The 6 April 2009 Mw 6.3 L'Aquila (Central Italy) Earthquake: Strong-motion Observations

Ameri, Gabriele; Massa, Marco; Bindi, Dino; D’Alema, Ezio; Gorini, A.; Luzi, Lucia; Marzorati, S.; Pacor, Francesca; Paolucci, Roberto; Puglia, Rodolfo; Smerzini, Chiara

doi:10.1785/gssrl.80.6.951

Cited by 82 publications

(56 citation statements)

References 23 publications

(15 reference statements)

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“…The PGA values are stretched to the south east, indicating directivity effects in the rupture propagation (Ameri et al, 2009;Akinci et al, 2009). This strong directivity effect towards the SE revealed by the accelerometers, and the heterogeneous slip distribution (Cirella et al, 2009), favours an inherent asymmetry of the mainshock.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…L'Aquila mainshock has been densely recorded by the national strong motion network (Ameri et al, 2009) and data from 49 stations in the distance range 0<=Rjb<=200 km are available in the ITACA database. In addition, down-hole, crosshole and SASW tests have been performed at the near source stations, in order to characterize the sites that constrain the attenuation at short distances.…”

Section: Comparison With Ita08mentioning

confidence: 99%

Ground motion prediction equations derived from the Italian strong motion database

Bindi

Pacor

Luzi

et al. 2011

Bull Earthquake Eng

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328

263

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We present a set of ground motion prediction equations (GMPEs) derived for the geometrical mean of the horizontal components and the vertical, considering the latest release of the strong motion database for Italy. The regressions are performed over the magnitude range 4 -6.9 and considering distances up to 200 km. The equations are derived for peak ground acceleration (PGA), peak ground velocity (PGV) and 5%-damped spectral acceleration at periods between 0.04 and 2 s. The total standard deviation (sigma) varies between 0.34 and 0.38 log 10 unit, confirming the large variability of ground shaking parameters when regional data sets containing small to moderate magnitude events (M < 6) are used. The between-stations variability provides the largest values for periods shorter than 0.2 s while, for longer periods, the between-events and between-stations distributions of error provide similar contribution to the total variability.

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“…The fragility curves herein adopted are empirical, that is were obtained, in a previous study, from observed damages after the occurrence of past earthquakes in Italy [24][25][26][27][28]. More precisely, they were evaluated by applying the bayesian updating method to damage data recorded in the 1980's Irpinia and the 1976's Friuli earthquakes.…”

Section: Proposed Methodologymentioning

confidence: 99%

Seismic Safety Evaluation of Historical Centres

Vanzi¹,

Biondi²,

Fiore³

et al. 2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The 6 April 2009 Mw 6.3 L'Aquila (Central Italy) Earthquake: Strong-motion Observations

Cited by 82 publications

References 23 publications

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

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

Ground motion prediction equations derived from the Italian strong motion database

Seismic Safety Evaluation of Historical Centres

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The 6 April 2009 Mw 6.3 L'Aquila (Central Italy) Earthquake: Strong-motion Observations

Cited by 82 publications

References 23 publications

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

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

Ground motion prediction equations derived from the Italian strong motion database

Seismic Safety Evaluation of Historical Centres

Contact Info

Product

Resources

About

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

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