| 2022年门源MS 6.9地震序列特征及强余震判定 |
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| 引用本文： | 余娜,张晓清,胡维云.2022年门源MS 6.9地震序列特征及强余震判定[J].地震地磁观测与研究,2022,43(4):15-22. |
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| 作者姓名： | 余娜 张晓清 胡维云 |
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| 作者单位： | 中国西宁 810000 青海省地震局 |
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| 基金项目： | 青海省科技成果转化专项（项目编号；2021-SF-151） |
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| 摘 要： | 2022年1月8日青海门源发生MS 6.9地震，基于青海地震台网对此次地震序列时空演化特征进行分析。结果表明，门源地震序列的空间展布整体上呈西段NWW、东段SE向的带状分布，且序列衰减较缓慢。另外，基于同一构造历史地震类比、h值、等待时间法等进行分析，认为门源MS 6.9地震序列为主—余型；根据祁连地震带中东段5级以上地震最大余震发震时间统计和震级差特征分析认为，门源MS 6.9地震的最大余震已经发生，即2022年1月12日18时20分的MS 5.2地震。
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| 关 键 词： | 门源MS 6.9地震 地震序列 强余震 |
Characteristics of the 2022 Menyuan MS 6.9 earthquake sequence and prediction of its strong aftershocks |
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| YU Na,ZHANG Xiaoqing,HU Weiyun.Characteristics of the 2022 Menyuan MS 6.9 earthquake sequence and prediction of its strong aftershocks[J].Seismological and Geomagnetic Observation and Research,2022,43(4):15-22. |
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| Authors: | YU Na ZHANG Xiaoqing HU Weiyun |
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| Institution: | Qinghai Earthquake Agency, Xining 810000, China |
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| Abstract: | On January 8, 2022, an earthquake with magnitude of 6.9 struck Menyuan city of Qinghai, and we analyze the temporal and spatial evolution characteristics of sequence using data recorded by Qinghai Earthquake Network. Results show that the distribution of Menyuan earthquake sequence is NWW of the west segment, southeast of the east segment to the zonal distribution, and the sequence decays slowly. Through comparing with historical earthquake sequences in the same tectonic, analyzing by the method of h-value and the method of dt-t, we determine that the Menyuan MS 6.9 earthquake sequence belongs to mainshock-aftershock type. According to the statistics of the original time of the strongest aftershock of historical earthquakes in Qilian seismic belt and the distribution characteristics of the magnitude differences, we conclude that the strongest aftershock of the Menyuan MS 6.9 earthquake has occurred, which is the MS 5.2 earthquake at 18:20 on January 12, 2022. |
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| Keywords: | The Menyuan MS 6 9 earthquake seismic sequences strong aftershocks |
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