气候变化领域集成服务门户(CCPortal): Stick-slip vs. stable sliding fault behaviour: A case-study using a multidisciplinary approach in the volcanic region of Mt. Etna (Italy)

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DOI	10.1016/j.tecto.2020.228554
	Stick-slip vs. stable sliding fault behaviour: A case-study using a multidisciplinary approach in the volcanic region of Mt. Etna (Italy)
	Azzaro R.; Bonforte A.; D'Amico S.; Guglielmino F.; Scarfì L.
发表日期	2020
ISSN	00401951
卷号	790
英文摘要	In active volcanic zones, fault dynamics is considerably fast but it is often difficult to separate the pattern of nearly continuous large-scale volcanic processes (inflation/deflation processes, flank instability) from impulsive episodes such as dyke intrusions or coseismic fault displacements. At Etna, multidisciplinary studies on active faults whose activity does not strictly depend on volcanic processes, are relatively few. Here we present the case-study of the San Leonardello fault, an active structure located in the eastern flank of Mt. Etna characterised by a well-known seismic history. This fault saw renewed activity in May 2009, when pre-seismic creeping along the southern segment preceded an MW 4.0 earthquake in the northern segment, followed by some twenty-five aftershocks. Later, in March–April 2016, creep events reactivated the southern section of the same fault. Both the seismic and aseismic phenomena were recorded by the seismic and GNSS networks of INGV-Osservatorio Etneo, and produced surface faulting that left a footprint in the pattern of ground deformation detected by the InSAR measurements. We demonstrate that the integration of multidisciplinary data collected for volcano surveillance may shed light on different aspects of fault dynamics, and allow understanding how coseismic slip and creep alternate in space and time along the strike. Moreover, we use findings from our independent datasets to propose a conceptual model of the San Leonardello fault, taking into account behaviour and previous constraints from fault-based seismic hazard analyses. Although the faulting mechanisms described here occur at a very small scale compared with those of a purely tectonic setting, this case-study may represent a perfect natural lab for improving knowledge of seismogenic processes, also in other fault zones characterised by stick slip vs. stable-sliding fault behaviour. © 2020 Elsevier B.V.
关键词	Behaviour Creep Earthquake Fault Mt. Etna volcano Seismotectonics
英文关键词	Creep; Earthquakes; Slip forming; Stick-slip; Volcanoes; Active structures; Fault displacement; Flank instability; Ground deformations; Multi-disciplinary approach; Seismic hazard analysis; Seismogenic process; Tectonic settings; Faulting; coseismic process; deformation; fault zone; GNSS; seismic data; seismic hazard; sliding; stick-slip; synthetic aperture radar; Catania [Sicily]; Etna; Italy; Sicily
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/207711
作者单位	Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, piazza Roma 2, Catania, 95125, Italy
推荐引用方式 GB/T 7714	Azzaro R.,Bonforte A.,D'Amico S.,et al. Stick-slip vs. stable sliding fault behaviour: A case-study using a multidisciplinary approach in the volcanic region of Mt. Etna (Italy)[J],2020,790.
APA	Azzaro R.,Bonforte A.,D'Amico S.,Guglielmino F.,&Scarfì L..(2020).Stick-slip vs. stable sliding fault behaviour: A case-study using a multidisciplinary approach in the volcanic region of Mt. Etna (Italy).Tectonophysics,790.
MLA	Azzaro R.,et al."Stick-slip vs. stable sliding fault behaviour: A case-study using a multidisciplinary approach in the volcanic region of Mt. Etna (Italy)".Tectonophysics 790(2020).