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DOI	10.1016/j.tecto.2021.228797
	The influence of subsurface geology on the distribution of earthquakes during the 2016-–2017 Central Italy seismic sequence
	Barchi M.R.; Carboni F.; Michele M.; Ercoli M.; Giorgetti C.; Porreca M.; Azzaro S.; Chiaraluce L.
发表日期	2021
ISSN	00401951
卷号	807
英文摘要	In 2016–2017, a destructive sequence of earthquakes affected a wide portion of Central Italy, activating a complex, 80-km long system of SW-dipping normal faults and causing impressive surface faulting and widespread damage. Former studies providing reconstructions of the fault systems activated during this sequence, are mostly based on high-resolution seismological and geodetic data. In this paper, we integrate surface and subsurface geological data with the ones obtained by an irregular network of seismic reflection profiles, aimed at providing a comprehensive reconstruction of the subsurface lithologies and structures in this area. We have constructed a set of five geological cross-sections, passing through the mainshock epicentral areas (Mw > 5.5) of the seismic sequence. The cross-sections are extrapolated down to a depth of ca. 12 km, along which we have plotted relocated seismicity. Combined geological and seismological data support a new 3D seismotectonic model, illustrating the propagation through time and space of the seismic ruptures during the sequence. Our results show that the litho-mechanical stratigraphy exerted a primary control on the distribution of seismicity, as it is mostly hosted in the more competent lithologies (i.e. the Late Triassic-Paleogene succession, consisting of carbonates and evaporites). In addition, we illustrate the crucial role played by the inherited compressional structures in determining the lateral and vertical variations of the rheological properties of the upper crust and, eventually, the overall geometry and segmentation of the seismogenic extensional system. The workflow proposed here can be applied to other seismogenic zones throughout the world, since reliable seismotectonic models require an accurate reconstruction of the subsurface geological setting, based on a close integration of geological, geophysical and seismological data. © 2021 The Authors
关键词	Apennines Normal faults Seismic reflection profiles Seismotectonics
英文关键词	3D modeling; Faulting; Stratigraphy; Structural geology; Geological setting; Irregular networks; Mechanical stratigraphy; Rheological property; Seismic reflection profiles; Subsurface geology; Subsurface lithology; Vertical variation; Earthquakes; earthquake event; faulting; normal fault; reconstruction; seismic property; seismic reflection; seismicity; seismotectonics; Apennines; Italy
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/207942
作者单位	Dipartimento di Fisica e Geologia, Università degli Studi di Perugia (CRUST Member, Centro interUniversitario per l'analisi SismoTettonica Tridimensionale Con Applicazioni Territoriali); Istituto Nazionale di Geofisica e Vulcanologia
推荐引用方式 GB/T 7714	Barchi M.R.,Carboni F.,Michele M.,等. The influence of subsurface geology on the distribution of earthquakes during the 2016-–2017 Central Italy seismic sequence[J],2021,807.
APA	Barchi M.R..,Carboni F..,Michele M..,Ercoli M..,Giorgetti C..,...&Chiaraluce L..(2021).The influence of subsurface geology on the distribution of earthquakes during the 2016-–2017 Central Italy seismic sequence.Tectonophysics,807.
MLA	Barchi M.R.,et al."The influence of subsurface geology on the distribution of earthquakes during the 2016-–2017 Central Italy seismic sequence".Tectonophysics 807(2021).