Options
The 2009 L’Aquila (central Italy) MW6.3 earthquake: Main shock
Author(s)
Language
English
Obiettivo Specifico
3.1. Fisica dei terremoti
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/36 (2009)
Pages (printed)
L18308
Issued date
September 30, 2009
Keywords
Abstract
A MW
6.3 earthquake struck on April 6, 2009 the
Abruzzi region (central Italy) producing vast damage in the
L’Aquila town and surroundings. In this paper we present
the location and geometry of the fault system as obtained
by the analysis of main shock and aftershocks recorded
by permanent and temporary networks. The distribution of
aftershocks, 712 selected events with ML 2.3 and 20 with
ML 4.0, defines a complex, 40 km long, NW trending
extensional structure. The main shock fault segment extends
for 15–18 km and dips at 45 to theSW, between 10 and 2 km
depth. The extent of aftershocks coincides with the surface
trace of the Paganica fault, a poorly known normal fault
that, after the event, has been quoted to accommodate the
extension of the area.We observe a migration of seismicity to
the north on an echelon fault that can rupture in future large
earthquakes.
6.3 earthquake struck on April 6, 2009 the
Abruzzi region (central Italy) producing vast damage in the
L’Aquila town and surroundings. In this paper we present
the location and geometry of the fault system as obtained
by the analysis of main shock and aftershocks recorded
by permanent and temporary networks. The distribution of
aftershocks, 712 selected events with ML 2.3 and 20 with
ML 4.0, defines a complex, 40 km long, NW trending
extensional structure. The main shock fault segment extends
for 15–18 km and dips at 45 to theSW, between 10 and 2 km
depth. The extent of aftershocks coincides with the surface
trace of the Paganica fault, a poorly known normal fault
that, after the event, has been quoted to accommodate the
extension of the area.We observe a migration of seismicity to
the north on an echelon fault that can rupture in future large
earthquakes.
References
Akinci, A., F. Galadini, D. Pantosti, M. D. Petersen, L. Malagnini, and
D. Perkins (2009), Effect of time dependence on probabilistic seismichazard
maps and deaggregation for the central Apennines, Italy, Bull.
Seismol. Soc. Am., 99, 585– 610, doi:10.1785/0120080053.
Amato, A., and F. M. Mele (2008), Performance of the INGV National
Seismic Network from 1997 to 2007, Ann. Geophys., 51, 417– 431.
Amato, A., et al. (1998), The 1997 Umbria-Marche, Italy, earthquake
sequence: A first look at the main shocks and aftershocks, Geophys.
Res. Lett., 25, 2861–2864, doi:10.1029/98GL51842.
Amoruso, A., L. Crescentini, and R. Scarpa (1998), Inversion of source
parameters from near and far field observations: An application to the
1915 Fucino earthquakes, central Apennines, J. Geophys. Res., 103,
29,989– 29,999, doi:10.1029/98JB02849.
Atzori, S., I. Hunstad, M. Chini, S. Salvi, C. Tolomei, C. Bignami,
S. Stramondo, E. Trasatti, A. Antonioli, and E. Boschi (2009), Finite
fault inversion of DInSAR coseismic displacement of the 2009 L’Aquila
earthquake (central Italy), Geophys. Res. Lett., 36, L15305, doi:10.1029/
2009GL039293.
Bagh, S., L. Chiaraluce, P. De Gori, M. Moretti, A. Govoni, C. Chiarabba,
P. Di Bartolomeo, and M. Romanelli (2007), Background seismicity in
the central Apennines of Italy: The Abruzzo region case study, Tectonophysics,
444, 80–92, doi:10.1016/j.tecto.2007.08.009.
Bagnaia, R., A. D’Epifanio, and S. Sylos Labini (1992), Aquila and Subequan
basins: An example of Quaternary evolution in central Apennines,
Italy, Quat. Nova, 2, 187– 209.
Barchi, M., F. Galadini, G. Lavecchia, P. Messina, A. M. Michetti,
L. Peruzza, A. Pizzi, E. Tondi, and E. Vittori (2000), Sintesi delle conoscenze
sulle faglie attive in Italia centrale: Parametrizzazione ai fini
della caratterizzazione della pericolosita` sismica, report for CNR, Gruppo
Naz. per la Difesa dai Terr., Rome.
