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DOI | 10.1002/2017GL075967 |
Earthquake Potential in California-Nevada Implied by Correlation of Strain Rate and Seismicity | |
Zeng, Yuehua1; Petersen, Mark D.1; Shen, Zheng-Kang2 | |
2018-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:4页码:1778-1785 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Rock mechanics studies and dynamic earthquake simulations show that patterns of seismicity evolve with time through (1) accumulation phase, (2) localization phase, and (3) rupture phase. We observe a similar pattern of changes in seismicity during the past century across California and Nevada. To quantify these changes, we correlate GPS strain rates with seismicity. Earthquakes of M > 6.5 are collocated with regions of highest strain rates. By contrast, smaller magnitude earthquakes of M >= 4 show clear spatiotemporal changes. From 1933 to the late 1980s, earthquakes of M4 were more diffused and broadly distributed in both high and low strain rate regions (accumulation phase). From the late 1980s to 2016, earthquakes were more concentrated within the high strain rate areas focused on the major fault strands (localization phase). In the same time period, the rate of M > 6.5 events also increased significantly in the high strain rate areas. The strong correlation between current strain rate and the later period of seismicity indicates that seismicity is closely related to the strain rate. The spatial patterns suggest that before the late 1980s, the strain rate field was also broadly distributed because of the stress shadows from previous large earthquakes. As the deformation field evolved out of the shadow in the late 1980s, strain has refocused on the major fault systems and we are entering a period of increased risk for large earthquakes in California. |
英文关键词 | earthquake potential GPS strain rate seismicity |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427564300009 |
WOS关键词 | FAULT-BASED MODEL ; SOUTHERN-CALIFORNIA ; CRUSTAL DEFORMATION ; FORECAST ; PATTERNS ; CATALOG ; MOMENT ; 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/27852 |
专题 | 气候变化 |
作者单位 | 1.US Geol Survey, Golden, CO 80401 USA; 2.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | Zeng, Yuehua,Petersen, Mark D.,Shen, Zheng-Kang. Earthquake Potential in California-Nevada Implied by Correlation of Strain Rate and Seismicity[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(4):1778-1785. |
APA | Zeng, Yuehua,Petersen, Mark D.,&Shen, Zheng-Kang.(2018).Earthquake Potential in California-Nevada Implied by Correlation of Strain Rate and Seismicity.GEOPHYSICAL RESEARCH LETTERS,45(4),1778-1785. |
MLA | Zeng, Yuehua,et al."Earthquake Potential in California-Nevada Implied by Correlation of Strain Rate and Seismicity".GEOPHYSICAL RESEARCH LETTERS 45.4(2018):1778-1785. |
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