摘要
随着北京城市建设的发展,北京国家地球观象台地磁观测环境所受干扰日益严重。利用1985—2016年北京和红山地磁场总强度和垂直分量年均值,对比分析北京地磁场长期环境干扰变化,并选用2个台站GM4磁力仪记录的磁静日秒数据,分析北京地磁场日变化干扰振幅谱和功率谱。
With the development of Beijing’s construction,the geomagnetic observation environment of Beijing National Earth Observatory is increasingly disturbed.Based on the annual mean of the total intensity and vertical component of Beijing and Hongshan geomagnetic fields from 1985 to 2016,we analyzed the long-term environmental disturbance changes of Beijing geomagnetic field.In addition,the amplitude spectrum and power spectrum of the daily variation of Beijing geomagnetic field were estimated by the magnetically quiet daily second data recorded by the GM4 magnetometer of two stations.
作者
张秀玲
畅国平
张明东
Zhang Xiuling;Chang Guoping;Zhang Mingdong(Beijing National Observation,Institute of Geophysics,China Earthquake Administration,Beijing 100095,China;Hongshan Benchmark Seismic Station,Hebei Province 054000,China;Tianjin Earthquake Agency,Tianjin 300201,China)
出处
《地震地磁观测与研究》
2018年第6期108-113,共6页
Seismological and Geomagnetic Observation and Research
基金
中国地震局地球物理研究所基本业务专项(项目编号:DQJB18B19)
关键词
年均值
噪声
振幅频谱
功率谱
annual average value
noise
amplitude and frequency
PSD