Boncio, P., G. Lavecchia, and B. Pace (2004), Defining a model of 3D
seismogenic sources for Seismic Hazard Assessment applications: The
case of central Apennines (Italy), J. Seismol., 8, 407– 425, doi:10.1023/
B:JOSE.0000038449.78801.05.
Camassi, R., et al. (2009), Rapporto sugli effetti del terremoto Aquilano del
6 Aprile 2009, Rep. RPT03, Ist. Naz. di Geofis. e Vulcanol., Milan, Italy.
(Available at http://www.mi.ingv.it/eq/090406/quest.html)
Chiarabba, C., L. Jovane, and R. Di Stefano (2005), A new look to the
Italian seismicity: Seismotectonic inference, Tectonophysics, 395, 251–
268, doi:10.1016/j.tecto.2004.09.013.
Chiaraluce, L., et al. (2004), Complex normal faulting in the Apennines
thrust-and-fold belt: The 1997 seismic sequence in central Italy, Bull.
Seismol. Soc. Am., 94, 99– 116, doi:10.1785/0120020052.
Chiaraluce, L., C. Collettini, M. Barchi, F. Mirabella, and S. Pucci (2005),
Connecting seismically active normal faults with Quaternary geological
structures in a complex extensional environment: The Colfiorito 1997
case history (northern Apennines, Italy), Tectonics, 24, TC1002,
doi:10.1029/2004TC001627.
D’Agostino, N., A. Avallone, D. Cheloni, E. D’Anastasio, S. Mantenuto,
and G. Selvaggi (2008), Active tectonics of the Adriatic region from GPS
and earthquake slip vectors, J. Geophys. Res., 113, B12413, doi:10.1029/
2008JB005860.
De Luca, G., M. Cattaneo, G. Monachesi, and A. Amato (2009), Seismicity
in central and northern Apennines integrating the Italian national and
regional networks, Tectonophysics, doi:10.1016/j.tecto.2008.11, in press.
DISS Working Group (2005), Database of Individual Seismogenic Sources
(version 3.0.1): A compilation of potential sources for earthquakes larger
than M 5.5 in Italy and surrounding areas, Ist. Naz. di Geofis. e Vulcanol.,
Rome. (Available at http://www.ingv.it/banchedati/banche.html)
Emergeo Working Group (2009), Rilievi geologici di terreno effettuati
nell’area epicentrale della sequenza sismica dell’Aquilano del 6 aprile 2009
(in Italian), Ist.Naz. di Geofis. eVulcanol., Rome. (Available at http://portale.
ingv.it/primo-piano/archivio-primo-piano/notizie-2009/terremoto-6-aprile/
copy_of_la-sequenza-sismica-dell-aquilano-aprile-2009/)
Galadini, F., and P. Galli (2000), Active tectonics in the central Apennines
(Italy)—Input data for seismic hazard assessment, Nat. Hazards, 22,
225–270, doi:10.1023/A:1008149531980.
Galli, P., F. Galadini, M. Moro, and C. Giraudi (2002), New paleoseismological
data from the Gran Sasso d’Italia area (central Apennines),
Geophys. Res. Lett., 29(7), 1134, doi:10.1029/2001GL013292.
Gruppo di Lavoro CPTI (2004), Catalogo Parametrico dei Terremoti
Italiani, versione 2004, Rep. CPTI04, Ist. Naz. di Geofis. e Vulcanol.,
Bologna, Italy.
Lahr, J. C. (1989), HYPOELLIPSE/Version 2.0: A computer program for
determining local earthquake hypocentral parameters, magnitude, and
first motion pattern, U.S. Geol. Surv. Open File Rep., 89-116, 92 pp.
Pantosti, D., and G. Valensise (1990), Fault mechanism and complexity of
the November, 23, 1980, Campania-Lucania earthquake, inferred from
surface observations, J. Geophys. Res., 95, 15,319–15,341, doi:10.1029/
JB095iB10p15319.
