Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL081607 |
Illuminating Faulting Complexity of the 2017 Yellowstone Maple Creek Earthquake Swarm | |
Shelly, David R.1; Hardebeck, Jeanne L.2 | |
2019-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:5页码:2544-2552 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The 2017 Maple Creek earthquake swarm was one of the most prolific swarms to occur in the Yellowstone region in the past few decades, with nearly 2,500 routinely detected earthquakes up to M-w 4.4 between June and September 2017. To gain insight into the mechanics and underlying mechanisms of this swarm, we enhanced the seismic catalog, detecting and precisely locating nearly 16,000 earthquakes, while estimating magnitudes for more than 30,000 events. We further utilized the cross-correlation measurements derived from this processing to determine relative polarities for event pairs and to estimate focal mechanisms for the relocated population of events. The results reveal a complex network of faults activated progressively during the swarm, which may reflect diffusion of aqueous fluid pressure through these structures. Fluid-driven earthquake sequences may naturally generate more complex faulting geometries compared to earthquake sequences dominated by stress transfer. Plain Language Summary We examine an earthquake swarm that occurred in the Yellowstone region from June to September 2017. To gain insight into the swarm, we enhanced the routine seismic catalog to include many more very small earthquakes and to precisely locate all events. In total, we located nearly 16,000 earthquakes and estimated magnitudes for more than 30,000 events. We also used a recently developed technique to estimate the orientation of slip for these earthquakes. This analysis reveals a complex spatial and temporal evolution of faulting in the earthquake swarm, which we hypothesize is related to changes in fluid (water) pressure driving the swarm. |
英文关键词 | fluids swarms earthquake location focal mechanisms |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462612900024 |
WOS关键词 | LONG VALLEY CALDERA ; 1959 HEBGEN LAKE ; FOCAL MECHANISMS ; CLUSTER-ANALYSIS ; FLUID ; MAGNITUDE ; SEISMICITY ; PERMEABILITY ; COMPLETENESS ; DEFORMATION |
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/181614 |
专题 | 气候变化 |
作者单位 | 1.US Geol Survey, Geol Hazards Sci Ctr, Golden, CO 80401 USA; 2.US Geol Survey, Earthquake Sci Ctr, 345 Middlefield Rd, Menlo Pk, CA 94025 USA |
推荐引用方式 GB/T 7714 | Shelly, David R.,Hardebeck, Jeanne L.. Illuminating Faulting Complexity of the 2017 Yellowstone Maple Creek Earthquake Swarm[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(5):2544-2552. |
APA | Shelly, David R.,&Hardebeck, Jeanne L..(2019).Illuminating Faulting Complexity of the 2017 Yellowstone Maple Creek Earthquake Swarm.GEOPHYSICAL RESEARCH LETTERS,46(5),2544-2552. |
MLA | Shelly, David R.,et al."Illuminating Faulting Complexity of the 2017 Yellowstone Maple Creek Earthquake Swarm".GEOPHYSICAL RESEARCH LETTERS 46.5(2019):2544-2552. |
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