基于AETA电磁扰动对九寨沟Ms 7.0级地震的研究
2017 年 8 月 8 日中国四川省九寨沟县 Ms 7.0 级地震前,在震源 200 km 范围内的九寨沟、松潘、平武、青川、茂县和汶川布设 AETA 系统的 6 个监测台.采用窗口为 30 日的滑动主成分分析(principal component analysis,PCA)方法,对 6 个台站的电磁扰动进行特征分析,探讨九寨沟 Ms 7.0 级地震前后 AETA 系统观测的电磁场变化特征,并由此提出一种新的临震特征,即 AETA 电磁数据经滑动 PCA 方法处理后得到的"条带异常".结果显示: 1) 除九寨沟 Ms 7.0 级地震发震当日,九寨沟监测台于震前 5 日至...
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| Published in | 北京大学学报（自然科学版） Vol. 55; no. 6; pp. 1007 - 1013 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京大学深圳研究生院集成微系统科学工程与应用重点实验室,深圳,518055
20.11.2019
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0479-8023 |
| DOI | 10.13209/j.0479-8023.2019.108 |
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| Abstract | 2017 年 8 月 8 日中国四川省九寨沟县 Ms 7.0 级地震前,在震源 200 km 范围内的九寨沟、松潘、平武、青川、茂县和汶川布设 AETA 系统的 6 个监测台.采用窗口为 30 日的滑动主成分分析(principal component analysis,PCA)方法,对 6 个台站的电磁扰动进行特征分析,探讨九寨沟 Ms 7.0 级地震前后 AETA 系统观测的电磁场变化特征,并由此提出一种新的临震特征,即 AETA 电磁数据经滑动 PCA 方法处理后得到的"条带异常".结果显示: 1) 除九寨沟 Ms 7.0 级地震发震当日,九寨沟监测台于震前 5 日至震后 15 日,每天在同一时段(5:00 am—6:00 am)出现异常点,形成"异常条带",异常程度在震前大体上呈递增变化,震后大体上呈递减变化;2) 震源附近其他监测台也存在异常点,但发布零散且异常程度较小;3) 九寨沟 Ms 7.0 级地震"异常条带"消失后的两个月内,未出现新的"异常条带",且无强震发生. |
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| AbstractList | 2017 年 8 月 8 日中国四川省九寨沟县 Ms 7.0 级地震前,在震源 200 km 范围内的九寨沟、松潘、平武、青川、茂县和汶川布设 AETA 系统的 6 个监测台.采用窗口为 30 日的滑动主成分分析(principal component analysis,PCA)方法,对 6 个台站的电磁扰动进行特征分析,探讨九寨沟 Ms 7.0 级地震前后 AETA 系统观测的电磁场变化特征,并由此提出一种新的临震特征,即 AETA 电磁数据经滑动 PCA 方法处理后得到的"条带异常".结果显示: 1) 除九寨沟 Ms 7.0 级地震发震当日,九寨沟监测台于震前 5 日至震后 15 日,每天在同一时段(5:00 am—6:00 am)出现异常点,形成"异常条带",异常程度在震前大体上呈递增变化,震后大体上呈递减变化;2) 震源附近其他监测台也存在异常点,但发布零散且异常程度较小;3) 九寨沟 Ms 7.0 级地震"异常条带"消失后的两个月内,未出现新的"异常条带",且无强震发生. |
| Abstract_FL | On August 8,2017,an Ms 7.0 earthquake hit Jiuzhaigou County,Sichuan Province,China.Before the earthquake,the AETA system was equipped with 6 monitoring stations in Jiuzhaigou County,Songpan County,Pingwu County,Qingchuan County,Maoxian County and Wenchuan County of Sichuan Province within a 200 km radius of the epicenter.With sliding principal component analysis (PCA) method,whose length of time window is 30 days,we analyzed the characteristics of electromagnetic disturbance of these six stations,and discussed the co-and post-seismic changes of the electromagnetic field observed by the AETA system,and proposed a new impending seismic feature,namely the "anomaly band".The results show that except the day of Jiuzhaigou Ms 7.0 earthquake,anomalous points appeared on monitoring station of Jiuzhaigou in the same period (5:00 am–6: 00 am) from the 5th day before the earthquake to the 15th day after the earthquake,and the anomalous value generally presented the trend of increase before the earthquake and decrease after the earthquake.Although anomalous points appeared on other monitoring stations,these points were scattered and the anomaly value was low.Within Two months after the abnormal band disappeared,there were no obvious band anomaly and no strong earthquakes. |
| Author | 吕亚轩 雍珊珊 王新安 黄继攀 |
| AuthorAffiliation | 北京大学深圳研究生院集成微系统科学工程与应用重点实验室,深圳,518055 |
| AuthorAffiliation_xml | – name: 北京大学深圳研究生院集成微系统科学工程与应用重点实验室,深圳,518055 |
| Author_FL | HUANG Jipan WANG Xin’an Lü Yaxuan YONG shanshan |
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| Author_xml | – sequence: 1 fullname: 吕亚轩 – sequence: 2 fullname: 王新安 – sequence: 3 fullname: 黄继攀 – sequence: 4 fullname: 雍珊珊 |
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| DOI | 10.13209/j.0479-8023.2019.108 |
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| DocumentTitle_FL | Research on Jiuzhaigou Ms 7.0 Earthquake Based on AETA Electromagnetic Disturbance |
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| Keywords | Jiuzhaigou earthquake 滑动PCA方法 electromagnetic field 电磁场 九寨沟地震 AETA sliding principal component analysis method |
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| Snippet | 2017 年 8 月 8 日中国四川省九寨沟县 Ms 7.0 级地震前,在震源 200 km 范围内的九寨沟、松潘、平武、青川、茂县和汶川布设 AETA 系统的 6 个监测台.采用窗口为 30 日的滑动主... |
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| Title | 基于AETA电磁扰动对九寨沟Ms 7.0级地震的研究 |
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