From surface geology to aftershock analysis : Constraints on the geometry of the L’Aquila 2009 seismogenic fault system

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Description :
The aim of this study is the definition of the geometry and structural style of the extensional fault system involved during the L’Aquila 2009 seismic sequence. The surface tectonic setting of the late Quaternary faults in the epicentral areas (i.e., the Paganica, Mt. Gorzano and Montereale faults in northwestern Abruzzo) was defined by integrating data from the literature with original field work. Consistent geometric and kinematic correlations between the geological and seismological data were observed. The seismic sequence reactivated 4 well-distinguished fault sources differing in geometry, size and the degree of involvement. The L’Aquila 2009 seismic sequence did not reactivate the entire surface of the involved faults. Nevertheless, on the basis of other geological and seismological constraints, the overall fault extent is schematically reconstructed and parameterised. Some considerations related to the structural style of the intra-Apennine Quaternary extensional structures and their patterns at depth are advanced. - (NF)

Type de document :
Article de périodique

Source :
Italian Journal of Geosciences (Testo stampato), issn : 2038-1719, 2012, vol. 131, n°. 3, p. 330-347, nombre de pages : 18, Références bibliographiques : 2 p.

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Pays édition : Italie, Roma, Società Geologica Italiana

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