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Authors: Pezzo, G.*
Merryman Boncori, J. P.*
Tolomei, C.*
Salvi, S.*
Atzori, S.*
Antonioli, A.*
Trasatti, E.*
Novali, F.*
Serpelloni, E.*
Candela, L.*
Giuliani, R.*
Title: Coseismic deformation and source modeling of the May 2012 Emilia (Northern Italy) earthquakes
Title of journal: Seismological Research Letters
Series/Report no.: 4/84 (2013)
Publisher: Seismological Society of America
Issue Date: 2013
DOI: 10.1785/0220120171
Keywords: Earthquake
CFF analysis
Seismic source
Northern apennine (Italy)
Abstract: On 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.
Appears in Collections:Papers Published / Papers in press
04.03.06. Measurements and monitoring
04.03.07. Satellite geodesy
04.06.01. Earthquake faults: properties and evolution
04.06.02. Earthquake interactions and probability
04.06.03. Earthquake source and dynamics
04.06.11. Seismic risk
04.07.02. Geodynamics
04.07.07. Tectonics
05.01.01. Data processing
05.02.02. Seismological data

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