Focal mechanism solutions of the 2014 Ludian M(s)6.5 earthquake sequence derived from multiple-bandwidth waveform fitting
文献类型：期刊论文
| 作者 | Chen JunLei6,7,8; Zheng Yong5; Zhang Lu7,8; Wu ZhenBo4; Hou Jue3,7,8; Guo GuiHong2; Liu YouShan8; Xu Tao1,8; Bat ZhiMing8 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020-04-01 |
| 卷号 | 63期号:4页码:1472-1483 |
| 关键词 | Ludian earthquake Regional waveform inversion Focal mechanisms high-dip event |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2020N0386 |
| 英文摘要 | The 2014 Ludian M(s)6.5 earthquake caused dramatic death and significant economic losses, and received much attention. Many studies have been made on the focal mechanisms of this earthquake sequence. However, due to the limitation of the inversion method and the complex structures of the seismic area, there are still some disputes on this issue, especially concerned with the dip-angle causative fault of the mainshock. In this work, we use regional seismic waveform inversion based on the gCAP method and the full waveform modeling to invert focal mechanism solutions of the mainshock and 9 aftershocks of the Ludian earthquake sequence. Results show that the azimuthal coverage has a significant effect on the reliability and stability of gCAP's inversion. To solve this problem, a two-bandwidth method is proposed in this paper, in which the bandwidths are 0. 01 similar to 0. 05 Hz and 0. 01 similar to 0. 2 Hz, respectively. With this inversion, this work determines that the dip angle and rake of the mainshock 76 degrees similar to 83 degrees and 157 degrees similar to 164 degrees, respectively, implying a high-dip strike-slip rupture. The stabilities of the gCAP method and the full waveform modeling are verified by the good consistence between the derived mechanisms of the aftershocks. Our research suggests that the high-dip character of the Ludian earthquake might lead to the fast and complete energy release, which may be the main reason for the aggravating destruction and the lack of larger aftershocks. |
| WOS关键词 | JIUZHAIGOU EARTHQUAKE ; RUPTURE PROCESS ; SEISMOGENIC ENVIRONMENT ; SOURCE PARAMETERS ; CRUSTAL VELOCITY ; SOURCE INVERSION ; MOMENT TENSORS ; POINT-SOURCE ; YUNNAN ; CHINA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000524071300018 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95550]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Chen JunLei |
| 作者单位 | 1.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China 3.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 4.Chengdu Univ Technol, Coll Geophys, Chengdu 610059, Peoples R China 5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Inst Geophys & Geomat, Wuhan 430074, Peoples R China 6.Yunnan Earthquake Agcy, Kunming 650224, Yunnan, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen JunLei,Zheng Yong,Zhang Lu,et al. Focal mechanism solutions of the 2014 Ludian M(s)6.5 earthquake sequence derived from multiple-bandwidth waveform fitting[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(4):1472-1483. |
| APA | Chen JunLei.,Zheng Yong.,Zhang Lu.,Wu ZhenBo.,Hou Jue.,...&Bat ZhiMing.(2020).Focal mechanism solutions of the 2014 Ludian M(s)6.5 earthquake sequence derived from multiple-bandwidth waveform fitting.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(4),1472-1483. |
| MLA | Chen JunLei,et al."Focal mechanism solutions of the 2014 Ludian M(s)6.5 earthquake sequence derived from multiple-bandwidth waveform fitting".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.4(2020):1472-1483. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。