| 2020年云南巧家M_S 5.0地震震源机制解与发震断层归属 |
| |
| 引用本文： | 李文涛,党文杰,金明培,程旭东,曹舸斌,李勇.2020年云南巧家M_S 5.0地震震源机制解与发震断层归属[J].地震地磁观测与研究,2020,41(3):184-192. |
| |
| 作者姓名： | 李文涛 党文杰 金明培 程旭东 曹舸斌 李勇 |
| |
| 作者单位： | 1.中国昆明 650224 云南省地震局;2.中国昆明 650504 云南大学 |
| |
| 摘 要： | 2020年5月18日云南巧家发生M_S 5.0地震,基于国家和区域数字地震台网14个宽频带台的波形资料,利用CAP方法进行反演,得到其震源机制:节面Ⅰ:走向175°,倾角70°,滑动角-18°;节面Ⅱ:走向271°,倾角73°,滑动角-159°;震源矩心深度约9 km。结合主震震中位置、余震序列空间分布、地震烈度等值线图及区域地质背景,讨论此次巧家MS 5.0地震的发震断层,初步判定,包谷垴—小河断裂的雁列状次级隐伏构造走向SSE,具高角度左旋走滑性质,可能为其发震断层。
|
| 关 键 词： | 震源机制解 云南巧家地震 CAP方法 发震构造 |
The focal mechanism solution and seismogenic fault of the 2020 Qiaojia MS 5.0 earthquake in Yunnan |
| |
| LI Wentao,DANG Wenjie,JIN Mingpei,CHEN Xudong,CAO Gebin,LI Yong.The focal mechanism solution and seismogenic fault of the 2020 Qiaojia MS 5.0 earthquake in Yunnan[J].Seismological and Geomagnetic Observation and Research,2020,41(3):184-192. |
| |
| Authors: | LI Wentao DANG Wenjie JIN Mingpei CHEN Xudong CAO Gebin LI Yong |
| |
| Institution: | 1.Yunnan Earthquake Agency, Kunming 650224, China;2.Yunnan University, Kunming 650504, China |
| |
| Abstract: | Based on the broadband seismic records at 14 stations of national and regional digital seismic networks, we obtained the focal depth and focal mechanism solution of the MS 5.0 earthquake in Qiaojia, Yunnan, on May 18, 2020, with the Cut and Paste (CAP) method. Our result shows that the best double couple solution for the earthquake is 175°, 70°, and -18° for the strike, dip, and rake angles respectively, the other nodal plane is 271°, 73?nd -159°, and the depth of center is 9 km. Further, we analyzed the rupture characteristics and seismogenic structures of the earthquake, combining with the earthquake epicenters, aftershock sequences, seismic intensity, and regional geologic structure background. We infer that the MS 5.0 earthquake occurred on the SSE striking secondary concealed structure of the Baogunao-Xiaohe fault. It is an SSE strike high-angle left-handed strike-slip fault. |
| |
| Keywords: | focal mechanism solution Qiaojia earthquake CAP method seismogenic structure |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地震地磁观测与研究》浏览原始摘要信息 |
| 点击此处可从《地震地磁观测与研究》下载免费的PDF全文 |
|
