The Paganica Fault and Surface Coseismic Ruptures Caused by the 6 April 2009 Earthquake (L'Aquila, Central Italy)

Falcucci, Emanuela; Gori, Stefano; Peronace, Edoardo; Fubelli, Giandomenico; Moro, Marco; Saroli, Michele; Giaccio, Biagio; Messina, Paolo; Naso, Giuseppe; Scardia, Giancarlo; Sposato, A.; Voltaggio, Mario; Galli, Paolo; Galadini, Fabrizio

doi:10.1785/gssrl.80.6.940

Cited by 106 publications

(90 citation statements)

References 17 publications

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“…Galadini and Galli 1999;Galadini and Messina 2004)-which is evidently longer (at the surface) than the Mt. Morrone fault system, as depicted in this study-and (2) the April 6, 2009 ''L'Aquila earthquake'' (Mw 6.3) was caused by the about 10-11 km-long Paganica fault (Falcucci et al 2009)-that is shorter than the Mt. Morrone fault system-a reliable moment magnitude of an earthquake that might originate on the 22-23 km-long Mt.…”

Section: Expected Magnitudementioning

confidence: 51%

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

Gori

Giaccio

Galadini

et al. 2009

Int J Earth Sci (Geol Rundsch)

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In the present work we analyse one of the active normal faults affecting the central Apennines, i.e. the Mt. Morrone normal fault system. This tectonic structure, which comprises two parallel, NW-SE trending fault segments, is considered as potentially responsible for earthquakes of magnitude C 6.5 and its last activation probably occurred during the second century AD. Structural observations performed along the fault planes have allowed to define the mainly normal kinematics of the tectonic structure, fitting an approximately N 20°trending extensional deformation. Geological and geomorphological investigations performed along the whole Mt. Morrone south-western slopes permitted us to identify the displacement of alluvial fans, attributed to Middle and Late Pleistocene by means of tephro-stratigraphic analyses and geomorphological correlations with dated lacustrine sequences, along the western fault branch. This allowed to evaluate in 0.4 ± 0.07 mm/year the slip rate of this segment. On the other hand, the lack of synchronous landforms and/or deposits that can be correlated across the eastern fault segment prevented the definition of the slip rate related to this fault branch. Nevertheless, basing on a critical review of the available literature dealing with normal fault systems evolution, we hypothesised a total slip rate of the fault system in the range of 0.4 ± 0.07 to 0.8 ± 0.09 mm/year. Moreover, basing on the length at surface of the Mt. Morrone fault system (i.e. 22-23 km) we estimated the maximum expected magnitude of an earthquake that might originate along this tectonic structure in the order of 6.6-6.7.

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Section: Expected Magnitudementioning

confidence: 51%

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

Gori

Giaccio

Galadini

et al. 2009

Int J Earth Sci (Geol Rundsch)

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“…These faults include t�e Paganica fault, w�ic� defines t�e NE border of t�e basin and s�ows evidence of Late Pleistocene-Holocene activity (Papanikolaou et al 2005). This fault is considered as t�e surface expression of t�e fault responsible for t�e L' Aquila sequence main s�ock (Pondrelli et al 2009;Atzori et al 2009), w�ic� dramati-, w�ic� dramatically struck t�is area in April 2009 and caused coseismic ground deformation (Anzidei et al 2009;Falcucci et al 2009). In t�e L' Aquila basin area, bot� bedrock and cover…”

Section: )mentioning

confidence: 99%

Collapse sinkholes in the carbonate massifs of Central and Southern Apennines

Santo

Ascione²,

S³

et al. 2012

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“…3c) and locally on the Mt. Pettino segment and the Campo Imperatore fault Falcucci et al, 2009, DST Working Group -Uni CHB, 2009INGV-Emergeo Group, 2009;Michetti et al, 2009). The large amount of ruptures with similar characteristics and displacement values suggest that they can easily confuse which of them are regarded as the primary ruptures.…”

Section: Ground Observations and Surface Rupturesmentioning

confidence: 99%

Deformation pattern of the 6 and 7 April 2009, MW=6.3 and MW=5.6 earthquakes in L'Aquila (Central Italy) revealed by ground and space based observations

Papanikolaou

Foumelis

Parcharidis

et al. 2010

Nat. Hazards Earth Syst. Sci.

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Abstract. The deformation pattern of the 6 and 7 April 2009 MW=6.3 and MW=5.6 earthquakes in L'Aquila is revealed by DInSAR analysis and compared with earthquake environmental effects. The DInSAR predicted fault surface ruptures coincide with localities where surface ruptures have been observed in the field, confirming that the ruptures observed near Paganica village are indeed primary. These ruptures are almost one order of magnitude lower than the ruptures that have been produced by other major surrounding faults in the past. These faults have not been activated during the 2009 event, but have the capacity to generate significantly stronger events. DInSAR analysis shows that 66% (or 305 km2) of the area deformed has been subsided whereas the remaining 34% (or 155 km2) has been uplifted. A footwall uplift versus hangingwall subsidence ratio of about 1/3 is extracted from the mainshock. The maximum subsidence (25 cm) was recorded about 4.5 km away from the primary surface ruptures and about 9 km away from the epicentre. In the immediate hangingwall, subsidence did not exceeded 15 cm, showing that the maximum subsidence is not recorded near the ruptured fault trace, but closer to the hangingwall centre. The deformation pattern is asymmetrical expanding significantly towards the southeast. A part of this asymmetry can be attributed to the contribution of the 7 April event in the deformation field.

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The Paganica Fault and Surface Coseismic Ruptures Caused by the 6 April 2009 Earthquake (L'Aquila, Central Italy)

Cited by 106 publications

References 17 publications

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

Collapse sinkholes in the carbonate massifs of Central and Southern Apennines

Deformation pattern of the 6 and 7 April 2009, <i>M</i><sub>W</sub>=6.3 and <i>M</i><sub>W</sub>=5.6 earthquakes in L'Aquila (Central Italy) revealed by ground and space based observations

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The Paganica Fault and Surface Coseismic Ruptures Caused by the 6 April 2009 Earthquake (L'Aquila, Central Italy)

Cited by 106 publications

References 17 publications

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

Collapse sinkholes in the carbonate massifs of Central and Southern Apennines

Deformation pattern of the 6 and 7 April 2009, &lt;i&gt;M&lt;/i&gt;&lt;sub&gt;W&lt;/sub&gt;=6.3 and &lt;i&gt;M&lt;/i&gt;&lt;sub&gt;W&lt;/sub&gt;=5.6 earthquakes in L'Aquila (Central Italy) revealed by ground and space based observations

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Deformation pattern of the 6 and 7 April 2009, <i>M</i><sub>W</sub>=6.3 and <i>M</i><sub>W</sub>=5.6 earthquakes in L'Aquila (Central Italy) revealed by ground and space based observations