地磁绝对子夜均值年变化量空间分布特征
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摘要
选用中国21个地磁基准台站2011年的绝对子夜均值数据,分析D、H、Z分量年变化量空间分布特征。结果显示,各分量年变化量等值线分布比较均匀,其中:D分量年变化量等值线大致沿南北向分布,零经线附近台站年变化量较小;H分量年变化量等值线大致呈U型分布,且中心点位于甘肃省;Z分量年变化量等值线沿纬线方向,随纬度减小而增大。
This paper selected the absolute geomagnetic midnight average of D, H, Z component in 2011, Z components, and analysed spatial distribution of annual variations of each component absolute geomagnetic midnight average. The results showed that the spatial distribution of the annual variation contour of each component is more uniform, D component annual variation contour roughly along the north-south direction, and is smaller variation near zero longitude; H component annual variation contour is roughly U distribution,and center U in Gansu Province; Z component annual variation contour along the latitude direction, and increases with decreasing latitude.
This paper selected the absolute geomagnetic midnight average of D, H, Z component in 2011, Z components, and analysed spatial distribution of annual variations of each component absolute geomagnetic midnight average. The results showed that the spatial distribution of the annual variation contour of each component is more uniform, D component annual variation contour roughly along the north-south direction, and is smaller variation near zero longitude; H component annual variation contour is roughly U distribution,and center U in Gansu Province; Z component annual variation contour along the latitude direction, and increases with decreasing latitude.
引文
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罗玉芬,黎晓之,陆镜辉.广州地磁台地磁场长期变化的分析研究[J].防灾技术高等专科学校学报,2005,7(4):64-67.
李西京,杨冬梅,姚休义,等.地磁绝对子夜均值短周期异常数据识别方法[J].地震地磁观测与研究,2012,33(5/6):98-104.
孙旭丽.长春地磁台地磁场长期变化特征分析[J].防灾减灾学报,2013,29(3):44-48.
王新刚,唐小勇,黄建明,等.新疆地磁场变化特征的初步研究[J].地震地磁观测与研究,2008,29(6):116-119.
徐文耀.地球电磁现象物理学[M].合肥:中国科学技术大学出版社,2009.
张建国,乔子云,吕凤章,等.河北省地磁场变化规律研究[J].地震地磁观测与研究,2007,28(3):8-12.
张秀玲,范晓勇,周江林.北京地磁场变化特征分析[J].地震地磁观测与研究,2015,36(6):43-47.
张素琴,胡秀娟,何宇飞,等.F子夜均值逐日差空间异常变化与地震的关系研究[J].地震研究,2015,38(1):98-104.