Linking the Alps and Apennines subduction systems: New constraints revealed by high-resolution teleseismic tomography

Giacomuzzi, G.; Chiarabba, C.; Gori, Pasquale De

doi:10.1016/j.epsl.2010.11.033

Cited by 76 publications

(105 citation statements)

References 83 publications

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“…Constraints on the slab interface geometry in this area are provided essentially by seismic profiles (Finetti, 2005;Minelli and Faccenna, 2010;Polonia et al, 2011Polonia et al, , 2012. V p and V s tomography reveals the presence of a high velocity anomaly beneath the Tyrrhenian Sea as deep as 600 km (Piromallo and Morelli, 2003;Chiarabba et al, 2008;Giacomuzzi et al, 2011). Seismicity distribution depicts a steep NW dipping Wadati-Benioff zone down to a maximum depth of 450 km (Chiarabba et al, 2005).…”

Section: Subduction Fault Source (Type 1)mentioning

confidence: 99%

“…Various levels of detail were applied to describe the subduction geometry, often in consideration of the distance from the target coasts or other technical factors (Annaka et al, 2007;Burbidge et al, 2008;González et al, 2009;Power et al, 2012). Burbidge et al (2008) also took into account fault sources other than megathrusts associated with subduction zones and used criteria based on the expected potential tsunami threat to preselect the fault sources to be included in the analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Some PTHA studies mainly relied on earthquake catalogs to delineate broad area sources (Mitsoudis et al, 2012;Sørensen et al, 2012) or gridded seismicity (Grezio et al, 2012). Recurrence time or frequency of earthquake sources is often based on the Gutenberg-Richter power law (Power et al, 2007;Burbidge et al, 2008;Power et al, 2012;Grezio et al, 2012;Sørensen et al, 2012) or the characteristic earthquake model (Annaka et al, 2007;González et al, 2009) or both (Geist and Parsons, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Integrating geologic fault data into tsunami hazard studies

Basili

Tiberti

Kastelic

et al. 2013

Nat. Hazards Earth Syst. Sci.

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We present the realization of a fault-source data set designed to become the starting point in regional-scale tsunami hazard studies. Our approach focuses on the parametric fault characterization in terms of geometry, kinematics, and assessment of activity rates, and includes a systematic classification in six justification levels of epistemic uncertainty related with the existence and behaviour of fault sources. We set up a case study in the central Mediterranean Sea, an area at the intersection of the European, African, and Aegean plates, characterized by a complex and debated tectonic structure and where several tsunamis occurred in the past. Using tsunami scenarios of maximum wave height due to crustal earthquakes (M_w=7) and subduction earthquakes (M_w=7 and M_w=8), we illustrate first-order consequences of critical choices in addressing the seismogenic and tsunamigenic potentials of fault sources. Although tsunamis generated by M_w=8 earthquakes predictably affect the entire basin, the impact of tsunamis generated by M_w=7 earthquakes on either crustal or subduction fault sources can still be strong at many locales. Such scenarios show how the relative location/orientation of faults with respect to target coastlines coupled with bathymetric features suggest avoiding the preselection of fault sources without addressing their possible impact onto hazard analysis results

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Section: Subduction Fault Source (Type 1)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integrating geologic fault data into tsunami hazard studies

Basili

Tiberti

Kastelic

et al. 2013

Nat. Hazards Earth Syst. Sci.

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“…Evidence of the cold subducting Calabrian slab can be seen via fast-velocity perturbations in seismic tomography (e.g. Wortel and Spakman 2000;Giacomuzzi et al 2011) and by seismicity in the Benioff zone seismicity, which extends down to ~500 km (Chiarabba et al 2005). The cusps of the Calabrian arc are composed of continental material and appear to be hindering subduction (FIG.…”

Section: Seismic Mapping Of Underlying Mantle Structurementioning

confidence: 99%

“…2A). Beneath the northern Apennines (Italy), tomographic images show a continuous region of fast-velocity material from the near-surface to the lower mantle (Wortel and Spakman 2000;Giacomuzzi et al 2011;FIG. 2).…”

Section: Seismic Mapping Of Underlying Mantle Structurementioning

confidence: 99%

Collisional Processes and Links to Episodic Changes in Subduction Zones

Hunen

Miller

2015

Elements

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Collisional Processes and Links to Episodic Changes in Subduction ZonesJeroen van Hunen 1 and Meghan S. Miller 2Continental collision is commonly accompanied by a sequence of several plate-mantle interactions, including accretion of buoyant features, pulses of slab rollback, slab break-off, formation of slab windows, and lithosphere delamination. Using the combined insight from seismic and dynamical modelling studies, we illustrate how these processes and their characteristic rates and timescales played an important role in shaping the Mediterranean and how they dominated the closure of the Tethyan oceans. Older collisions such as the one that formed the Norwegian Caledonites probably experienced similarly complex plate-mantle interaction, but direct evidence of the associated mantle dynamics is absent.

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Vertical GPS ground motion rates in the Euro‐Mediterranean region: New evidence of velocity gradients at different spatial scales along the Nubia‐Eurasia plate boundary

Faccenna²,

et al. 2013

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[1] We use 2.5 to 14 years long position time series from >800 continuous Global Positioning System (GPS) stations to study vertical deformation rates in the Euro-Mediterranean region. We estimate and remove common mode errors in position time series using a principal component analysis, obtaining a significant gain in the signal-to-noise ratio of the displacements data. Following the results of a maximum likelihood estimation analysis, which gives a mean spectral index~À0.7, we adopt a power law + white noise stochastic model in estimating the final vertical rates and find 95% of the velocities within ±2 mm/yr, with uncertainties from filtered time series~40% smaller than from the unfiltered ones. We highlight the presence of statistically significant velocity gradients where the stations density is higher. We find undulations of the vertical velocity field at different spatial scales both in tectonically active regions, like eastern Alps, Apennines, and eastern Mediterranean, and in regions characterized by a low or negligible tectonic activity, like central Iberia and western Alps. A correlation between smooth vertical velocities and topographic features is apparent in many sectors of the study area. Glacial isostatic adjustment and weathering processes do not completely explain the measured rates, and a combination of active tectonics and deep-seated geodynamic processes must be invoked. Excluding areas where localized processes are likely, or where subduction processes may be active, mantle dynamics is the most likely process, but regional mantle modeling is required for a better understanding.

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Linking the Alps and Apennines subduction systems: New constraints revealed by high-resolution teleseismic tomography

Cited by 76 publications

References 83 publications

Integrating geologic fault data into tsunami hazard studies

Integrating geologic fault data into tsunami hazard studies

Collisional Processes and Links to Episodic Changes in Subduction Zones

Vertical GPS ground motion rates in the Euro‐Mediterranean region: New evidence of velocity gradients at different spatial scales along the Nubia‐Eurasia plate boundary

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