Spectral features of geomagnetic low point displacement and its mechanism |
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| Authors: | Xue-min Zhang Jia-dong Qian Ya-li Wang Xu Zhao Xin-yan Ouyang and Shu-fan Zhao |
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| Institution: | (1) Institute of Earthquake Science, China Earthquake Administration, Beijing, 100036, China;(2) China Earthquake Networks Center, China Earthquake Administration, Beijing, 100045, China |
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| Abstract: | In this paper,Changli station in Hebei Province was taken as an example,in which the minute data of geomagnetic Z component was used to analyze the spectral values of its main frequencies during normal time,geomagnetic storm time and low point displacement time interval respectively. After fitting of ten high spectral values to loga-rithmic functions,it is found that,by using same length of data,the spectral values at geomagnetic storm time in-crease apparently compared with those at normal time,especially ... |
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| Keywords: | geomagnetic Z component low point displacement FFT DEMETER electron density |
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