Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-020-0553-x |
Larger tsunamis from megathrust earthquakes where slab dip is reduced | |
Oryan, Bar; Buck, W. Roger | |
2020-03-16 | |
发表期刊 | NATURE GEOSCIENCE
![]() |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
卷号 | 13期号:4页码:319-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A subset of megathrust earthquakes produce anomalously large tsunamis for their magnitude. All of these recorded 'tsunami earthquakes' in the past 50 years had extensional aftershocks in the upper plate. These include the two largest and most destructive earthquakes of that period, the 2004 Sumatra-Andaman and the 2011 Tohoku events. Evidence from the region of Tohoku indicates that normal fault slip in the upper plate during the earthquake may have contributed to the tsunami size. Here we present a numerical model that shows how a reduction of the dip of a subducting slab, on a timescale of millions of years, can result in an extensional fault failure above a megathrust earthquake on timescales of seconds to months. Slab dip reduction bends the upper plate so that the shallow part fails in extension when a megathrust rupture relieves compressional stress. This results in a distribution of extensional aftershocks comparable to that seen above the Tohoku megathrust. Volcanic arc migration and uplift data for Tohoku and several other tsunami earthquakes is consistent with slab dip reduction. The collection of more such data might identify other areas of tsunami hazard related to slab dip reduction. Tsunami generation by megathrust earthquakes is enhanced by extensional faulting in the upper plate when the subducting slab shallows, according to numerical modelling and observations from the Sumatra-Andaman and Tohoku earthquake-tsunami events. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000519843400003 |
WOS关键词 | TOHOKU-OKI EARTHQUAKE ; M-W 9.0 ; PACIFIC COAST ; NORMAL-FAULT ; FORE-ARC ; SEISMOGENIC ZONE ; SUBDUCTION ; STRESS ; SLIP ; DEFORMATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/249294 |
专题 | 地球科学 气候变化 |
作者单位 | Columbia Univ, Lamont Doherty Earth Observ, Earth Inst, Palisades, NY 10964 USA |
推荐引用方式 GB/T 7714 | Oryan, Bar,Buck, W. Roger. Larger tsunamis from megathrust earthquakes where slab dip is reduced[J]. NATURE GEOSCIENCE,2020,13(4):319-+. |
APA | Oryan, Bar,&Buck, W. Roger.(2020).Larger tsunamis from megathrust earthquakes where slab dip is reduced.NATURE GEOSCIENCE,13(4),319-+. |
MLA | Oryan, Bar,et al."Larger tsunamis from megathrust earthquakes where slab dip is reduced".NATURE GEOSCIENCE 13.4(2020):319-+. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Oryan, Bar]的文章 |
[Buck, W. Roger]的文章 |
百度学术 |
百度学术中相似的文章 |
[Oryan, Bar]的文章 |
[Buck, W. Roger]的文章 |
必应学术 |
必应学术中相似的文章 |
[Oryan, Bar]的文章 |
[Buck, W. Roger]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论