DOI: 10.1016/j.jag.2017.09.001
Scopus记录号: 2-s2.0-85032222063
论文题名: Complex surface deformation of Akutan volcano, Alaska revealed from InSAR time series
作者: Wang T ; , DeGrandpre K ; , Lu Z ; , Freymueller J ; T
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 171
结束页码: 180
语种: 英语
英文关键词: Aleutian arc
; InSAR
; Volcano deformation
Scopus关键词: deformation
; Envisat
; resolution
; satellite data
; subsidence
; synthetic aperture radar
; TerraSAR-X
; volcanic earthquake
; volcanology
; Akutan Volcano
; Alaska
; Aleutian Arc
; Pacific Ocean
英文摘要: Akutan volcano is one of the most active volcanoes in the Aleutian arc. An intense swarm of volcano-tectonic earthquakes occurred across the island in 1996. Surface deformation after the 1996 earthquake sequence has been studied using Interferometric Synthetic Aperture Radar (InSAR), yet it is hard to determine the detailed temporal behavior and spatial extent of the deformation due to decorrelation and the sparse temporal sampling of SAR data. Atmospheric delay anomalies over Akutan volcano are also strong, bringing additional technical challenges. Here we present a time series InSAR analysis from 2003 to 2016 to reveal the surface deformation in more detail. Four tracks of Envisat data acquired from 2003 to 2010 and one track of TerraSAR-X data acquired from 2010 to 2016 are processed to produce high-resolution surface deformation, with a focus on studying two transient episodes of inflation in 2008 and 2014. For the TerraSAR-X data, the atmospheric delay is estimated and removed using the common-master stacking method. These derived deformation maps show a consistently uplifting area on the northeastern flank of the volcano. From the TerraSAR-X data, we quantify the velocity of the subsidence inside the caldera to be as high as 10 mm/year, and identify another subsidence area near the ground cracks created during the 1996 swarm. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79889
Appears in Collections: 气候变化事实与影响
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作者单位: Huffington Department of Earth Sciences, Southern Methodist University, Dallas, TX, United States; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States
Recommended Citation:
Wang T,, DeGrandpre K,, Lu Z,et al. Complex surface deformation of Akutan volcano, Alaska revealed from InSAR time series[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64