Stress adjustment revealed by seismicity and earthquake focal mechanisms in northeast China before and after the 2011 Tohoku-Oki earthquake
文献类型：期刊论文
| 作者 | Yu, Hongyu1,2; Zhao, Li3; Liu, Yajing2; Ning, Jieyuan1; Chen, Qi-Fu4; Lin, Jian5 |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2016-01-15 |
| 卷号 | 666页码:23-32 |
| 关键词 | Seismicity Focal mechanism solutions Regional stress field Coulomb stress change Tohoku-Oki earthquake Northeast China |
| DOI | 10.1016/j.tecto.2015.10.009 |
| 文献子类 | Article |
| 英文摘要 | In order to understand the influence of the March 11, 2011, M-w 9.0 Tohoku-Oki earthquake on regional-scale seismicity, we study the seismicity rate and focal mechanism solutions (FMSs) of earthquakes in northeast China (NEC) before and after the megathrust event. Broadband seismic waveforms from 270 permanent and temporary stations are used to invert for the moment tensors of 69 earthquakes between 2009 and 2013 in the NEC. Our results show that there are distinct changes in seismicity rate on major NEC faults before and after the 2011 Tohoku-Oki event although the seismic moment rate of the whole region remains roughly constant. In comparison to a wide distribution of earthquakes before the Tohoku-Oki event, FMSs of crustal earthquakes in the NEC after the megathrust event can be categorized into two groups: strike-slip events with E-W compression and normal-faulting events with N-S extension. Stress field inversions before and after the Tohoku-Oki event suggest that the variations in seismicity and FMSs are due to a minor adjustment of regional stress state imposed by the megathrust event, which is further confirmed by static Coulomb stress change calculations. Mantle-depth seismicity is also influenced by the megathrust event, possibly via a down-dip transfer of compressional stress along the subducting plate, as manifested by the absence of moderate-sized mantle depth earthquakes (similar to Mw 4-5) between May 2011 and April 2013 and the occurrence of deep-focus events with P axes along the dip direction of the subducting Pacific Plate in E-W vertical cross-sectional view and in WNW-ESE direction in map view. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS关键词 | BAND REGIONAL SEISMOGRAMS ; M-W 9.0 ; MOMENT TENSORS ; SUBDUCTION EARTHQUAKES ; PACIFIC COAST ; INVERSION ; NETWORK ; FIELD ; DISPLACEMENTS ; DEFORMATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000375731600003 |
| 资助机构 | National Science Foundation of China(41130316) ; National Science Foundation of China(41130316) ; National Science Foundation of China(41130316) ; National Science Foundation of China(41130316) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53515]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 作者单位 | 1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 0E8, Canada 3.Acad Sinica, Inst Earth Sci, Taipei 115, Taiwan 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 5.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA |
| 推荐引用方式 GB/T 7714 | Yu, Hongyu,Zhao, Li,Liu, Yajing,et al. Stress adjustment revealed by seismicity and earthquake focal mechanisms in northeast China before and after the 2011 Tohoku-Oki earthquake[J]. TECTONOPHYSICS,2016,666:23-32. |
| APA | Yu, Hongyu,Zhao, Li,Liu, Yajing,Ning, Jieyuan,Chen, Qi-Fu,&Lin, Jian.(2016).Stress adjustment revealed by seismicity and earthquake focal mechanisms in northeast China before and after the 2011 Tohoku-Oki earthquake.TECTONOPHYSICS,666,23-32. |
| MLA | Yu, Hongyu,et al."Stress adjustment revealed by seismicity and earthquake focal mechanisms in northeast China before and after the 2011 Tohoku-Oki earthquake".TECTONOPHYSICS 666(2016):23-32. |
入库方式： OAI收割
来源：地质与地球物理研究所
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