The map defines what is known as a pole path.请问pole path

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The map defines what is known as a pole path.请问pole path

The map defines what is known as a pole path.请问pole path
The map defines what is known as a pole path.请问pole path

The map defines what is known as a pole path.请问pole path
南北的地磁极(magnetic pole)总是在移动着.所以,太古时代熔岩等凝结的时候,里面的含铁矿物的磁场可能是指着跟现在地磁极不一样的方向凝结下来的.用这种地质数值,可以构拟出地磁极移动的“道”,那就是所谓的“pole path”.