| 2017年米林6.9级地震序列双差定位分析 |
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| 引用本文： | 土登次仁,王光明,格桑卓玛,次仁多吉,许亮,益西拉姆.2017年米林6.9级地震序列双差定位分析[J].地震地磁观测与研究,2018,39(6):45-49. |
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| 作者姓名： | 土登次仁 王光明 格桑卓玛 次仁多吉 许亮 益西拉姆 |
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| 作者单位： | 1.中国拉萨 850000 西藏自治区地震局;2.中国昆明 650000 云南省地震局 |
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| 摘 要： | 使用双差定位法对2017年11月18日米林6.9级地震和余震进行重新定位，得到691个地震定位结果，发现：①余震序列分布更加集中，地震序列震中呈NW-SE向分布，与雅鲁藏布江断裂在NE向构造转弯处的走向基本一致；②地震序列的震源深度主要分布在5-15 km，东南侧地震数量较少，震源深度相对较深，西北侧地震数量较多，震源深度较浅。
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| 关 键 词： | 地震精定位 震源机制解 雅鲁藏布江断裂 |
Study on double difference positioning of Milin M 6.9 earthquake sequence in 2017 |
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| Tudeng Ciren,Wang Guangming,Gesang Zhuoma,Ciren Duoji,Xu Liang,Yixi Lamu.Study on double difference positioning of Milin M 6.9 earthquake sequence in 2017[J].Seismological and Geomagnetic Observation and Research,2018,39(6):45-49. |
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| Authors: | Tudeng Ciren Wang Guangming Gesang Zhuoma Ciren Duoji Xu Liang Yixi Lamu |
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| Institution: | 1.Earthquake Agency of Tibet Autonomous, Lasa 850000, China;2.Yunnan Earthquake Agency, Kunming 650000, China |
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| Abstract: | The double difference location method was used to relocate the Milin earthquake with magnitude 6.9 on November 18, 2017 and aftershocks. The location results of 691 earthquakes were obtained. After repositioning, the distribution of the aftershock sequence is more concentrated, the epicenter of the earthquake sequence is distributed along a northwestern-southeast direction, which is basically the same as the turning direction of the northeast direction Yarlung Zangbo River Fault. The focal depth of the earthquake sequence is mainly distributed in 5-15 km, the earthquakes in the southeast side are small, the depth of the earthquake source is relatively deep, the number of earthquakes in the northwest side is large, and the depth of the earthquake source is shallow. |
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| Keywords: | earthquake relocation focal mechanism Yarlung Zangbo River Fault |
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