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DOI	10.1016/j.tecto.2020.228685
	Three-dimensional numerical simulation of the interseismic and coseismic phases associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake (Central Italy)
	Albano M.; Barba S.; Bignami C.; Carminati E.; Doglioni C.; Moro M.; Stramondo S.; Saroli M.
发表日期	2021
ISSN	00401951
卷号	798
英文摘要	Although several observations have been reported in the literature before a strong earthquake, their relation with the forthcoming event is often controversial. Since many physical processes and parameters govern the dynamics of preparation, initiation, and occurrence of earthquakes, their understanding is essential for explaining anomalous seismological, geophysical, hydrological and geodetic signals before a strong earthquake that may be considered for seismic monitoring and hazard assessment. In this work, the interseismic and coseismic stress and strain fields associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake are calculated via a 3D numerical model designed to simulate the crustal interseismic loading and the coseismic brittle episodic dislocation along the fault. The model adopts a framework of gravitational and tectonic forces that are compatible with the geodynamics of the Central Apennines region of the Italian territory. The model assumes a brittle upper crust, where the fault has stick-slip behaviour, and a plastic deeper crust, where the fault is in stationary creep. The results indicate that the concurrent action of gravitational and tectonic forces determines steep interseismic stress gradients at the transition between the creeping and locked fault planes that promote the coseismic subsidence of the hanging wall. The interseismic strain above the transition between that locked upper fault and its unlocked lower shear zone develops a dilated volume in the hanging wall and a contracted volume in the footwall. These stress and strain variations are compatible with seismological, geophysical and geodetic anomalies observed before the earthquake, i.e., Vp/Vs anomalies and location of foreshocks. Interseismic stress and strain patterns invert during the coseismic stage. The dilated volume, formed during the interseismic phase, will be contracted at the coseismic stage and, conversely, the footwall volume previously contracted will be expanded. © 2020
关键词	Coulomb stress Dilatancy Gravitational force InSAR L'Aquila earthquake Numerical model Tectonic force
英文关键词	3D modeling; Faulting; Geodesy; Geodynamics; Numerical models; Slip forming; Stick-slip; 3-D numerical modeling; Central Apennines; Hazard Assessment; L'aquila earthquakes; Seismic monitoring; Stress and strain; Strong earthquakes; Three-dimensional numerical simulations; Earthquakes; computer simulation; coseismic process; earthquake event; earthquake magnitude; earthquake mechanism; fault zone; hazard assessment; interferometry; numerical model; seismic hazard; seismicity; strong motion; synthetic aperture radar; tectonic setting; three-dimensional modeling; Abruzzi; Apennines; Italy; L'Aquila; Aquila
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207933
作者单位	Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna murata 605, Roma, 00143, Italy; Dipartimento di Scienze della Terra, “Sapienza” Università di Roma, Piazzale Aldo Moro 5, Roma, 00185, Italy; Dipartimento di Ingegneria Civile e Meccanica, Università degli Studi di Cassino e del Lazio meridionale, via G. di Biasio 43, Cassino (FR), 03043, Italy
推荐引用方式 GB/T 7714	Albano M.,Barba S.,Bignami C.,et al. Three-dimensional numerical simulation of the interseismic and coseismic phases associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake (Central Italy)[J],2021,798.
APA	Albano M..,Barba S..,Bignami C..,Carminati E..,Doglioni C..,...&Saroli M..(2021).Three-dimensional numerical simulation of the interseismic and coseismic phases associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake (Central Italy).Tectonophysics,798.
MLA	Albano M.,et al."Three-dimensional numerical simulation of the interseismic and coseismic phases associated with the 6 April 2009, Mw 6.3 L'Aquila earthquake (Central Italy)".Tectonophysics 798(2021).