DOI: 10.1016/j.tecto.2020.228554
论文题名: Stick-slip vs. stable sliding fault behaviour: A case-study using a multidisciplinary approach in the volcanic region of Mt. Etna (Italy)
作者: Azzaro R. ; Bonforte A. ; D'Amico S. ; Guglielmino F. ; Scarfì L.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 790 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170545
Appears in Collections: 气候变化与战略
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作者单位: Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, piazza Roma 2, Catania, 95125, Italy
Recommended Citation:
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]. Tectonophysics,2020-01-01,790