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百科
地磁变化 [dì cí biàn huà]
geomagnetic variation
- 在实际应用中，运用古地磁极性变化和古纬度方法对二连盆地某地区地层定年和地层界面进行识别。
It is verified that this method is effective in dating of stratum and differentiating the boundary between two different layers in the Erlian basin, northeast China. - 摘要在地电阻率各向异性、地磁垂直分量日变化幅度响应比和逐日比、地磁垂直分量北京时21点绝对值空间相关及地磁垂直分量日变化空间相关方法在江苏地区的研究结果基础上，综合分析了这些方法提取的江苏及周边地区中强震异常的综合特征，给出了这些异常在震前出现的先后次序、地震三要素与这些异常的综合关系。
Based on the research results on ground resistivity anisotropy degree, load unloading response ratio and day by day ratio of daily variation amplitude of geomagnetic vertical component, spatial correlation of absolute value of geomagnetic vertical component of Beijing 21 hour and spatial correlation of daily variation of geomagnetic vertical component, we analyze the synthetical characteristics of these anomalies before the moderate strong earthquakes and gave the order of these anomalies and the synthetical correlation of these anomalies with the three elements. - 首先分析了延时技术消除台站经度不一致造成的日变化相位差异对相关运算的影响，发现延时技术可降低相位差异的干扰，拓展参考台在经度方面的选择范围，并认为这是分钟值数字地磁资料优势之一。
Firstly, we reduced the influence of the phase difference of daily variation on the correlation caused by the disagreement of the longitude of the observatories by using delay technique, and found that the delay technique can extend the selecting range of the longitude of the reference observatories, which is considered one of the advantages the digital geomagnetic data of minutely value have.
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