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The 2009 L’Aquila earthquake (central Italy): A source mechanism and implications for seismic hazard
Author(s)
Language
English
Obiettivo Specifico
3.2. Tettonica attiva
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/36 (2009)
Publisher
AGU Journal
Pages (printed)
L17312
Issued date
September 5, 2009
Last version
http://europa.agu.org:8005/?view=article&uri=/journals/gl/gl0917/2009GL039337/2009GL039337.xml&t=gl,10.1029/2009GL039337
Keywords
Abstract
We use InSAR and body-wave seismology to
determine independent source parameters for the
6th April 2009 Mw 6.3 L’Aquila earthquake and confirm
that the earthquake ruptured a SW-dipping normal fault
with 0.6–0.8 m slip. The causative Paganica fault had
been neglected relative to other nearby range-frontal faults,
partly because it has a subdued geomorphological
expression in comparison with these faults. The L’Aquila
earthquake occurred in an area with a marked seismic
deficit relative to geodetically determined strain
accumulation. We use our source model to calculate stress
changes on nearby faults produced by the L’Aquila
earthquake and we find that several of these faults have
been brought closer to failure.
determine independent source parameters for the
6th April 2009 Mw 6.3 L’Aquila earthquake and confirm
that the earthquake ruptured a SW-dipping normal fault
with 0.6–0.8 m slip. The causative Paganica fault had
been neglected relative to other nearby range-frontal faults,
partly because it has a subdued geomorphological
expression in comparison with these faults. The L’Aquila
earthquake occurred in an area with a marked seismic
deficit relative to geodetically determined strain
accumulation. We use our source model to calculate stress
changes on nearby faults produced by the L’Aquila
earthquake and we find that several of these faults have
been brought closer to failure.
References
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.
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.
D’Agostino, N., J. A. Jackson, F. Dramis, and R. Funiciello (2001), Interactions
between mantle upwelling, drainage evolution and active normal
faulting: An example from the central Apennines (Italy), Geophys. J. Int.,
147, 475– 497, doi:10.1046/j.1365-246X.2001.00539.x.
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.
Farr, T. G., et al. (2007), The Shuttle Radar Topography Mission, Rev.
Geophys., 45, RG2004, doi:10.1029/2005RG000183.
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.
Giraudi, C., and M. Frezzotti (1995), Palaeoseismicity in the Gran Sasso
Massif (Abruzzo, central Italy), Quat. Int., 25, 81–93, doi:10.1016/1040-
6182(94)P3716-L.
Goldsworthy, M., and J. Jackson (2001), Migration of activity within
normal fault systems: Examples from the Quaternary of mainland Greece,
J. Struct. Geol., 23, 489– 506, doi:10.1016/S0191-8141(00)00121-8.
Hunstad, I., G. Selvaggi, N. D’Agostino, P. England, P. Clarke, and
M. Pierozzi (2003), Geodetic strain in peninsular Italy between
1875 and 2001, Geophys. Res. Lett., 30(4), 1181, doi:10.1029/
2002GL016447.
Jonsson, S., H. Zebker, P. Segall, and F. Amelung (2002), Fault slip
distribution of the Mw 7.2 Hector Mine earthquake estimated from
satellite radar and GPS measurements., Bull. Seismol. Soc. Am., 92,
1377– 1389, doi:10.1785/0120000922.
King, G. C. P., R. S. Stein, and J. Lin (1994), Static stress changes and the
triggering of earthquakes, Bull. Seismol. Soc. Am., 84, 935–953.
Lin, J., and R. S. Stein (2004), Stress triggering in thrust and subduction
earthquakes and stress interaction between the southern San Andreas and
nearby thrust and strike-slip faults, J. Geophys. Res., 109, B02303,
doi:10.1029/2003JB002607.
Okada, Y. (1985), Surface deformation due to shear and tensile faults in a
half-space, Bull. Seismol. Soc. Am., 75, 1135– 1154.
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.
Rosen, P. A., S. Henley, G. Peltzer, and M. Simons (2004), Updated Repeat
Orbit Interferometry package released, Eos Trans. AGU, 85(5),
doi:10.1029/2004EO050004.
Tondi, E. (2000), Geological analysis and seismic hazard in the central
Apennines (Italy), J. Geodyn., 29, 517 – 533, doi:10.1016/S0264-
3707(99)00048-4.
Wright, T. J., Z. Lu, and C. Wicks (2003), Source model for the Mw 6.7, 23
October 2002, Nenana Mountain earthquake (Alaska) from InSAR,
Geophys. Res. Lett., 30(18), 1974, doi:10.1029/2003GL018014.
Subequan basins: An example of Quaternary evolution in central
Apennines, Italy, Quat. Nova, 2, 187–209.
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.
D’Agostino, N., J. A. Jackson, F. Dramis, and R. Funiciello (2001), Interactions
between mantle upwelling, drainage evolution and active normal
faulting: An example from the central Apennines (Italy), Geophys. J. Int.,
147, 475– 497, doi:10.1046/j.1365-246X.2001.00539.x.
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.
Farr, T. G., et al. (2007), The Shuttle Radar Topography Mission, Rev.
Geophys., 45, RG2004, doi:10.1029/2005RG000183.
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.
Giraudi, C., and M. Frezzotti (1995), Palaeoseismicity in the Gran Sasso
Massif (Abruzzo, central Italy), Quat. Int., 25, 81–93, doi:10.1016/1040-
6182(94)P3716-L.
Goldsworthy, M., and J. Jackson (2001), Migration of activity within
normal fault systems: Examples from the Quaternary of mainland Greece,
J. Struct. Geol., 23, 489– 506, doi:10.1016/S0191-8141(00)00121-8.
Hunstad, I., G. Selvaggi, N. D’Agostino, P. England, P. Clarke, and
M. Pierozzi (2003), Geodetic strain in peninsular Italy between
1875 and 2001, Geophys. Res. Lett., 30(4), 1181, doi:10.1029/
2002GL016447.
Jonsson, S., H. Zebker, P. Segall, and F. Amelung (2002), Fault slip
distribution of the Mw 7.2 Hector Mine earthquake estimated from
satellite radar and GPS measurements., Bull. Seismol. Soc. Am., 92,
1377– 1389, doi:10.1785/0120000922.
King, G. C. P., R. S. Stein, and J. Lin (1994), Static stress changes and the
triggering of earthquakes, Bull. Seismol. Soc. Am., 84, 935–953.
Lin, J., and R. S. Stein (2004), Stress triggering in thrust and subduction
earthquakes and stress interaction between the southern San Andreas and
nearby thrust and strike-slip faults, J. Geophys. Res., 109, B02303,
doi:10.1029/2003JB002607.
Okada, Y. (1985), Surface deformation due to shear and tensile faults in a
half-space, Bull. Seismol. Soc. Am., 75, 1135– 1154.
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.
Rosen, P. A., S. Henley, G. Peltzer, and M. Simons (2004), Updated Repeat
Orbit Interferometry package released, Eos Trans. AGU, 85(5),
doi:10.1029/2004EO050004.
Tondi, E. (2000), Geological analysis and seismic hazard in the central
Apennines (Italy), J. Geodyn., 29, 517 – 533, doi:10.1016/S0264-
3707(99)00048-4.
Wright, T. J., Z. Lu, and C. Wicks (2003), Source model for the Mw 6.7, 23
October 2002, Nenana Mountain earthquake (Alaska) from InSAR,
Geophys. Res. Lett., 30(18), 1974, doi:10.1029/2003GL018014.
Description
An edited version of this paper was published by AGU. Copyright (2009) American Geophysical Union.
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