2017年九寨沟7级地震前电磁扰动异常分析

地震 ›› 2019, Vol. 39 ›› Issue (3): 84-94.

2017年九寨沟7级地震前电磁扰动异常分析

黄继攀^1,2,3, 王新安^1,2,3, 雍珊珊^1,2, 王墨^1,3, 刘众^1,3

1.北京大学深圳研究生院集成微系统实验室, 广东深圳 518055;
2.北京大学深圳地震监测预测研究中心, 广东深圳 518055;
3.北京大学信息科学技术学院, 北京 100871

收稿日期:2018-11-05 出版日期:2019-07-31 发布日期:2019-08-09
通讯作者: 王新安, 教授。 E-mail: anxinwang@pku.edu.cn
作者简介:黄继攀(1991-), 男, 河南商丘人, 博士研究生, 主要从事地震监测预测研究
基金资助:
深圳市科技创新计划项目(KJYY20170721151955849; JCYJ20170412151159461)

Analysis of Electromagnetic Disturbance Anomaly prior to the 2017 M_S7.0 Jiuzhaigou Earthquake

HUANG Ji-pan^1,2,3, WANG Xin-an^1,2,3, YONG Shan-shan^1,2, WANG Mo^1,3, LIU Zhong^1,3

1.The Key Laboratory of Integrated Micro-systems Science and Engineering Applications, Peking University Shenzhen Graduate School, Guangdong Shenzhen 518055, China;
2.The Research Center of Earthquake Monitoring and Forecasting Technology, Peking University Shenzhen Graduate School, Guangdong Shenzhen 518055, China;
3.School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China

Received:2018-11-05 Online:2019-07-31 Published:2019-08-09

摘要/Abstract

摘要： 地震前的电磁扰动现象曾被多次观测到, 但需进一步研究。在中国地震局的支持下, 可以监测电磁扰动数据的多分量地震监测系统AETA在中国境内已经布设了200余套。 2017年8月8日, 四川省九寨沟县发生7级地震。震中周边500 km范围内当时已经布设22套AETA设备。基于滑动四分位距法(时间窗为27 d)分析了这些台站震前30 d的数据。 11个台站出现了异常, 其中震中周边200 km内的6个台站有4个发生异常。同时, 正异常明显多于负异常。另外, 大部分异常发生在夜间(20时~6时)。

关键词: 九寨沟地震, 电磁扰动, 时间序列分析, 异常

Abstract: Electromagnetic disturbance phenomena before earthquakes have been observed for many times, however the correlation should be further studied. We designed a multi-component seismic monitoring system-AETA, to monitor the electromagnetic disturbance. At present more than 200 AETA devices have been deployed in China under the support of the Chinese Earthquake Administration. On August 8, 2017, a large M_S7.0 earthquake occurred in Jiuzhaigou county of Sichuan Province, China. There are 22 sets of devices installed at seismic stations within the 500 km range of the epicenter. We analyzed the observation data of 30 days before and after the earthquake using the sliding interquartile method and a 27-day window. The result shows that abnormal signal appeared at 11 stations. Among them, 4 out of 6 stations within 200 km around the epicenter have anomalies. And the positive anomaly is much more than the negative anomaly. Besides, most anomalies occurred during night time (20:00~6:00).

Key words: The 2017 Jiuzhaigou Earthquake, Electromagnetic Disturbance, Time-series analysis, Anomaly

中图分类号:

P315.62

黄继攀, 王新安, 雍珊珊, 王墨, 刘众. 2017年九寨沟7级地震前电磁扰动异常分析[J]. 地震, 2019, 39(3): 84-94.

HUANG Ji-pan, WANG Xin-an, YONG Shan-shan, WANG Mo, LIU Zhong. Analysis of Electromagnetic Disturbance Anomaly prior to the 2017 M_S7.0 Jiuzhaigou Earthquake[J]. EARTHQUAKE, 2019, 39(3): 84-94.

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