DOI: 10.1016/j.epsl.2020.116445
论文题名: 3D multi-source model of elastic volcanic ground deformation
作者: Camacho A.G. ; Fernández J. ; Samsonov S.V. ; Tiampo K.F. ; Palano M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 547 语种: 英语
中文关键词: 3D model
; elastic medium
; ground deformation
; multi-source
英文关键词: Deformation
; Global positioning system
; Groundwater
; Large dataset
; Subsidence
; Volcanoes
; Deformation component
; Dislocation sources
; Global Navigation Satellite Systems
; Ground deformations
; Interferometric synthetic aperture radars
; Magmatic plumbing system
; Nonlinear approach
; Simultaneous determinations
; Synthetic aperture radar
; deformation
; GNSS
; magma
; subsidence
; synthetic aperture radar
; three-dimensional modeling
; volcano
; Catania [Sicily]
; Etna
; Italy
; Sicily
; Valle del Bove
英文摘要: Developments in Interferometric Synthetic Aperture Radar (InSAR) and GNSS (Global Navigation Satellite System) during the past decades have promoted significant advances in geosciences, providing high-resolution ground deformation data with dense spatio-temporal coverage. This large dataset can be exploited to produce accurate assessments of the primary processes occurring in geologically active areas. We present a new, original methodology to carry out a multi-source inversion of ground deformation data to better understand the subsurface causative processes. A nonlinear approach permits the determination of location, size and three-dimensional configuration, without any a priori assumption as to the number, nature or shape of the potential sources. The proposed method identifies a combination of pressure bodies and different types of dislocation sources (dip-slip, strike-slip and tensile) that represent magmatic sources and other processes such as earthquakes, landslides or groundwater-induced subsidence through the aggregation of elemental cells. This approach has the following features: (1) simultaneous inversion of the deformation components and/or line-of-sight (LOS) data; (2) simultaneous determination of diverse structures such as pressure bodies or dislocation sources, representing local and regional effects; (3) a fully 3D context; and (4) no initial hypothesis about the number, geometry or types of the causative sources is necessary. This methodology is applied to Mt. Etna (Southern Italy). We analyze the ground deformation field derived from a large InSAR dataset acquired during the January 2009 – June 2013 time period. The application of the inversion approach models several interesting buried structures as well as processes related to the volcano magmatic plumbing system, local subsidence within the Valle del Bove and seaward motion of eastern flank of the volcano. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164898
Appears in Collections: 气候变化与战略
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作者单位: Institute of Geosciences (CSIC-UCM), Facultad de Medicina, C/Doctor Severo Ochoa, 7, (Edificio entrepabellones 7 y 8, 4a planta), Ciudad Universitaria, Madrid, 28040, Spain; Canada Centre for Mapping and Earth Observation, Natural Resources Canada, 560 Rochester Street, Ottawa, ON K1A 0E4, Canada; CIRES and Geological Sciences, 216 UCB, University of Colorado, Boulder, CO 80309, United States; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo - Sezione di Catania, Piazza Roma 2, Catania, 95125, Italy
Recommended Citation:
Camacho A.G.,Fernández J.,Samsonov S.V.,et al. 3D multi-source model of elastic volcanic ground deformation[J]. Earth and Planetary Science Letters,2020-01-01,547