Seismic hazard of the Northern Apennines based on 3D seismic sources

Martelli, Luca; Santulin, M.; Sani, Federico; Tamaro, Alberto; Bonini, Marco; Rebez, A.; Corti, Giacomo; Slejko, D.

doi:10.1007/s10950-017-9665-1

Cited by 9 publications

(4 citation statements)

References 52 publications

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“…Several studies estimated the PSHA in the area of Campotosto (e.g. Meletti et al 2006;Stucchi et al 2011;Woessner et al 2015;Martelli et al 2017;Santulin et al 2017); although the zonations used in these studies are similar, different Ground Motion Models (GMM) led to a generalized increase in the PSHA values.…”

Section: Introductionmentioning

confidence: 99%

Near-source ground motion estimation for assessing the seismic hazard of critical facilities in central Italy

Moratto

Santulin

Tamaro

et al. 2022

Bull Earthquake Eng

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We apply the Probabilistic Seismic Hazard Analysis (PSHA) and compute Physics-Based Simulations (PBS) of ground motion for three dams in the Campotosto area (Central Italy). The dams, which confine an artificial water reservoir feeding hydroelectric power plants, are located in an active seismic zone between the areas that experienced the 2009 L’Aquila and 2016–2017 Central Italy seismic sequences. The probabilistic disaggregation estimated for a return period of 2475 years, corresponding to the collapse limit state for critical facilities, indicates that the most dangerous fault is associated with a maximum magnitude of 6.75 ± 0.25 within a distance of 10 km. This fault is used in PBS to emulate the Maximum Credible Earthquake scenario. To capture the ground motion variability, we input a pseudo-dynamic source model to encompass spatial and temporal variations in the slip, rise time and rupture propagation, heavily affecting the near-source ground motion. Indeed, the ground motion above the rupture volume is mainly influenced by the epistemic uncertainties of rupture nucleation and slip distribution. The computed broadband seismograms are consistent with the near-source shaking recorded during the 2016 MW 6.6 Norcia earthquake and constrain the upper bound of the simulated ground motion at specific sites. Our modelling reinforces the importance of considering vertical ground motion near the source in seismic design. It could reach shaking values comparable to or larger than those of the horizontal components. This approach can be applied in other areas with high seismic hazard to evaluate the seismic safety of existing critical facilities.

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Section: Introductionmentioning

confidence: 99%

Near-source ground motion estimation for assessing the seismic hazard of critical facilities in central Italy

Moratto

Santulin

Tamaro

et al. 2022

Bull Earthquake Eng

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“…The northeast Apennines Deformation Front is presently primarily buried beneath the Po Valley and extends offshore in the western Adriatic Sea [23,24,28,29]. Recent seismicity, including the 2012 Emilia Mw 5.9 thrust earthquake [4,33], along with geomorphic studies [29], clearly show that folding and thrusting associated with the ADF are currently active. The Apennines Range Front [25,[27][28][29] lies some 60 km to the southwest of the ADF.…”

Section: Main Structural Domains In the Northern Apenninesmentioning

confidence: 99%

“…During 2013, a series of seismic events occurred within the investigated area, soon after the end of the Emilia 2012 seismic sequence [4,33,74]. The 2013 events affected domain SD3 (Garfagnana) in January and the transition zone between SD2 and SD3 in June and August.…”

Section: The 2013 Seismic Activitymentioning

confidence: 99%

Active Fault Systems in the Inner Northwest Apennines, Italy: A Reappraisal One Century after the 1920 Mw ~6.5 Fivizzano Earthquake

et al. 2021

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Based on the review of the available stratigraphic, tectonic, morphological, geodetic, and seismological data, along with new structural observations, we present a reappraisal of the potential seismogenic faults and fault systems in the inner northwest Apennines, Italy, which was the site, one century ago, of the devastating Mw ~6.5, 1920 Fivizzano earthquake. Our updated fault catalog provides the fault locations, as well as the description of their architecture, large-scale segmentation, cumulative displacements, evidence for recent to present activity, and long-term slip rates. Our work documents that a dense network of active faults, and thus potential earthquake fault sources, exists in the region. We discuss the seismogenic potential of these faults, and propose a general tectonic scenario that might account for their development.

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“…The external front of the Northern Apennine FTB is still active, as demonstrated by the presence of compressional seismicity (e.g. Boccaletti et al 2010;Ponza et al 2010;Gunderson et al 2013;Maesano et al 2013Maesano et al , 2015Chiarabba et al 2014;Martelli et al 2017;Maestrelli et al 2018) as well as by geodetic global positioning system data (Hunstad et al 2003;Serpelloni et al 2005Serpelloni et al , 2006Bennett et al 2012;Devoti et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Geological and geophysical study of a thin-skinned tectonic wedge formed during an early collisional stage: the Trasimeno Tectonic Wedge (Northern Apennines, Italy)

et al. 2019

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The presence of a set of well-known turbidite successions, deposited in progressively E-migrating foredeep basins and subsequently piled up with east vergence, makes the Northern Apennines of Italy paradigmatic of the evolution of deepwater fold-and-thrust belts. This study focuses on the early Apenninic collisional stage, early Miocene in age, which led to the accretion of the turbidites of the Trasimeno Tectonic Wedge (TTW), in the central part of the Northern Apennines. Based on the interpretation of previously unpublished seismic reflection profiles with new surface geology data and tectonic balancing, we present a detailed tectonic reconstruction of the TTW. In the study area, the TTW is characterized by a W-dipping shaly basal décollement located at a depth of 1–5 km. The tectonic wedge is c. 5 km thick at its central-western part and tapers progressively eastwards to c. 1 km. The total shortening, balanced along a 33 km long cross-section, is c. 60 km, including 20 km (40%) of internal imbrication, c. 23 km of horizontal ENE-wards translation along the basal décollement and c. 17 km of passive translation caused by the later shortening of footwall units. Deformation balancing, constrained through upper Aquitanian – upper Burdigalian (c. 21–16 Ma) biostratigraphy, provides an average shortening rate of c. 8.6 mm a–1. Internal shortening of the TTW shows an average shortening rate of c. 4 mm a–1 for this period.

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Seismic hazard of the Northern Apennines based on 3D seismic sources

Cited by 9 publications

References 52 publications

Near-source ground motion estimation for assessing the seismic hazard of critical facilities in central Italy

Near-source ground motion estimation for assessing the seismic hazard of critical facilities in central Italy

Active Fault Systems in the Inner Northwest Apennines, Italy: A Reappraisal One Century after the 1920 Mw ~6.5 Fivizzano Earthquake

Geological and geophysical study of a thin-skinned tectonic wedge formed during an early collisional stage: the Trasimeno Tectonic Wedge (Northern Apennines, Italy)

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