华南地震2011，Vol.31Issue(1)：55-65,11.
DEMETER卫星磁场波形数据分析方法初探
Discussion on the Analysis Method of Magnetic Field Waveform Data Recorded by the DEMETER Satellite
摘要
Abstract
To make full use of the magnetic-field waveform data provided by the French DEMETER (detection of electro-magnetic emissions transmitted from earthquake regions)satellite centers analyzing the seismic events, the paper introduced in detail the kurtosis evolution method, and tested the validity of the method. Then, the paper applied the method in the actual data recorded by the DEMETER satellite before and after the Wenchuan earthquake. The results show that the method can be better deal with the magnetic field waveform data recorded by DEMETER satellite; during a longer period before the earthquake occurrence, the change with time of the kurtosis of magnetic field data is relatively smooth; about 10 days before the earthquake (May 2) , there is a peak appearing in the moment when the distance between orbit and the epicenter is shortest, which indicates that there are signals of external field source involved. These phenomena persist a long time after the earthquake, for the time of peaks appearing, it is corresponding better to the Wenchuan earthquake. The analysis result of the Kp index indicates the relationship between peak phenomenon and earthquakes.关键词
DEMETER地震电磁卫星/磁场波形数据/峰度演化/汶川地震Key words
DEMETER seismo-electromagnetic satellite/ Magnetic-field waveform data/ Kurtosis evolution/ Wenchuan earthquake分类
天文与地球科学引用本文复制引用
安张辉,谭大诚,陈军营,范莹莹,刘君,解涛..DEMETER卫星磁场波形数据分析方法初探[J].华南地震,2011,31(1):55-65,11.基金项目
国家科技支撑计划(2008BAC35B01-8)和甘肃省地震局青年地震科学基金(200902)联合资助 （2008BAC35B01-8）
