摘要
本文利用13个全国Ⅰ类基准地磁台和3个Ⅱ类地磁台的《地磁观测报告》,通过对偏角、水平和垂直三分量日变幅值求季平均、年平均以及年滑动平均,再用各种均值点图,从而发现,(1)三分量日变幅皆有以一年为周期的季节变化和以约11年为周期的太阳黑子周变化;(2)三分量日变幅随地磁纬度的变化存在区域性,在区域内日变幅值与地磁纬度有明显的线性关系。此外,本文还对分析结果作了进一步的讨论。
The paper analyses the daily ranges of Declination, Horizontal intensity arid
vertical intensity.The data is from“Report of Geomagnetic Observation”of 16
observatories.The used methods are calculation of astronomic seasonal means,
annual means, sliding annual means and different figures.Their characteristics
of time-space variation are:
(1)Daily ranges of three components show astronomic seasonal variation at
period of one year and sunspot cycle variation at period of 11 years.
(2)The daily ranges show regional characteristic and linear variation with
geomagnetic latitude in the region.
出处
《地震地磁观测与研究》
1992年第3期73-77,共5页
Seismological and Geomagnetic Observation and Research
关键词
日变幅
均值
地磁
纬度
时空变化
Daily ranges
Mean values
Geomagnetic latitude
Time-space variation
