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The resolution of geological analysis and models for earthquake faulting studies
No full textSee the preface of the volum
Strutture sismogenetiche in Appennino Centrale: potenziale sismico, analisi frattale e processi di crescita
No full textThe seismogenic structures of the axial zones of the Central Apennines Fault System have been recognized by means of detailed analyses of the capable faults exposed along a main deformation zone extending from Camerino to L'Aquila. The fault system also includes lower-rank faults, trending roughly NW-SE and N-S, showing normal and strike-slip components, respectively. Expected maximum magnitudes associated with normal and/or transtensional fault segments are lower than 6.0, whereas those expected from the activation of strike-slip faults may be high as 7.0. The results obtained from our study suggest that seismic activity in the area in mainly due to the development and evolution of a N-S trending strike-slip system composed of 3 main structures, each of which characterized by a surface fault pattern with specific fractal properties. The central structure of the system was interpreted to be the major seismogenic structure in the area and is thought to be responsible for the 1703 seismic sequence in Central Italy
Geo-structural evidence for active oblique extension in south-central Italy
No full textActive tectonic processes in south-central Italy have been analyzed by means of spatial and kinematic analysis of fault zones In (i) the axial zones of the Apenninic mountain chain, where most of the seismic strain is released within intramontane basin areas (i.e., Norcia, Fucino, Vallo di Diane, high Agri Valley, etc.); and (ii) in the Gargano promontory, where earthquakes with magnitudes up to 6 and 7 have Occurred. Our work focuses on a better understanding of the most recent deformation processes acting in these areas, and the relative motion between the Adriatic and Tyrrhenian crustal units. In order to derive the information above, we integrated structural and seismological data from the Apennines and the Gargano area. The results of our analysis show that the style of active deformation in both of these areas is broadly consistent with the current stress field. Kinematic data from slip indicators on active fault planes are, in fact, consistent with the geometric proprieties and spatial arrangement of the various fault segments and indicate that most of the active structures are characterized by oblique motion. The overall direction of extension appears to be at fairly high angle to the trend of the Apennines, with a component of horizontal left-lateral motion between Tyrrhenia and Adria
Can we assess earthquake size by measuring the fractal dimension of active faults?
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Evoluzione tettonica Plio-Quaternaria dell'area reatina: implicazioni per possibili scenari di pericolosità da terremoto.
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Evidenze di processi deformativi continui e tettonica trascorrente nel Cnale di Sicilia: le Isole Maltesi.
No full textIn this paper we report the results of a study concerning the macro and meso-structures affecting the oligo-miocene succession and a few quaternary deposits
outcropping in the maltese islands. Data analysis allowed us to define in detail the geo-structural setting of the
study area and to put in evidence the mode of deformation responsible for its generation. The main conclusions that can be drawn indicate that the area in question has been affected by a progressive deformative
process during which it is possible to isolate a series of
tectonic events that are characterized by different geometries of the stress field. The above information
together with available data relative to the surrounding
regions (Tunisia, Pelagian block and Pantelleria) also
made it possible to discuss in detail the temporal relations among the deformative events with the aim of obtaining a better understanding of the neotectonic evolution of the whole sector located between the undeformed african continental margin and the Sicilian maghrebide chain
Analisi frattale di insiemi di faglie tardo-quaternarie in Appennino centrale.
No full textL’analisi statistica frattale relativa alle faglie del CAFS (The Central Apennines Fault System), è stata effettuata allo scopo di valutare il grado di maturità dell’insieme di faglie tardo-quaternarie dell’Appennino umbro-marchigiano-abruzzese e per investigare la possibile esistenza di eventuali fattori di scala che governano lo sviluppo di strutture di rango differente. Vengono, inoltre, discusse alcune implicazioni di tipo sismotettonico
Fluid inclusions in high pressure/low temperature rocks from the Calabrian Arc (Southern Italy): the burial and exhumation history of the subduction-related Diamante-Terranova unit
No full textExperimental reflection seismic study in the Norcia and Gargano areas (Central-Southern Italy).
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