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[1]赵小艳,王光明,张 潜,等.2021年云南漾濞MS6.4地震序列特征及强余震判定[J].地震研究,2021,44(03):309-319.
　ZHAO Xiaoyan,WANG Guangming,ZHANG Qian,et al.Characteristics of the 2021 Yangbi,Yunnan MS6.4 Earthquake Sequence and Prediction of Its Strong Aftershocks[J].Journal of Seismological Research,2021,44(03):309-319.
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2021年云南漾濞MS6.4地震序列特征及强余震判定(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
44
期数:
2021年03期
页码:
309-319
栏目:
出版日期:
2021-10-20

文章信息/Info

Title:
Characteristics of the 2021 Yangbi,Yunnan MS6.4 Earthquake Sequence and Prediction of Its Strong Aftershocks
作者:
赵小艳; 王光明; 张 潜; 贺素歌; 樊文杰; 刘自凤
(云南省地震局,云南 昆明 650224)
Author(s):
ZHAO Xiaoyan; WANG Guangming; ZHANG Qian; HE Suge; FAN Wenjie; LIU Zifeng
(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)
关键词:
漾濞MS6.4地震;  地震序列;  强余震
Keywords:
the Yangbi MS6.4 earthquake;  seismic sequences;  strong aftershocks
分类号:
P315.72
DOI:
-
摘要:
利用云南地震台网观测资料,对2021年漾濞MS6.4地震序列的时空演化特征进行分析,结果表明:漾濞地震序列的空间展布可分为4段,且余震活动衰减非常迅速。通过分析历史地震序列类型、h值、等待时间法、累计频次曲线、初动方向等,判断漾濞MS6.4地震序列为前震-主震-余震型。利用云南地区6级地震最大余震发震时间统计和震级差分布特征分析,认为漾濞MS6.4地震最大余震已经发生。最后讨论了漾濞地震序列4级余震偏多的现象及可能的原因。
Abstract:
On the basis of the data of the 2021 Yangbi MS6.4 earthquake sequence recorded by the Yunnan Earthquake Observation Network,we analyze the temporal and spatial evolution characteristics of the sequence.The spatial distribution of the sequence can be divided into 4 sections and the aftershock-activity attenuate rapidly.Through the analysis of the type of the historical earthquake sequences in this area,the method of h-value,the method of dt-t,the method of the cumulative frequency,and first-motion signs of the earthquake wave,we determine that the Yangbi MS6.4 earthquake sequence belongs to foreshock-mainshock-aftershock type.According to the statistics of the original time of the historical strongest aftershocks in Yunnan,and the distribution characteristics of the magnitude differences,we conclude that the strongest aftershock of the Yangbi MS6.4 earthquake has occurred.Finally we discuss the high frequency of ML≥4.0 aftershocks in the sequence and the possible reasons.

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备注/Memo

备注/Memo:
收稿日期:2021-07-01
基金项目:2019-2023年预防和处置地震灾害能力建设重点任务和中国地震局震情跟踪项目联合资助.

更新日期/Last Update: 2021-10-20