Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073023 |
An 8month slow slip event triggers progressive nucleation of the 2014 Chile megathrust | |
Socquet, Anne1; Valdes, Jesus Pina1; Jara, Jorge1; Cotton, Fabrice2,3; Walpersdorf, Andrea1; Cotte, Nathalie1; Specht, Sebastian2,3; Ortega-Culaciati, Francisco4,5; Carrizo, Daniel5; Norabuena, Edmundo6 | |
2017-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Germany; Chile; Peru |
英文摘要 | The mechanisms leading to large earthquakes are poorly understood and documented. Here we characterize the long-term precursory phase of the 1 April 2014 M(w)8.1 North Chile megathrust. We show that a group of coastal GPS stations accelerated westward 8months before the main shock, corresponding to a M(w)6.5 slow slip event on the subduction interface, 80% of which was aseismic. Concurrent interface foreshocks underwent a diminution of their radiation at high frequency, as shown by the temporal evolution of Fourier spectra and residuals with respect to ground motions predicted by recent subduction models. Such ground motions change suggests that in response to the slow sliding of the subduction interface, seismic ruptures are progressively becoming smoother and/or slower. The gradual propagation of seismic ruptures beyond seismic asperities into surrounding metastable areas could explain these observations and might be the precursory mechanism eventually leading to the main shock. |
英文关键词 | seismology GPS subduction precursor |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402143700011 |
WOS关键词 | M-W 8.1 ; TOHOKU-OKI EARTHQUAKE ; IQUIQUE EARTHQUAKE ; SEQUENCE ; AFTERSHOCKS ; FORESHOCKS ; MAGNITUDE ; GPS |
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/25631 |
专题 | 气候变化 |
作者单位 | 1.Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, IRD,IFSTTAR,ISTerre, Grenoble, France; 2.GFZ Helmholtz Ctr Potsdam, German Res Ctr Geosci, Potsdam, Germany; 3.Potsdam Univ, Inst Earth & Environm Sci, Potsdam, Germany; 4.Univ Chile, Fac Phys & Math Sci, Dept Geophys, Santiago, Chile; 5.Univ Chile, Fac Phys & Math Sci, Adv Min Technol Ctr, Santiago, Chile; 6.Inst Geofis Peru, Lima, Peru |
推荐引用方式 GB/T 7714 | Socquet, Anne,Valdes, Jesus Pina,Jara, Jorge,et al. An 8month slow slip event triggers progressive nucleation of the 2014 Chile megathrust[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(9). |
APA | Socquet, Anne.,Valdes, Jesus Pina.,Jara, Jorge.,Cotton, Fabrice.,Walpersdorf, Andrea.,...&Norabuena, Edmundo.(2017).An 8month slow slip event triggers progressive nucleation of the 2014 Chile megathrust.GEOPHYSICAL RESEARCH LETTERS,44(9). |
MLA | Socquet, Anne,et al."An 8month slow slip event triggers progressive nucleation of the 2014 Chile megathrust".GEOPHYSICAL RESEARCH LETTERS 44.9(2017). |
条目包含的文件 | 条目无相关文件。 |
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