利用第10代国际参考地磁场模型(IGRF)的资料，研究了地磁位的谐波振幅的纬度分布及其时间变化。
Using the 10th International geomagnetic Reference Field (IGRF) models, the latitudinal distribution of harmonic amplitude and its time-variation of geomagnetic potential are investigated.
与此同时，我们还统计了1957与1958年高纬度区31个地磁台在平静时每天的平均日变化。
We have also calculated the mean daily variation of K index of 31 stations of high latitude during the relative magnetic quiet period of year 1957 and 1958.
本文主要依据三水盆地古地磁数据所反映的华南地块的古纬度漂移讨论南海的演化模式。
In this paper, the authors discuss the evolutionary model of the South China Sea based on the data of Sanshui Basin which indicate the paleolatitude migration of South China.
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