The seismicity in the southern Longmenshan fault zone based on a dense seismic array
文献类型：期刊论文
| 作者 | Huang YanLing1; Liang ChunTao1,3; Wu Jin2; Wang ChaoLiang1; Liu ZhiQiang1; Jiang NingBo1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 63期号:3页码:1183-1196 |
| 关键词 | Seismicity Seismic gap Double difference location Spatiotemporal distribution Seismic risk |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2020N0227 |
| 英文摘要 | A dense seismic array deployed around the seismic gap between the Wenchuan and Lushan earthquakes provided a continuous recording from December 2016 to April 2018. An earthquake catalogue consisting of 2227 earthquakes with complete magnitude of M-c = 0 was obtained after manually picking P and S first arrivals, locating and calculating local magnitudes. The complete catalogue carried abundant information about the spatiotemporal distribution of seismicity and earthquake hazard risk. Relocated using hypoDD, focal depths of all earthquakes range from 5 to 20 km, which is consistent with the seismogenic depth of Longmenshan fault zone. Most of events occurred in the source region of the Wenchuan and Lushan earthquakes, and the characteristics of depth expansion is similar to that of early aftershocks. At the same time, the eastward movement of the Tibetan plateau is blocked by Baoxing and Pengguan complexes, forming frequent seismic activities in the northwest side of two complexes. Relocation results clearly delineated a similar to 30 km long and similar to 20 km wide seismicity-silent zone on Wenchuan-Maoxian and Yingxiu-Beichuan fault. The seismicity deficit zone is coupled with the low-velocity zone related to partial melting. This phenomenon indicates that the heating effect of the partial melting in the lower crust is a main reason for the abnormally low seismicity. Anticorrelation between seismicity and monthly precipitation variation rate is also observed during the monitoring period, which means earthquake rates is modulated modestly by the seasonal precipitation in the study region. A comprehensive analysis with the 3D velocity model, historical strong earthquakes and b-value suggests the possibility of future earthquake risk along the middle part of Pengguan fault and neighboring blind faults to the east of seismic gap. |
| WOS关键词 | DOUBLE-DIFFERENCE RELOCATION ; 7.9 WENCHUAN EARTHQUAKE ; 2013 LUSHAN EARTHQUAKE ; FOCAL MECHANISM ; SICHUAN ; AFTERSHOCKS ; INVERSION ; GEOMETRY ; SEGMENT ; CHINA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000519847700030 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95533]  |
| 专题 | 地质与地球物理研究所_其他部门 |
| 通讯作者 | Liang ChunTao |
| 作者单位 | 1.Chengdu Univ Technol, Minist Educ, Key Lab Earth Explorat & Informat Technol, Chengdu 610059, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang YanLing,Liang ChunTao,Wu Jin,et al. The seismicity in the southern Longmenshan fault zone based on a dense seismic array[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(3):1183-1196. |
| APA | Huang YanLing,Liang ChunTao,Wu Jin,Wang ChaoLiang,Liu ZhiQiang,&Jiang NingBo.(2020).The seismicity in the southern Longmenshan fault zone based on a dense seismic array.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(3),1183-1196. |
| MLA | Huang YanLing,et al."The seismicity in the southern Longmenshan fault zone based on a dense seismic array".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.3(2020):1183-1196. |
入库方式： OAI收割
来源：地质与地球物理研究所
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