Magnetic pole shift what will happen
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Continue or Give a Gift. Daily Planet. Flight Today. History of Flight. Virtual Space. Like this article? When the magnetic field weakens, more cosmic rays enter the atmosphere and transform certain atoms into radioactive carbon, raising levels of this isotope. By measuring the levels of carbon in each tree ring of the kauri tree, they were able to accurately date the Laschamp event.
They then used climate modelling to find that several major changes coincided with the Laschamp event. The weakened magnetic field allowed more ionising radiation from solar flares and cosmic rays from space to reach Earth.
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