DOI: 10.1016/j.quascirev.2014.04.032
Scopus记录号: 2-s2.0-84901497604
论文题名: Why so few? Landslides triggered by the 2002 Denali earthquake, Alaska
作者: Gorum T. ; Korup O. ; van Westen C.J. ; van der Meijde M. ; Xu C. ; van der Meer F.D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 95 起始页码: 80
结束页码: 94
语种: 英语
英文关键词: Alaska
; Denali
; Earthquake
; Glacial
; Landslide
; Sediment cascade
Scopus关键词: Earthquake effects
; Earthquakes
; Landforms
; Mapping
; Sediments
; Strike-slip faults
; Alaska
; Coseismic landsliding
; Denali
; Denali fault earthquake
; Empirical predictions
; Glacial
; Multi-temporal remote sensing
; Sediment cascades
; Landslides
; coseismic process
; earthquake event
; fault propagation
; landslide
; mass wasting
; remote sensing
; seismic response
; slope failure
; Alaska
; United States
英文摘要: The 2002 Mw 7.9 Denali Fault earthquake, Alaska, provides an unparalleled opportunity to investigate in quantitative detail the regional hillslope mass-wasting response to strong seismic shaking in glacierized terrain. We present the first detailed inventory of ~1580 coseismic slope failures, out of which some 20% occurred above large valley glaciers, based on mapping from multi-temporal remote sensing data. We find that the Denali earthquake produced at least one order of magnitude fewer landslides in a much narrower corridor along the fault ruptures than empirical predictions for an M ~8 earthquake would suggest, despite the availability of sufficiently steep and dissected mountainous topography prone to frequent slope failure. In order to explore potential controls on the reduced extent of regional coseismic landsliding we compare our data with inventories that we compiled for two recent earthquakes in periglacial and formerly glaciated terrain, i.e. at Yushu, Tibet (Mw 6.9, 2010), and Aysén Fjord, Chile (2007 Mw 6.2). Fault movement during these events was, similarly to that of the Denali earthquake, dominated by strike-slip offsets along near-vertical faults. Our comparison returns very similar coseismic landslide patterns that are consistent with the idea that fault type, geometry, and dynamic rupture process rather than widespread glacier cover were among the first-order controls on regional hillslope erosional response in these earthquakes. We conclude that estimating the amount of coseismic hillslope sediment input to the sediment cascade from earthquake magnitude alone remains highly problematic, particularly if glacierized terrain is involved. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60253
Appears in Collections: 过去全球变化的重建
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作者单位: Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, 7500 AE Enschede, P.O. Box 217, Netherlands; Natural Sciences Research Center, Yildiz Technical University, Esenler, 34220 Istanbul, Turkey; Institute of Earth and Environmental Sciences, University of Potsdam, D-14476 Potsdam, Germany; Key Laboratory of Active Tectonics and Volcanoes, Institute of Geology, Chinese Earthquake Administration, Beijing 100029, China
Recommended Citation:
Gorum T.,Korup O.,van Westen C.J.,et al. Why so few? Landslides triggered by the 2002 Denali earthquake, Alaska[J]. Quaternary Science Reviews,2014-01-01,95