近年地磁场的长期变特征  

Characteristics of long term variation of geomagnetic field in recent years

作　　者：解用明[1] 高登平[2] 王艳荣[3] 鞠永[4] 韩和平[5] 郭学增[6] 郭建芳[3] 

机构地区：[1]河北省地震局,河北石家庄050021 [2]河北省地震局红山地震台,河北隆尧054000 [3]河北省地震局后土桥地震台,河北昌黎066611 [4]河北省地震局丰宁地震台,河北丰宁068350 [5]河北省地震局阳原地震台,河北阳原075800 [6]河北省地震局兴济地震台,河北沧县061021

出　　处：《华北地震科学》2007年第1期1-5,共5页North China Earthquake Sciences

摘　　要：利用红山、后土桥等台近30年的的地磁绝对观测资料,对F、H、Z各分量进行了分析,对Z分量的年速率进行了研究。结果:1999年和2000年F总场和Z分量长期变相继出现了转折,结束了逐年上升的变化趋势,但局部地区近两年有所回升。而H分量趋势没有变化,依照原来的趋势在下降;Z分量年速率的减缓变化往往与华北地区较强地震有关。The F, H and Z component of geomagnetic data observed by some seismostations in recent 30 years, such as Hongshan, Houtuqiao, are analyzed, and the annual rate of Z component is also studied. The results show ： ended the yearly ascending tendency, the long term variation of F and Z component showed a turning respectively in 1999 and 2000, but recovered a little in some local region in recent two years; with a descending tendency, the H component did not change. The slow down of variations in Z component is usually relevant to the relatively strong earthquake in North China area.

关 键 词：长期变 年速率 转折 华北地区 

分 类 号：P318.1[天文地球—固体地球物理学]