Pantosti, D., G. D’Addezio, and F. Cinti (1996), Paleoseismicity of the
Ovindoli-Pezza fault, central Apennines, Italy: A history including a large
previously unrecorded earthquake in the Middle Age (860–1300 A.D.),
J. Geophys. Res., 101, 5937– 5959, doi:10.1029/95JB03213.
Papanikolaou, I. D., G. P. Roberts, and A. M. Michetti (2005), Fault scarps
and deformation rates in Lazio-Abruzzo, central Italy: Comparison between
geological fault slip rate and GPS data, Tectonophysics, 408, 147–
176, doi:10.1016/j.tecto.2005.05.043.
Roberts, G., and A. M. Michetti (2004), Spatial and temporal variations
in growth rates along active normal fault systems: An example from the
Lazio Abruzzo Apennines, central Italy, J. Struct. Geol., 26, 339– 376,
doi:10.1016/S0191-8141(03)00103-2.
D. Perkins (2009), Effect of time dependence on probabilistic seismichazard
maps and deaggregation for the central Apennines, Italy, Bull.
Seismol. Soc. Am., 99, 585– 610, doi:10.1785/0120080053.
Amato, A., and F. M. Mele (2008), Performance of the INGV National
Seismic Network from 1997 to 2007, Ann. Geophys., 51, 417– 431.
Amato, A., et al. (1998), The 1997 Umbria-Marche, Italy, earthquake
sequence: A first look at the main shocks and aftershocks, Geophys.
Res. Lett., 25, 2861–2864, doi:10.1029/98GL51842.
Amoruso, A., L. Crescentini, and R. Scarpa (1998), Inversion of source
parameters from near and far field observations: An application to the
1915 Fucino earthquakes, central Apennines, J. Geophys. Res., 103,
29,989– 29,999, doi:10.1029/98JB02849.
Atzori, S., I. Hunstad, M. Chini, S. Salvi, C. Tolomei, C. Bignami,
S. Stramondo, E. Trasatti, A. Antonioli, and E. Boschi (2009), Finite
fault inversion of DInSAR coseismic displacement of the 2009 L’Aquila
earthquake (central Italy), Geophys. Res. Lett., 36, L15305, doi:10.1029/
2009GL039293.
Bagh, S., L. Chiaraluce, P. De Gori, M. Moretti, A. Govoni, C. Chiarabba,
P. Di Bartolomeo, and M. Romanelli (2007), Background seismicity in
the central Apennines of Italy: The Abruzzo region case study, Tectonophysics,
444, 80–92, doi:10.1016/j.tecto.2007.08.009.
Bagnaia, R., A. D’Epifanio, and S. Sylos Labini (1992), Aquila and Subequan
basins: An example of Quaternary evolution in central Apennines,
Italy, Quat. Nova, 2, 187– 209.
Barchi, M., F. Galadini, G. Lavecchia, P. Messina, A. M. Michetti,
L. Peruzza, A. Pizzi, E. Tondi, and E. Vittori (2000), Sintesi delle conoscenze
sulle faglie attive in Italia centrale: Parametrizzazione ai fini
della caratterizzazione della pericolosita` sismica, report for CNR, Gruppo
Naz. per la Difesa dai Terr., Rome.
Boncio, P., G. Lavecchia, and B. Pace (2004), Defining a model of 3D
seismogenic sources for Seismic Hazard Assessment applications: The
case of central Apennines (Italy), J. Seismol., 8, 407– 425, doi:10.1023/
B:JOSE.0000038449.78801.05.
Camassi, R., et al. (2009), Rapporto sugli effetti del terremoto Aquilano del
6 Aprile 2009, Rep. RPT03, Ist. Naz. di Geofis. e Vulcanol., Milan, Italy.
(Available at http://www.mi.ingv.it/eq/090406/quest.html)
Chiarabba, C., L. Jovane, and R. Di Stefano (2005), A new look to the
Italian seismicity: Seismotectonic inference, Tectonophysics, 395, 251–
268, doi:10.1016/j.tecto.2004.09.013.
Chiaraluce, L., et al. (2004), Complex normal faulting in the Apennines
thrust-and-fold belt: The 1997 seismic sequence in central Italy, Bull.
