Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8552
AuthorsPezzo, G.* 
Merryman Boncori, J. P.* 
Tolomei, C.* 
Salvi, S.* 
Atzori, S.* 
Antonioli, A.* 
Trasatti, E.* 
Novali, F.* 
Serpelloni, E.* 
Candela, L.* 
Giuliani, R.* 
TitleCoseismic deformation and source modeling of the May 2012 Emilia (Northern Italy) earthquakes
Issue Date2013
Series/Report no.4/84 (2013)
DOI10.1785/0220120171
URIhttp://hdl.handle.net/2122/8552
KeywordsEarthquake
CFF analysis
Tectonic
geodynamic
Seismic source
Northern apennine (Italy)
Subject Classification04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring 
04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy 
04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution 
04. Solid Earth::04.06. Seismology::04.06.02. Earthquake interactions and probability 
04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk 
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics 
04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics 
05. General::05.01. Computational geophysics::05.01.01. Data processing 
05. General::05.02. Data dissemination::05.02.02. Seismological data 
AbstractOn May 20th, 2012, an ML 5.9 earthquake (Table 1) occurred near the town of Finale Emilia, in the Central Po Plain, Northern Italy (Figure 1). The mainshock caused 7 casualties and the collapse of several historical buildings and industrial sheds. The earthquake sequence continued with diminishing aftershock magnitudes until May 29th, when an ML 5.8 earthquake occurred near the town of Mirandola, ~12 km WSW of the mainshock (Scognamiglio et al., 2012). This second mainshock started a new aftershock sequence in this area, and increased structural damage and collapses, causing 19 more casualties and increasing to 15.000 the number of evacuees. Shortly after the first mainshock, the Department of Civil Protection (DPC) activated the Italian Space Agency (ASI), which provided post-seismic SAR Interferometry data coverage with all 4 COSMO-SkyMed SAR satellites. Within the next two weeks, several SAR Interferometry (InSAR) image pairs were processed by the INGV-SIGRIS system (Salvi et al., 2012), to generate displacement maps and preliminary source models for the emergency management. These results included continuous GPS site displacement data, from private and public sources, located in and around the epicentral area. In this paper we present the results of the geodetic data modeling, identifying two main fault planes for the Emilia seismic sequence and computing the corresponding slip distributions. We discuss the implication of this seismic sequence on the activity of the frontal part of the Northern Apennine accretionary wedge by comparing the co-seismic data with the long term (geological) and present day (GPS) velocity fields.
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