DOI: 10.1016/j.earscirev.2019.03.009
论文题名: Monitoring volcano slope instability with Synthetic Aperture Radar: A review and new data from Pacaya (Guatemala) and Stromboli (Italy) volcanoes
作者: Schaefer L.N. ; Di Traglia F. ; Chaussard E. ; Lu Z. ; Nolesini T. ; Casagli N.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 192 起始页码: 236
结束页码: 257
语种: 英语
中文关键词: Collapse triggers
; Debris avalanche
; Deformation
; Ground-based InSAR
; Interferometry
; Pacaya
; Spreading
; Stromboli
英文关键词: debris avalanche
; deformation
; geomorphology
; interferometry
; slope failure
; slope stability
; synthetic aperture radar
; volcano
; Guatemala [Central America]
; Italy
; Lipari Islands
; Messina [Sicily]
; Pacaya Volcano
; Sicily
; Stromboli
英文摘要: Volcano slope instability manifests in many forms, ranging from steady state to punctuated movement, or shallow erosion to deep-seated spreading. The interplay of gravity, magmatic or hydrothermal fluids, and often active tectonics on a volcanic edifice results in complex spatial and temporal variations in deformation kinematics. While this makes the recognition, assessment, and monitoring of volcano slope instability challenging, advancements in Synthetic Aperture Radar (SAR) technology have significantly accelerated our knowledge of instability phenomena and our ability to assess their hazards. This review discusses the applications and challenges of SAR imagery to various slope instabilities at volcanoes around the world. SAR amplitude images are powerful tools for mapping areas of geomorphological changes. These snapshots can be combined using Interferometric SAR (InSAR) to create multi-temporal deformation maps that provide unique information on the evolution of slope failures. Space-borne InSAR has become an economic way to detect changes at volcanoes at very high resolution. Ground-Based InSAR (GBInSAR) can produce frequent SAR images (on the order of seconds to minutes), propelling InSAR from monitoring to surveillance and early-warning applications. However, interpreting InSAR-derived ground deformation signals related to volcano slope instability is still challenging. Deformation from magma rise or variations in hydrothermal systems may be inseparable from persistent, deep-seated flank motion. Similarly, shallow or localized ground motion may occur in overlap with thermal contraction or subsidence of newly emplaced lava or tephra deposits. If triggered to failure, landslides can vary over several magnitudes, from small-volume rock falls that pose only a localized hazard, to large-volume debris avalanches capable of travelling tens of kilometers away from the source. These collapses can have cascading hazards if accompanied by directed blasts or tsunamis, emphasizing the need for continued advancement of our understanding of these events and their consequences. To highlight the utility of SAR for measuring and monitoring mass movement, two case studies of Stromboli (Italy) and Pacaya (Guatemala) volcanoes are discussed in detail, where recent instability events, persistent volcanic activity, and ground truth constraints have resulted in excellent case-histories in applying SAR imagery to understand these potentially hazardous slope instabilities. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165924
Appears in Collections: 气候变化与战略
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作者单位: Department of Geological Sciences, University of Canterbury, Christchurch, New Zealand; Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Florence, Italy; Department of Earth Science, University of Oregon, Eugene, OR, United States; Huffington Department of Earth Sciences, Southern Methodist University, Dallas, United States; Centro per la Protezione Civile, Università degli Studi di Firenze, Florence, Italy
Recommended Citation:
Schaefer L.N.,Di Traglia F.,Chaussard E.,et al. Monitoring volcano slope instability with Synthetic Aperture Radar: A review and new data from Pacaya (Guatemala) and Stromboli (Italy) volcanoes[J]. Earth Science Reviews,2019-01-01,192