地磁场倒转

地磁场倒转和长期变的理论、观测和应用以及磁性地层学；

Theory , observation and application of the geomagnetic polarity reversal and secular variation , magnetostratigraphy ;

此外，计算机模型已经在30万年的模拟过程中产生了三次地磁场的自发倒转。

In addition , the computer model has produced three spontaneous reversals of the geomagnetic field during the 300,000-year simulation .

地球内核对地磁场涨落和倒转的影响网络内？

Influence of the Earth 's inner core on geomagnetic fluctuations and reversals It seems that not all the network magnetic flux is the remnant of active region magnetic flux .

尽管在过去地质时期地磁场发生了多次倒转，但要预测下次倒转将在何时发生也还是不可能的。

Although magnetic reversals have occurred many times in the geologic past , it is not yet possible to predict when the next reversal will occur .

古地磁场强度、古地磁场极性倒转比例、古地磁场极性倒转频率和真极移速率在地史上均呈周期变化，与开合构造关系密切，同受全球性因素制约。

The intensity of palaeomagnetic field , the proportion and frequency of palaeomagnetic polarity reversal , and the rate of true polar wandering may display the periodic changes in the geological history and are closely related to the opening and closing , and may be restricted to the global factors .