河南地磁短周期变化特征  

The characteristics of geom agnetic short period variations in Henan region

作　　者：姚同起[1] 范国华[1] 韩克礼[1] 

机构地区：[1]中国地震局地球物理研究所,中国北京100081

出　　处：《地震地磁观测与研究》1999年第6期15-21,共7页Seismological and Geomagnetic Observation and Research

摘　　要：为了研究河南地区地磁短周期变化的特征，１９９６ 年１０ 月至１１ 月在该地区布设了近似南北向的两条临时测线。东测线由河南信阳至汤阴， 西测线由河南西峡至山西曲沃。在测线上进行了地磁短周期变化三分量的同步观测。在３ ｍ ｉｎ 至２ ｈ 周期范围内统计计算了各测点各周期成分的地磁垂直转换函数及水平转换函数。通过地磁转换函数的分析， 给出了该地区地磁短周期变化空间， 周期分布概况。西峡至曲沃测线， 除曲沃外垂直分量没有出现反向。在灵宝和陕县测点垂直变化最大； 在灵宝以北地区有较大的北向水平分量变化。信阳至汤阴测线， 在郑州，辉县局部地区有较大的垂直分量反向变化。In order to investigate the characteristics of geom agnetic short period variations in Henan region,tw o tem porary m easurem entprofiles along nearly N-Sdirection w ere setup from Octto Nov of1996 in this region. The eastern profile w as from Xinyang to Tangyin in Henan, and another profile w as from Xixia in Henan to Quw o in Shanxi. Sim ultaneous observation of three com ponents of geom agnetic short period variations w ere carried out respectively along the tw o profiles. The geom agnetic verticaltransfer functions and hori- zontaltransfer functions ofeach period segm entateach site in the period range from 3 m in to 2 h w ere statistically calculated.Through the analysis ofthe geom agnetic transferfunc- tions, the general situation of the spatial and periodic distributions of the geom agnetic shortperiod variations w as given.In Xixia to Quw o profile,the reverse ofthe verticalvari- ations doesn't occur except Quw o, and the vertical variations have m axim um at Lingbao and Shanxian. Along the Xinyang to Tangyin Profile, the verticalvariations have larger am plitude and opposite in the localarea ofZhengzhou and Huixian.

关 键 词：河南 地磁变化 短周期变化 水平转换函数 

分 类 号：P318.21[天文地球—固体地球物理学]