首先我将试图解释什么是地磁极逆转。磁极逆转发生在磁场减弱,直到它不再能维持本身。这可以采取1000 - 3000年或更长时间来完成所花费的时间是非常变量。经过多年与软弱,有时可变磁场。原来磁场重新出现,或改变方向。所以它不是两极移动地球的表面。链接https://en.wikipedia.org/wiki/Geomagnetic_reversal地磁磁极逆转期间会发生什么。在磁极反转地球磁场弱少所以我们的星球是宇宙辐射和太阳风的保护。链接https://en.wikipedia.org/wiki/Earth%27s_magnetic_field宇宙辐射的增加并不符合任何已知的灭绝事件发生在地球的历史。这并不意味着一无所有会发生的生活在这段时间内它只意味着危险很低。 If you want to follow how the cosmic radiation changes you can do this on the last part of this page http://spaceweather.com/ Link https://en.wikipedia.org/wiki/Cosmic_ray I mentioned in my comment Earth's magnetic north pole is really in the south. To understand how this can be true in a magnetic compass the magnetic north pole is repelled by Earth's north pole so it does point in the opposite direction (a bad explanation but it is how it works).
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