摘要
根据北京国家地球观象台北京地震台1987—2013年地磁观测资料,分析该台地磁场长期变化和短期变化,认为北京地磁场长期变化具有缓慢上升、缓慢下降和逐渐恢复上升的形态,短期变化受太阳黑子活动强度影响,对了解北京地区地磁场变化特征具有一定意义。
According to the data recorded by the Beijing Geomagnetic Station from 1987 to 2013, we analyze the secular and short-term variations of the geomagnetic field. We conclude that the secular variation of the geomagnetic field presents the trend of increasing, decreasing slowly and then increasing gradually again, and the short-term variation of the geomagnetic field is influenced by the activity intensity of sun spot. These variations are significant for understanding the characteristics of geomagnetic field in Beijing area.
出处
《地震地磁观测与研究》
2015年第6期43-47,共5页
Seismological and Geomagnetic Observation and Research
基金
渤海海峡跨海通道地壳稳定性调查评价(地应力)
项目编号:GZH201200504
关键词
地磁场
长期变化
短期变化
太阳黑子
日变幅
geomagnetic field
secular variation
short-term variation
sun spot
daily variation amplitude
