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.
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张玉敏,高金田,詹志佳.北京及邻区地磁总场频谱的分析研究[J].地震工程学报,2004,26(4):374-376. Zhang Yu-min, Gao Jin-tian, Zhan Zhi-jia. ANALYSIS ON SPECTRUM OF GEOMAGNETIC TOTAL FIELD IN BEIJING AND ITS ADJACENT AREAS[J]. China Earthquake Engineering Journal,2004,26(4):374-376.