Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41467-018-06837-3 |
Gravitational body forces focus North American intraplate earthquakes | |
Levandowski, Will1; Zellman, Mark2; Briggs, Rich1 | |
2017-02-17 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Earthquakes far from tectonic plate boundaries generally exploit ancient faults, but not all intraplate faults are equally active. The North American Great Plains exemplify such intraplate earthquake localization, with both natural and induced seismicity generally clustered in discrete zones. Here we use seismic velocity, gravity and topography to generate a 3D lithospheric density model of the region; subsequent finite-element modelling shows that seismicity focuses in regions of high-gravity-derived deviatoric stress. Furthermore, predicted principal stress directions generally align with those observed independently in earthquake moment tensors and borehole breakouts. Body forces therefore appear to control the state of stress and thus the location and style of intraplate earthquakes in the central United States with no influence from mantle convection or crustal weakness necessary. These results show that mapping where gravitational body forces encourage seismicity is crucial to understanding and appraising intraplate seismic hazard. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394242000001 |
WOS关键词 | SMALL-SCALE CONVECTION ; WESTERN GREAT-PLAINS ; THERMAL-EXPANSION ; UPPER-MANTLE ; LITHOSPHERIC STRESS ; COLORADO PLATEAU ; UNITED-STATES ; FAULT SLIP ; DENSITY ; CRUSTAL |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/204048 |
专题 | 资源环境科学 |
作者单位 | 1.US Geol Survey, Geol Hazards Sci Ctr, POB 25046,DFC MS966, Denver, CO 80225 USA; 2.Fugro Consultants Inc, 1726 Cole Blvd,Suite 230, Lakewood, CO 80401 USA |
推荐引用方式 GB/T 7714 | Levandowski, Will,Zellman, Mark,Briggs, Rich. Gravitational body forces focus North American intraplate earthquakes[J]. NATURE COMMUNICATIONS,2017,8. |
APA | Levandowski, Will,Zellman, Mark,&Briggs, Rich.(2017).Gravitational body forces focus North American intraplate earthquakes.NATURE COMMUNICATIONS,8. |
MLA | Levandowski, Will,et al."Gravitational body forces focus North American intraplate earthquakes".NATURE COMMUNICATIONS 8(2017). |
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