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DOI | 10.1002/2016GL071963 |
Volumetric components in the earthquake source related to fluid injection and stress state | |
Martinez-Garzon, Patricia1; Kwiatek, Grzegorz1; Bohnhoff, Marco1,2; Dresen, Georg1,3 | |
2017-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | We investigate source processes of fluid-induced seismicity from The Geysers geothermal reservoir in California to determine their relation with hydraulic operations and improve the corresponding seismic hazard estimates. Analysis of 869 well-constrained full moment tensors (M-w 0.8-3.5) reveals significant non-double-couple components (>25%) for about 65% of the events. Volumetric deformation is governed by cumulative injection rates with larger non-double-couple components observed near the wells and during high injection periods. Source mechanisms are magnitude dependent and vary significantly between faulting regimes. Normal faulting events (M-w<2) reveal substantial volumetric components indicating dilatancy in contrast to strike-slip events that have a dominant double-couple source. Volumetric components indicating closure of cracks in the source region are mostly found for reverse faulting events with M-w>2.5. Our results imply that source processes and magnitudes of fluid-induced seismic events are strongly affected by the hydraulic operations, the reservoir stress state, and the faulting regime. |
英文关键词 | non-double-couple components induced seismicity geothermal stress state tensile opening pore pressure |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395652600025 |
WOS关键词 | DOUBLE-COUPLE EARTHQUAKES ; GEYSERS GEOTHERMAL-FIELD ; MOMENT TENSOR ; ACOUSTIC EMISSIONS ; INDUCED SEISMICITY ; FOCAL MECHANISMS ; CALIFORNIA ; INVERSION ; AREA ; RESOLUTION |
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/27904 |
专题 | 气候变化 |
作者单位 | 1.Helmholtz Ctr Potsdam, GFZ German Res Ctr Geosci Geomech & Rheol, Potsdam, Germany; 2.Free Univ Berlin, Inst Geol Sci, Berlin, Germany; 3.Univ Potsdam, Inst Earth & Environm Sci, Potsdam, Germany |
推荐引用方式 GB/T 7714 | Martinez-Garzon, Patricia,Kwiatek, Grzegorz,Bohnhoff, Marco,et al. Volumetric components in the earthquake source related to fluid injection and stress state[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(2). |
APA | Martinez-Garzon, Patricia,Kwiatek, Grzegorz,Bohnhoff, Marco,&Dresen, Georg.(2017).Volumetric components in the earthquake source related to fluid injection and stress state.GEOPHYSICAL RESEARCH LETTERS,44(2). |
MLA | Martinez-Garzon, Patricia,et al."Volumetric components in the earthquake source related to fluid injection and stress state".GEOPHYSICAL RESEARCH LETTERS 44.2(2017). |
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