It's true that when the poles do reverse, Earth's magnetic field could get weaker—but its strength is already quite variable, so that's not necessarily unusual, and there's no indication it will vanish entirely, according to NASA
During an excursion or a reversal, the magnetic field is considerably weakened and allows many more cosmic rays to reach the surface of the planet. These energetic particles from space can be damaging to life on Earth if too many reach the surface.
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Answer:
It's true that when the poles do reverse, Earth's magnetic field could get weaker—but its strength is already quite variable, so that's not necessarily unusual, and there's no indication it will vanish entirely, according to NASA
Answer:
During an excursion or a reversal, the magnetic field is considerably weakened and allows many more cosmic rays to reach the surface of the planet. These energetic particles from space can be damaging to life on Earth if too many reach the surface.
Explanation: