Geological, seismological and geodetic evidence of active thrusting and folding south of Mt. Etna (eastern Sicily): Revaluation of “seismic efficiency” of the Sicilian Basal Thrust

Guidi, Giorgio De; Barberi, G.; Barreca, Giovanni; Bruno, Valentina; Cultrera, Fabrizio; Grassi, Sabrina; Imposa, Sebastiano; Mattia, M.; Monaco, Carmelo; Scarfì, L.; Scudero, Salvatore

doi:10.1016/j.jog.2015.06.001

Cited by 34 publications

(44 citation statements)

References 47 publications

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“…This is characterized by maximum uplift rate of about 10 mm/year along the hinge zone, and has been attributed either to gravitational spreading of the volcanic edifice (Catania anticline, Fig. 1, Lundgren et al, 2004;Bonforte et al, 2011) or to tectonic convergence (De Guidi et al, 2013). At the same time, InSar data also revealed that the west and north base of Mt.…”

Section: Stratigraphic and Structural Frameworkmentioning

confidence: 95%

“…1) deposited on the flexured margin of the foreland Pelagian block (Branca et al, 2011a). This succession is currently deformed by detachment folds related to the recent frontal migration of the thrust belt, as a response to the approximately N-S compressive regional tectonic regime (Bousquet et al, 1987;Labaume et al, 1990;Monaco et al, 1997;Bousquet and Lanzafame, 2004;De Guidi et al, 2013). Since the Middle Pleistocene, contractional structures of the orogen have been coupled with oblique extensional faults along the Ionian offshore.…”

Section: Stratigraphic and Structural Frameworkmentioning

confidence: 99%

“…Etna edifice, so contractional structures south of Mt. Etna can be interpreted as the detachment response of a shallow thrust migrating within the foredeep deposits at the chain front (Bousquet et al, 1987;Labaume et al, 1990;Monaco et al, 1997;Bousquet and Lanzafame, 2004;De Guidi et al, 2013).…”

Section: Stratigraphic and Structural Frameworkmentioning

confidence: 99%

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Holocene vertical deformation along the coastal sector of Mt. Etna volcano (eastern Sicily, Italy): Implications on the time–space constrains of the volcano lateral sliding

Branca¹,

Guidi²,

Lanzafame³

et al. 2014

Journal of Geodynamics

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Section: Stratigraphic and Structural Frameworkmentioning

confidence: 95%

Section: Stratigraphic and Structural Frameworkmentioning

confidence: 99%

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Holocene vertical deformation along the coastal sector of Mt. Etna volcano (eastern Sicily, Italy): Implications on the time–space constrains of the volcano lateral sliding

Branca¹,

Guidi²,

Lanzafame³

et al. 2014

Journal of Geodynamics

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“…Focal mechanisms indicate a purely reverse mechanism with a NNW-SSE oriented P axis (Billi,et al, 2007;Pondrelli et al, 2006). Geodetic, seismological and geological data (Monaco et al, 1996;Lavecchia et al, 2007;Barreca et al, 2014a;De Guidi et al, 2015) indicate that Nubia-Eurasia convergence is also accommodated by active thrusting and folding across the Sicily chain front (up to 4.5 mm/yr of geodetic shortening).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The Ionian and Alfeo–Etna fault zones: New segments of an evolving plate boundary in the central Mediterranean Sea?

et al. 2016

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“…It should be noted that this seismicity is strictly related with the continuous fault activity and volcanotectonic dynamics as a whole Solaro et al, 2010). Conversely, seismicity occurring at deeper crustal levels mainly represents purely tectonic regional dynamics due to the current compressive regime at the front of the Sicilian Chain-Foreland (Lavecchia et al, 2007;De Guidi et al, 2015;Scarfì et al, 2016). The most significant seismogenic volume in the deep crust beneath Etna is the one in the northwestern sector of the volcano, with focal depths in the range of 22-30 km.…”

Section: Introductionmentioning

confidence: 95%

When probabilistic seismic hazard climbs volcanoes: the Mt. Etna case, Italy – Part 1: Model components for sources parameterization

Azzaro

Barberi

D’Amico

et al. 2017

Nat. Hazards Earth Syst. Sci.

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Abstract. The volcanic region of Mt. Etna (Sicily, Italy) represents a perfect lab for testing innovative approaches to seismic hazard assessment. This is largely due to the long record of historical and recent observations of seismic and tectonic phenomena, the high quality of various geophysical monitoring and particularly the rapid geodynamics clearly demonstrate some seismotectonic processes. We present here the model components and the procedures adopted for defining seismic sources to be used in a new generation of probabilistic seismic hazard assessment (PSHA), the first results and maps of which are presented in a companion paper, . The sources include, with increasing complexity, seismic zones, individual faults and gridded point sources that are obtained by integrating geological field data with long and short earthquake datasets (the historical macroseismic catalogue, which covers about 3 centuries, and a highquality instrumental location database for the last decades). The analysis of the frequency-magnitude distribution identifies two main fault systems within the volcanic complex featuring different seismic rates that are controlled essentially by volcano-tectonic processes. We discuss the variability of the mean occurrence times of major earthquakes along the main Etnean faults by using an historical approach and a purely geologic method. We derive a magnitude-size scaling relationship specifically for this volcanic area, which has been implemented into a recently developed software toolFiSH (Pace et al., 2016) -that we use to calculate the characteristic magnitudes and the related mean recurrence times expected for each fault. Results suggest that for the Mt. Etna area, the traditional assumptions of uniform and Poissonian seismicity can be relaxed; a time-dependent fault-based modeling, joined with a 3-D imaging of volcano-tectonic sources depicted by the recent instrumental seismicity, can therefore be implemented in PSHA maps. They can be relevant for the retrofitting of the existing building stock and for driving risk reduction interventions. These analyses do not account for regional M > 6 seismogenic sources which dominate the hazard over long return times (≥ 500 years).

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Geological, seismological and geodetic evidence of active thrusting and folding south of Mt. Etna (eastern Sicily): Revaluation of “seismic efficiency” of the Sicilian Basal Thrust

Cited by 34 publications

References 47 publications

Holocene vertical deformation along the coastal sector of Mt. Etna volcano (eastern Sicily, Italy): Implications on the time–space constrains of the volcano lateral sliding

Holocene vertical deformation along the coastal sector of Mt. Etna volcano (eastern Sicily, Italy): Implications on the time–space constrains of the volcano lateral sliding

The Ionian and Alfeo–Etna fault zones: New segments of an evolving plate boundary in the central Mediterranean Sea?

When probabilistic seismic hazard climbs volcanoes: the Mt. Etna case, Italy – Part 1: Model components for sources parameterization

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