Seismogenic sources in the Adriatic Domain

Kastelic, Vanja; Vannoli, Paola; Burrato, Pierfrancesco; Fracassi, Umberto; Tiberti, Mara Monica; Valensise, Gianluca

doi:10.1016/j.marpetgeo.2012.08.002

Cited by 69 publications

(50 citation statements)

References 128 publications

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“…3). These exhibit relatively unclear kinematics but are likely to represent regional-scale tear faults that accommodate strain between different portions of the thrust system (Kastelic et al, 2013).…”

Section: Seismotectonic Frameworkmentioning

confidence: 99%

The Source of the 30 October 1930M_w 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

Vannoli¹,

Vannucci²,

Bernardi³

et al. 2015

Bulletin of the Seismological Society of America

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On 30 October 1930, an M w 5.8 earthquake hit the northern Marche coastal area (central Italy), causing significant damage (I 0 VIII-IX degree Mercalli-CancaniSieberg) along a 40 km stretch of the Adriatic coast between Pesaro and Ancona, centered on the town of Senigallia. This area is characterized by relatively infrequent and moderate-sized earthquakes and by elusive active faults. In spite of the presence of wellknown northwest-southeast-trending, northeast-verging fault-propagation folds forming the outer thrusts of the Apennines, the current level of activity, and the kinematics of these coastal structures are still controversial.We present a multidisciplinary analysis of the source of the 30 October 1930 Senigallia earthquake, combining instrumental and macroseismic data and elaborations with available evidence from geological and tectonic investigations. We determine the main seismic parameters of the source, including the earthquake location, its magnitude, and, for the first time, its focal mechanism, providing the first instrumental evidence for thrust faulting along the northern Marche coastal belt.Our findings provide conclusive evidence for the current activity of the northern Marche coastal thrusts. As such they have significant implications for the seismic hazard of the area, a densely populated region that hosts historical heritage, tourism facilities, industrial districts, and key transportation infrastructures.Online Material: Description of method used for moment tensor computation, tables of focal mechanisms and recording stations, and figures of seismic flux and uncertainty maps for macroseismic epicenters.

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Section: Seismotectonic Frameworkmentioning

confidence: 99%

The Source of the 30 October 1930M_w 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

Vannoli¹,

Vannucci²,

Bernardi³

et al. 2015

Bulletin of the Seismological Society of America

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“…Earthquakes from the northern and the central part of the research area occurred along generally N-S striking regional faults. By contrast, Radovanović (2003), Fügenschuh & Schmid (2005), Bada et al (2007), Kastelic et al (2013). Numbers 1-4 indicates the regions studied by Bada et al (2007); tensors 5 and 6 are based on research of Marović et al (2002a); tensor 7 indicate region studied by Fügenschuh & Schmid (2005).…”

Section: Discussionmentioning

confidence: 99%

The recent fault kinematics in the westernmost part of the Getic nappe system (Eastern Serbia): Evidence from fault slip and focal mechanism data

Mladenović¹,

Trivić²,

Antić³

et al. 2014

Geologica Carpathica

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Abstract:In this study we performed a calculation of the tectonic stress tensor based on fault slip data and all available focal mechanisms in order to determine the principal stress axes and the recent tectonic regime of the westernmost unit of the Getic nappe system (Gornjak-Ravanica Zone, Eastern Serbia). The study is based on a combined dataset involving paleostress analyses, the inversion of focal mechanisms and remote sensing. The results show dominant strike-slip kinematics with the maximal compression axis oriented NNE-SSW. This is compatible with a combined northward motion and counterclockwise rotation of the Adria plate as the controlling factor. However, the local stress field is also shown to be of great importance and is superimposed on the far-field stress. We managed to distinguish three areas with distinct seismic activity. The northern part of the research area is characterized by transtensional tectonics, possibly under the influence of the extension in the areas situated more to the northeast. The central and seismically most active part is dominated by strike-slip tectonics whereas the southern area is slightly transpressional, possibly under the influence of the rigid Moesian Platform situated to the east of the research area. The dominant active fault systems are oriented N-S (to NE-SW) and NW-SE and they occur as structures of either regional or local significance. Regional structures are active in the northern and central part of the study area, while the active fault systems in the southern part are marked as locally important. This study suggests that seismicity of this area is controlled by the release of accumulated stress at local accommodation zones which are favourably oriented in respect to the active regional stress field.

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“…Based on the seismicity data presented in this work, their distribution, and the general constraints of the transfer model, we favor the soft linkage transfer model. (M w N 5.5) occurs in long (50, 100 or more km) fault systems, regardless of their kinematics (for a summary: Basili et al, 2008;Bigi et al, 1992;DISS Working Group, 2010;Kastelic et al, 2013;Patacca and Scandone, 2004) -a view in part shared also by Brozzetti (2011). After all, fault systems exhibit continuity along strike until adverse constraints occur (Ramsay and Huber, 1987;Wezel, 1986), such as a pre-existing deep-seated ramp, a major structural discontinuity, or a critical shift of topographic and/or tectonic load.…”

Section: Seismological Evidencementioning

confidence: 99%

A soft linkage between major seismogenic fault systems in the central-southern Apennines (Italy): Evidence from low-magnitude seismicity

Fracassi

Milano

2014

Tectonophysics

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Seismogenic sources in the Adriatic Domain

Cited by 69 publications

References 128 publications

The Source of the 30 October 1930M_w 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

The Source of the 30 October 1930M_w 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

The recent fault kinematics in the westernmost part of the Getic nappe system (Eastern Serbia): Evidence from fault slip and focal mechanism data

A soft linkage between major seismogenic fault systems in the central-southern Apennines (Italy): Evidence from low-magnitude seismicity

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Seismogenic sources in the Adriatic Domain

Cited by 69 publications

References 128 publications

The Source of the 30 October 1930Mw 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

The Source of the 30 October 1930Mw 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

The recent fault kinematics in the westernmost part of the Getic nappe system (Eastern Serbia): Evidence from fault slip and focal mechanism data

A soft linkage between major seismogenic fault systems in the central-southern Apennines (Italy): Evidence from low-magnitude seismicity

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The Source of the 30 October 1930M_w 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

The Source of the 30 October 1930M_w 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data