北京及邻区地磁总场频谱的分析研究  

ANALYSIS ON SPECTRUM OF GEOMAGNETIC TOTAL FIELD IN BEIJING AND ITS ADJACENT AREAS

作　　者：张玉敏[1] 高金田[1] 詹志佳[1] 

机构地区：[1]中国地震局地球物理研究所,北京100081

出　　处：《西北地震学报》2004年第4期374-376,共3页Northwestern Seismological Journal

摘　　要：应用北京及邻区2min采样的地磁总场观测资料,分析了北京台与各临时台地磁总场的频谱特性与频谱幅比的时空变化。结果显示,该地区地磁总场的频谱幅度随周期增大呈下降趋势;各临时台与北京台的频谱幅比具有一定的时空变化,可能与该地区地下电磁结构、地震及构造活动有关。Based on the data of 2 min geomagnetic total field observation in Beijing and its adjacent areas,the frequency spectrum characteristic and the time-space variation of amplitude ratio of frequency spectrum for Beijing station and other 11 temporal stations are analyzed.The results show that the spectrum amplitude of geomagnetic total field in this area appears decreasing tendency with the increasing of period.The amplitude ratio of spectrum between temporal stations and Beijing station varies with time-space changes,which may be related to the underground electromagnetic structures,earthquakes and tectonic activities in this area.

关 键 词：北京地区 地磁总场 频谱 快谱分析 

分 类 号：P318.2[天文地球—固体地球物理学]