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摘要
Based on the SFFT-transform of one-second data of H and D components from Longyao geomagnetic observatory in 2008-2010, the amplitudes of frequency spectrum were obtained. We divided them into 5 parts according to the frequency bands of geomagnetic continuous pulsations (from Pc2 to Pc6), and then studied their temporal and spatial distribution. For temporal variation, we found that the amplitudes for different frequency bands showed similar changes in the same year and the changes were also similar with Vr index. The D-Pc and VrD showed significant seasonal variation while H-Pc and VrH did not. For spatial variation, the amplitudes increased with the increasing of geomagnetic latitude. Both the amplitudes variation and Vr index showed the same characteristics of two peaks and two valleys.
- 出版日期2012-8
- 单位中国地震局; 河北省地震局
