A new view of Italian seismicity using 20 years of instrumental recordings

Chiarabba, C.; Jovane, Luigi; Stefano, Raffaele Di

doi:10.1016/j.tecto.2004.09.013

Cited by 436 publications

(386 citation statements)

References 37 publications

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“…Equation (1) furnishes aṀ g 0 estimate of 76.9 ± 15.6 × 10 16 Nm/yr. I use a homogeneous value of H s = 10±2.5 km which include the ipocentrals depth of instrumentally recorded M > 5 earthquakes [Chiarabba et al, 2005].…”

Section: Gps Velocity and Strain Rate Fieldmentioning

confidence: 99%

Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy)

D’Agostino

2014

Geophysical Research Letters

126

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Here I compare estimates of tectonic strain rates from dense Global Positioning System measurements with the seismicity released in the last ~500 years in the Apennines (Italy). The rates of seismic moment accumulation from geodesy and of historical seismic release by earthquakes agree within the uncertainties, ruling out significant aseismic deformation. Within the considered 400 km long section of the Apennines, this balance yields an average recurrence interval of 30–75 years for MW≥6.5 events without requiring a future earthquake larger than those observed historically (MW~7). A minimum estimate of unreleased strain allows MW≥6.5 and MW≥6.9 events to be released in ~35% and ~10% of the central‐southern Apennines, respectively. The definition of the seismic potential for smaller events is more uncertain, and their occurrence remains a significant threat throughout the Apennines.

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Section: Gps Velocity and Strain Rate Fieldmentioning

confidence: 99%

Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy)

D’Agostino

2014

Geophysical Research Letters

126

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“…The south-eastern region of Sicily is currently the site of significant seismic activity that has been recorded in recent instrumental catalogues (Chiarabba et al, 2005;Musumeci et al, 2005) and historical chronicles (Boschi et al, 1995a and b). In particular, it has been affected by large historical earthquakes, one of which, the 11 January 1693 earthquake, has been considered as the largest earthquake in the history of Italy (M w = 7.4; CPTI Working Group, 2004).…”

Section: Introductionmentioning

confidence: 99%

Active tectonics along the submarine slope of south-eastern Sicily and the source of the 11 January 1693 earthquake and tsunami

Argnani

Armigliato

Pagnoni

et al. 2012

Nat. Hazards Earth Syst. Sci.

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South-eastern Sicily has been affected by large historical earthquakes, including the 11 January 1693 earthquake, considered the largest magnitude earthquake in the history of Italy (Mw = 7.4). This earthquake was accompanied by a large tsunami (tsunami magnitude 2.3 in the Murty-Loomis scale adopted in the Italian tsunami catalogue by Tinti et al., 2004), suggesting a source in the near offshore. The fault system of the eastern Sicily slope is characterised by NNW–SSE-trending east-dipping extensional faults active in the Quaternary. The geometry of a fault that appears currently active has been derived from the interpretation of seismic data, and has been used for modelling the tsunamigenic source. Synthetic tide-gauge records from modelling this fault source indicate that the first tsunami wave polarity is negative (sea retreat) in almost all the coastal nodes of eastern Sicily, in agreement with historical observations. The outcomes of the numerical simulations also indicate that the coastal stretch running from Catania to Siracusa suffered the strongest tsunami impact, and that the highest tsunami waves occurred in Augusta, aslo in agreement with the historical accounts. A large-size submarine slide (almost 5 km3) has also been identified along the slope, affecting the footwall of the active fault. Modelling indicates that this slide gives non-negligible tsunami signals along the coast; though not enough to match the historical observations for the 1693 tsunami event. The earthquake alone or a combination of earthquake faulting and slide can possibly account for the large run up waves reported for the 11 January 1693 event

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“…Seismic activity occurs along the Padan-Adriatic and the Calabrian-Sicilian thrust fronts (Lavecchia et al, , 2007. Since late Pliocene times, the intra-Apennine compressional structure domain has undergone normal and normal oblique extension, which is still active and responsible for large crustal extensional earthquakes (Chiarabba et al, 2005). This domain, characterized by thickened crust (up to 40-45 km) and unthinned underlying mantle lithosphere (~100-110 km) ( Mt.…”

Section: Magmatotectonic Domainsmentioning

confidence: 99%

“…Such an interpretation is largely based on the presence of deep-focus earthquakes (up to depths of ~500 km) supposedly associated with a westerly-dipping subduction plane (D'Agostino and Selvaggi, 2004;Chiarabba et al, 2005). As a matter of fact, the Southern Tyrrhenian Benioff Plane (STBP), analysed in terms of size, strain deformation pattern and spatial relationships with the overlying Aeolian volcanic arc appears to be in conflict with the classic geometric and kinematic configurations predicted by both active and passive subduction-related models (Isacks and Molnar, 1971).…”

Section: The Southern Tyrrhenian Benioff Planementioning

confidence: 99%

Magmatectonic Zonation of Italy: A Tool to Understanding Mediterranean Geodynamics

Lavecchia¹,

Bell²

2012

Updates in Volcanology - A Comprehensive Approach to Volcanological Problems

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A new view of Italian seismicity using 20 years of instrumental recordings

Cited by 436 publications

References 37 publications

Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy)

Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy)

Active tectonics along the submarine slope of south-eastern Sicily and the source of the 11 January 1693 earthquake and tsunami

Magmatectonic Zonation of Italy: A Tool to Understanding Mediterranean Geodynamics

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