Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-018-0120-x |
An updated stress map of the continental United States reveals heterogeneous intraplate stress | |
Levandowski, Will1,3; Herrmann, Robert B.2; Briggs, Rich1; Boyd, Oliver1; Gold, Ryan1 | |
2018-06-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:6页码:433-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Knowledge of the state of stress in Earth's crust is key to understanding the forces and processes responsible for earthquakes. Historically, low rates of natural seismicity in the central and eastern United States have complicated efforts to understand intraplate stress, but recent improvements in seismic networks and the spread of human-induced seismicity have greatly improved data coverage. Here, we compile a nationwide stress map based on formal inversions of focal mechanisms that challenges the idea that deformation in continental interiors is driven primarily by broad, uniform stress fields derived from distant plate boundaries. Despite plate-boundary compression, extension dominates roughly half of the continent, and second-order forces related to lithospheric structure appear to control extension directions. We also show that the states of stress in several active eastern United States seismic zones differ significantly from those of surrounding areas and that these anomalies cannot be explained by transient processes, suggesting that earthquakes are focused by persistent, locally derived sources of stress. Such spatially variable intraplate stress appears to justify the current, spatially variable estimates of seismic hazard. Future work to quantify sources of stress, stressing-rate magnitudes and their relationship with strain and earthquake rates could allow prospective mapping of intraplate hazard. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433901600017 |
WOS关键词 | MADRID SEISMIC ZONE ; EARTHQUAKE FOCAL MECHANISMS ; NORTH-AMERICAN PLATE ; REGIONAL STRESS ; MANTLE FLOW ; DEFORMATION ; CRUSTAL ; US ; LITHOSPHERE ; ORIENTATION |
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/34794 |
专题 | 地球科学 气候变化 |
作者单位 | 1.USGS, Golden, CO 80401 USA; 2.St Louis Univ, St Louis, MO 63103 USA; 3.Colorado Coll, Colorado Springs, CO 80903 USA |
推荐引用方式 GB/T 7714 | Levandowski, Will,Herrmann, Robert B.,Briggs, Rich,et al. An updated stress map of the continental United States reveals heterogeneous intraplate stress[J]. NATURE GEOSCIENCE,2018,11(6):433-+. |
APA | Levandowski, Will,Herrmann, Robert B.,Briggs, Rich,Boyd, Oliver,&Gold, Ryan.(2018).An updated stress map of the continental United States reveals heterogeneous intraplate stress.NATURE GEOSCIENCE,11(6),433-+. |
MLA | Levandowski, Will,et al."An updated stress map of the continental United States reveals heterogeneous intraplate stress".NATURE GEOSCIENCE 11.6(2018):433-+. |
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