Seismol. Soc. Am., 94, 99– 116, doi:10.1785/0120020052.
Chiaraluce, L., C. Collettini, M. Barchi, F. Mirabella, and S. Pucci (2005),
Connecting seismically active normal faults with Quaternary geological
structures in a complex extensional environment: The Colfiorito 1997
case history (northern Apennines, Italy), Tectonics, 24, TC1002,
doi:10.1029/2004TC001627.
D’Agostino, N., A. Avallone, D. Cheloni, E. D’Anastasio, S. Mantenuto,
and G. Selvaggi (2008), Active tectonics of the Adriatic region from GPS
and earthquake slip vectors, J. Geophys. Res., 113, B12413, doi:10.1029/
2008JB005860.
De Luca, G., M. Cattaneo, G. Monachesi, and A. Amato (2009), Seismicity
in central and northern Apennines integrating the Italian national and
regional networks, Tectonophysics, doi:10.1016/j.tecto.2008.11, in press.
DISS Working Group (2005), Database of Individual Seismogenic Sources
(version 3.0.1): A compilation of potential sources for earthquakes larger
than M 5.5 in Italy and surrounding areas, Ist. Naz. di Geofis. e Vulcanol.,
Rome. (Available at http://www.ingv.it/banchedati/banche.html)
Emergeo Working Group (2009), Rilievi geologici di terreno effettuati
nell’area epicentrale della sequenza sismica dell’Aquilano del 6 aprile 2009
(in Italian), Ist.Naz. di Geofis. eVulcanol., Rome. (Available at http://portale.
ingv.it/primo-piano/archivio-primo-piano/notizie-2009/terremoto-6-aprile/
copy_of_la-sequenza-sismica-dell-aquilano-aprile-2009/)
Galadini, F., and P. Galli (2000), Active tectonics in the central Apennines
(Italy)—Input data for seismic hazard assessment, Nat. Hazards, 22,
225–270, doi:10.1023/A:1008149531980.
Galli, P., F. Galadini, M. Moro, and C. Giraudi (2002), New paleoseismological
data from the Gran Sasso d’Italia area (central Apennines),
Geophys. Res. Lett., 29(7), 1134, doi:10.1029/2001GL013292.
Gruppo di Lavoro CPTI (2004), Catalogo Parametrico dei Terremoti
Italiani, versione 2004, Rep. CPTI04, Ist. Naz. di Geofis. e Vulcanol.,
Bologna, Italy.
Lahr, J. C. (1989), HYPOELLIPSE/Version 2.0: A computer program for
determining local earthquake hypocentral parameters, magnitude, and
first motion pattern, U.S. Geol. Surv. Open File Rep., 89-116, 92 pp.
Pantosti, D., and G. Valensise (1990), Fault mechanism and complexity of
the November, 23, 1980, Campania-Lucania earthquake, inferred from
surface observations, J. Geophys. Res., 95, 15,319–15,341, doi:10.1029/
JB095iB10p15319.
Pantosti, D., G. D’Addezio, and F. Cinti (1996), Paleoseismicity of the
Ovindoli-Pezza fault, central Apennines, Italy: A history including a large
previously unrecorded earthquake in the Middle Age (860–1300 A.D.),
J. Geophys. Res., 101, 5937– 5959, doi:10.1029/95JB03213.
Papanikolaou, I. D., G. P. Roberts, and A. M. Michetti (2005), Fault scarps
and deformation rates in Lazio-Abruzzo, central Italy: Comparison between
geological fault slip rate and GPS data, Tectonophysics, 408, 147–
176, doi:10.1016/j.tecto.2005.05.043.
Roberts, G., and A. M. Michetti (2004), Spatial and temporal variations
in growth rates along active normal fault systems: An example from the
Lazio Abruzzo Apennines, central Italy, J. Struct. Geol., 26, 339– 376,
doi:10.1016/S0191-8141(03)00103-2.
Type
article
File(s)
No Thumbnail Available
Name
2009GL039627.pdf
Description
Main article
Size
1.65 MB
Format
Adobe PDF
Checksum (MD5)
3ecca7dafc7e8d0f25cf7943be3648d8