Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2990 |
Tsunamigenic structures in a creeping section of the Alaska subduction zone | |
Becel, Anne1; Shillington, Donna J.1; Delescluse, Matthias2; Nedimovic, Mladen R.1,3; Abers, Geoffrey A.4; Saffer, Demian M.5; Webb, Spahr C.1; Keranen, Katie M.4; Roche, Pierre-Henri2; Li, Jiyao1; Kuehn, Harold3 | |
2017-08-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France; Canada |
英文摘要 | Segments of subduction zones that are capable of generating tsunamigenic earthquakes appear to have characteristic structural configurations. These structures include heterogeneous plate interfaces, a small wedge of deformed sediment at the toe of the overriding plate (the frontal prism), and splay faults in the crust of the overriding plate that root within the plate boundary megathrust. Here we use seismic reflection imaging to show that these features also exist within a creeping segment of the Alaska subduction zone, the Shumagin Gap. We identify an active crustal-scale normal fault system that dips landward and resembles that involved in the 2011 Tohoku-oki earthquake in Japan. We also find that the Shumagin Gap has a small frontal prism, a deep-water splay fault, and that the plate interface here is rough and thinly sedimented. We propose that lateral propagation of rupture from a neighbouring segment into the Shumagin Gap may explain a tsunamigenic earthquake that occurred there in 1788 and that tsunamigenic potential should be considered in hazard assessments for the region. Our results demonstrate that structural configurations similar to those in Tohoku may exist in other subduction zones, including within creeping segments or segments with no record of historical megathrust earthquakes, but are under-recognized. Identifying similar configurations globally may improve our ability to anticipate regions capable of generating large tsunamis. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406641100018 |
WOS关键词 | GREAT EARTHQUAKES ; REFLECTION ; INVERSION ; DEFORMATION ; SEISMICITY ; RUPTURE ; FAULTS ; WAVE ; ARC |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35033 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 2.PSL Res Univ, Ecole Normale Super, UMR 8538, F-75231 Paris, France; 3.Dalhousie Univ, Halifax, NS B3H 4R2, Canada; 4.Cornell Univ, Ithaca, NY 14853 USA; 5.Penn State, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Becel, Anne,Shillington, Donna J.,Delescluse, Matthias,et al. Tsunamigenic structures in a creeping section of the Alaska subduction zone[J]. NATURE GEOSCIENCE,2017,10(8). |
APA | Becel, Anne.,Shillington, Donna J..,Delescluse, Matthias.,Nedimovic, Mladen R..,Abers, Geoffrey A..,...&Kuehn, Harold.(2017).Tsunamigenic structures in a creeping section of the Alaska subduction zone.NATURE GEOSCIENCE,10(8). |
MLA | Becel, Anne,et al."Tsunamigenic structures in a creeping section of the Alaska subduction zone".NATURE GEOSCIENCE 10.8(2017). |
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