首页 | 本学科首页   官方微博 | 高级检索  
     检索      

DEMETER卫星观测到的智利7.9级地震前的电离层电磁扰动
引用本文:张学民,钱家栋,欧阳新艳,申旭辉,蔡晋安,赵庶凡.DEMETER卫星观测到的智利7.9级地震前的电离层电磁扰动[J].地球物理学进展,2009,24(4):1196-1203.
作者姓名:张学民  钱家栋  欧阳新艳  申旭辉  蔡晋安  赵庶凡
作者单位:中国地震局地震预测研究所,北京,100036
基金项目:国家科技部十一五科技支撑项目,中国地震局地震预测所基本科研业务 
摘    要:利用法国DEMETER卫星观测的电离层电磁数据,分析了2007年11月14日智利7.9级地震前10天内的电磁信号记录,结果发现在震前1周内,低频电磁扰动开始在比较宽的纬度范围内增强,震前3天异常信号幅度达到最大,并在低纬度地区尤其突出.以5天为间隔,比较分析了多参量的空间图像,发现在震前5天异常幅度和范围扩大,震中位于异常区域的边缘地带.分析认为,这次地震前的异常信号与孕震区电磁辐射信号增多及空间加热扰动有关.

关 键 词:DEMETER  卫星  电离层  电磁扰动
收稿时间:2008-9-12
修稿时间:2008-11-22

Ionospheric electromagnetic disturbances observed on DEMETER satellite before an earthquake of M7.9 in Chili
ZHANG Xue-min,QIAN Jia-dong,OUYANG Xin-yan,SHEN Xu-hui,CAI Jin-an,ZHAO Shu-fan.Ionospheric electromagnetic disturbances observed on DEMETER satellite before an earthquake of M7.9 in Chili[J].Progress in Geophysics,2009,24(4):1196-1203.
Authors:ZHANG Xue-min  QIAN Jia-dong  OUYANG Xin-yan  SHEN Xu-hui  CAI Jin-an  ZHAO Shu-fan
Institution:(InstituteofEarthquakeScience,CEA,Beijing100036,China)
Abstract:Based on the ionospheric electromagnetic data observed on satellite DEMETER of France, the ionospheric electromagnetic signals were analyzed in 10 days before the Chili 7.9 earthquake on Nov. 14, 2007. It is found that, before 1 week of this earthquake, low frequency electromagnetic disturbances began to increase on a large scale of latitude, and in three days before it, the anomalous signals reached a maximum, especially outstanding at low latitude areas. Divided in 5 days, spatial images of a few parameters were exhibited. During 5 days prior to this earthquake, the amplitude and scale of anomalies enlarged, while the epicenter is located at the boundary of the anomalous region. It is thought that these spatial anomalies may be correlated to increasing electromagnetic emissions and heating process in the earthquake preparation area.
Keywords:DEMETER  satellite    Ionosphere    Electromagnetic disturbance
本文献已被 万方数据 等数据库收录!
点击此处可从《地球物理学进展》浏览原始摘要信息
点击此处可从《地球物理学进展》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号