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DOI | 10.1038/s41467-020-16408-0 |
Causal mechanism of injection-induced earthquakes through the M-w 5.5 Pohang earthquake case study | |
Yeo, I. W.1; Brown, M. R. M.2; Ge, S.3; Lee, K. K.4 | |
2020-05-26 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2020 |
卷号 | 11期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; USA |
英文摘要 | Causal mechanisms for fluid injection-induced earthquakes remain a challenge to identify. Past studies largely established spatiotemporal correlations. Here, we propose a multi-process causal mechanism for injection-induced earthquakes through a case study of the 2017 M-w 5.5 induced earthquake near Pohang Enhanced Geothermal System, Korea, where detailed hydraulic stimulation and on-site seismicity monitoring data provide an unprecedented opportunity. Pore pressure modeling reveals that pore pressure changes initiate seismicity on critically stressed faults and Coulomb static stress transfer modeling reveals that earthquake interactions promote continued seismicity, leading to larger events. On the basis of these results, we propose the following causal mechanism for induced seismicity: pore pressure increase and earthquake interactions lead to fault weakening and ultimately triggering larger earthquakes later in the process. We suggest that it is prudent that pore pressure change, initial seismicity locations, and Coulomb static stress transfer from seismicity earlier in the sequence are assessed in real-time. The authors here suggest a causal mechanism for injection-induced earthquakes. They further suggest pore pressure modeling as a practical alternative to direct in-situ pore pressure observation which can then be used for stress build-up monitoring. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000538809900004 |
WOS关键词 | INDUCED SEISMICITY ; FLUID INJECTION ; IN-SITU ; FAULT ; STRESS ; RESERVOIR ; OKLAHOMA ; PERMEABILITY ; ARCHITECTURE ; PRESSURE |
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/271708 |
专题 | 资源环境科学 |
作者单位 | 1.Chonnam Natl Univ, Dept Geol & Environm Sci, Yongbong Ro 77, Gwangju 61186, South Korea; 2.Northern Illinois Univ, Dept Geol & Environm Geosci, 1425 W Lincoln Hwy, De Kalb, IL 60115 USA; 3.Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; 4.Seoul Natl Univ, Sch Earth & Environm Sci, 1 Gwanak Ro, Seoul 08826, South Korea |
推荐引用方式 GB/T 7714 | Yeo, I. W.,Brown, M. R. M.,Ge, S.,et al. Causal mechanism of injection-induced earthquakes through the M-w 5.5 Pohang earthquake case study[J]. NATURE COMMUNICATIONS,2020,11(1). |
APA | Yeo, I. W.,Brown, M. R. M.,Ge, S.,&Lee, K. K..(2020).Causal mechanism of injection-induced earthquakes through the M-w 5.5 Pohang earthquake case study.NATURE COMMUNICATIONS,11(1). |
MLA | Yeo, I. W.,et al."Causal mechanism of injection-induced earthquakes through the M-w 5.5 Pohang earthquake case study".NATURE COMMUNICATIONS 11.1(2020). |
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