the town of L'Aquila and its surroundings. Coseismic surface ruptures were mapped for a minimum distance of 2.6 km along the Paganica fault, a fault still poorly investigated relative to the other active faults nearby, which bound much wider range fronts. Surface rupture length (SRL) and maximum displacement parameters (2.6 km minimum ...
subaerial volume of about 5·106 m3. This landslide produced a tsunami wave responsible for more t... more subaerial volume of about 5·106 m3. This landslide produced a tsunami wave responsible for more than 1500 human life losses near Marina Grande beach. A geomechanical characterization of both the intact rock and the rock mass outcropping in the landslide slope was performed in order to obtain an engineering-geology model of the landslide according to an equivalent-continuum approach. Dynamic numerical modelling by FDM code FLAC 6.0 was performed to back-analyse the landslide occurrence during the 1783 seismic sequence. At this aim reference synthetic accelerometric ground motions were derived from strong motion records, taking into account both source and energy features of the 5th an 6th February mainshocks and local expected response spectra. In order to force the numerical model, levelled-energy multifrequencial equivalent signals were obtained from these reference records by experiencing the new LEMA_DES approach. The results of modelling show a post-seismic trigger of the rock-a...
Referenti: Eliana Esposito, Ricercatore (Monitoraggio faglie attive) Sabina Porfido, Ricercatore ... more Referenti: Eliana Esposito, Ricercatore (Monitoraggio faglie attive) Sabina Porfido, Ricercatore (Valutazione effetti sismoindotti mediante l' ESI scale 2007) Crescenzo Violante, Tecnologo (Rilievi di dettaglio-batimetria Lago Sinizzo) SINTESI DELL'ATTIVITÀ SVOLTA : STUDIO DEGLI EFFETTI SISMOINDOTTI L'unità operativa dell' IAMC ha effettuato il rilevamento degli effetti geologici sismoindotti per la valutazione dell'Intensità della sequenza sismica aquilana. L'attribuzione del grado di intensità è stato effettuato mediante l'uso della nuova scala macrosismica "ESI scale 2007" (Michetti et al., 2007), basata esclusivamente sugli effetti indotti sull'ambiente fisico dal terremoto, siano essi di natura primaria, come le faglie, e/o di natura secondaria, come i fenomeni franosi, di fratturazione, di liquefazioni, nonché variazioni idrologiche. In particolare l' IAMC e l' IRPI, in collaborazione con altri enti di ricerca nazionali ed inte...
Bulletin of the Seismological Society of America, Aug 1, 2011
This paper documents evidence of surface faulting associated with the 6 April 2009 moderate-sized... more This paper documents evidence of surface faulting associated with the 6 April 2009 moderate-sized earthquake (ML 5.8, M w 6.3) in the central Apennines of Italy, which caused major damage to the town of L'Aquila and its surroundings. Coseismic surface ruptures were mapped for a minimum distance of 2.6 km along the Paganica fault, a fault still poorly investigated relative to the other active faults nearby, which bound much wider range fronts. Surface rupture length (SRL) and maximum displacement parameters (2.6 km minimum ...
subaerial volume of about 5·106 m3. This landslide produced a tsunami wave responsible for more t... more subaerial volume of about 5·106 m3. This landslide produced a tsunami wave responsible for more than 1500 human life losses near Marina Grande beach. A geomechanical characterization of both the intact rock and the rock mass outcropping in the landslide slope was performed in order to obtain an engineering-geology model of the landslide according to an equivalent-continuum approach. Dynamic numerical modelling by FDM code FLAC 6.0 was performed to back-analyse the landslide occurrence during the 1783 seismic sequence. At this aim reference synthetic accelerometric ground motions were derived from strong motion records, taking into account both source and energy features of the 5th an 6th February mainshocks and local expected response spectra. In order to force the numerical model, levelled-energy multifrequencial equivalent signals were obtained from these reference records by experiencing the new LEMA_DES approach. The results of modelling show a post-seismic trigger of the rock-a...
Referenti: Eliana Esposito, Ricercatore (Monitoraggio faglie attive) Sabina Porfido, Ricercatore ... more Referenti: Eliana Esposito, Ricercatore (Monitoraggio faglie attive) Sabina Porfido, Ricercatore (Valutazione effetti sismoindotti mediante l' ESI scale 2007) Crescenzo Violante, Tecnologo (Rilievi di dettaglio-batimetria Lago Sinizzo) SINTESI DELL'ATTIVITÀ SVOLTA : STUDIO DEGLI EFFETTI SISMOINDOTTI L'unità operativa dell' IAMC ha effettuato il rilevamento degli effetti geologici sismoindotti per la valutazione dell'Intensità della sequenza sismica aquilana. L'attribuzione del grado di intensità è stato effettuato mediante l'uso della nuova scala macrosismica "ESI scale 2007" (Michetti et al., 2007), basata esclusivamente sugli effetti indotti sull'ambiente fisico dal terremoto, siano essi di natura primaria, come le faglie, e/o di natura secondaria, come i fenomeni franosi, di fratturazione, di liquefazioni, nonché variazioni idrologiche. In particolare l' IAMC e l' IRPI, in collaborazione con altri enti di ricerca nazionali ed inte...
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