福建地区地磁短周期变化异常及其与地震活动性关系

本文利用福建地区五个地磁台站的急始型变化事件与湾扰型变化事件的资料进行统计分析,讨论地磁短周期垂直分量变化ΔZ 的空间分布,分析了短周期变化异常的频率特性,并应用最小二乘法计算泉州台的转换函数,给出了泉州台Wiese矢量及其逐年演变情况,探讨了地磁短周期变化异常与地热异常和地震活动性的关系。

ANOMALIES OF GEOMAGNETIC SHORT-PERIOD VARIATIONS IN FUJIAN PROVINCE AND ITS RELATION TO SEISMICITY

It is geophysically important to study the anomalies of geomagneticshort-period variations for understnading the distribution of undergroundconductivity and the structure background of seismic active areas.This paper statistically analyses the data of S.C.events and bay dis-turbances from five stations in Fujian province,It also discusses the spacedistribution of the vertical component range △Z in geomagnetic short-periodvariations,as well as the frequency feature of the anomalies of short-pe-riod variations.The authors calculated the transfer function in Quanzhougeomagnetic station,using the least square method,and presented the an-nual evolution of Wiese vector in Quanzhou station.The relation betweenthe anomalies of geomagnetic short-period variation and the geothermalanomalies and seismicity has also been studied.