杨晶琼^1,,
李月芯²,
运乃丹^2,,,
周仕勇²,
杨宏峰³,
杨周胜¹,
姚远¹
1. 云南省地震局, 昆明 650224
2. 北京大学地球与空间科学学院, 北京 100871
3. 香港中文大学理学院地球系统科学课程, 香港

基金项目: 国家自然科学基金（42074046 & U2039204）资助


详细信息

作者简介: 杨晶琼, 女, 1968年生, 高级工程师, 主要从事数字地震资料分析与地震定位研究.E-mail: yjq6@163.com

通讯作者: 运乃丹, 女, 1995年生, 在读硕士生, 主要从事地震资料处理和活动性研究.E-mail: yunnaidan@pku.edu.cn

中图分类号: P315

收稿日期:2021-02-27
修回日期:2021-05-06
上线日期:2021-09-10

Dynamic earthquake triggering in the north of Xiaojiang fault zone, Yunnan

YANG JingQiong^1,,
LI YueXin²,
YUN NaiDan^2,,,
ZHOU ShiYong²,
YANG HongFeng³,
YANG ZhouSheng¹,
YAO Yuan¹
1. Yunnan Earthquake Agency, Kunming 650224, China
2. School of Earth and Space Sciences, Peking University, Beijing 100871, China
3. Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China


More Information

Corresponding author: YUN NaiDan,E-mail:yunnaidan@pku.edu.cn

MSC: P315

--> Received Date: 27 February 2021
Revised Date: 06 May 2021
Available Online: 10 September 2021


摘要
摘要:论文通过分析云南小江断裂北段（26°N—27.5°N，102.3°E—103.7°E）密集地震台阵（38个地震台组成）2012—2015年的地震记录，分别用基于频谱图的人工识别及小震目录的β统计两种触发判定标准研究远震是否对研究区域内小震活动存在动态触发.发现在研究时段内发生的36个7级以上远震中，7个存在着明显的触发现象.论文应用匹配定位法，实现了被触发小震的定位并计算了研究区域内触发潜能的分布，以及基于地震活动性变化的触发强度分布，讨论了小江断裂带北段断层应力所处状态及其对于强震危险性分析的启示.
关键词: 动态触发/
动态应力/
地震活动性/
微震检测/
触发潜能/
触发强度

Abstract:We analyze the dynamic earthquake triggering in the north of Xiaojiang Fault Zone, Yunnan (26°N-27.5°N, 102.3°E-103.7°E) based on the continuous seismograms recorded by 38 stations during 2012-2015, utilizing the manual inspection of spectrograms and β statistic of the local earthquake catalog. Seven of 36 remote earthquakes with magnitudes larger than 7.0 triggered local earthquakes in the study area. Furthermore, we use the automated approach, Match and Locate, to obtain the spatial distribution of triggered local events and then calculate the potential and intensity of dynamic triggering in the study region. We finally discuss the stress state in the North of Xiaojiang Fault Zone and the enlightenment for the analysis of strong earthquake risk.
Key words:Dynamic triggering/
Dynamic stress/
Seismicity/
Microearthquake detection/
Triggering potential/
Triggering intensity



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