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The Earth's magnetic field is constantly changing.
Magnetic north drifts and, every few hundred thousand years, the polarity switches so that a compass indicates the south instead of the north.
The strength of the magnetic field is also changing constantly and currently shows signs of significant weakening.
Life has existed on Earth for billions of years, during which many reversals have taken place.
There is no obvious correlation between animal extinctions and these reversals. Likewise, inversion models have no correlation with human development and evolution.
It seems that some animals, such as whales and some birds, use the Earth's magnetic field for migration and direction seeking.
Since geomagnetic inversion takes several thousand years, they may well adapt to the changing magnetic environment or develop different methods of navigation.
Ground-level radiation would increase, however, with some estimates suggesting that overall cosmic radiation exposure would double, resulting in more cancer deaths. "But only slightly," said Professor Richard Holme.
"And much less than lying on the beach in Florida for a day. So, if that were to happen, the method of protection would probably be to wear a big floppy hat. "
The movement of Earth's magnetic poles is presented in this animation at 10-year intervals from 1970 to 2020. The red and blue lines indicate the difference between magnetic north and geographic north, depending on your location. On the green line, a compass would indicate True North. Credit: NOAA National Environmental Information Centers
The collapse of the electricity grid caused by violent solar storms is a major risk. As the magnetic field continues to weaken, scientists emphasize the importance of off – grid energy systems using renewable energy sources to protect the Earth from power failure.
"Heavily charged particles can have a detrimental effect on satellites and astronauts," said Dr. Mona Kessel, a magnetosphere scientist at NASA.
IIn one area, there is evidence that a reversal is already underway. "The growing strength of the South Atlantic anomaly, a low field area above Brazil, is already a problem," said Professor Richard Holme.
The climate of the Earth could also change. A recent Danish study has revealed that the planet's magnetic field has a significant impact on weather conditions.
They claimed that fluctuations in the number of cosmic rays striking the atmosphere directly changed the amount of clouds covering the planet.
Henrik Svensmark, a meteorologist at the Danish National Space Center who led the research team, believes that the planet is experiencing a natural period of low cloud cover due to the decreasing cosmic rays entering the atmosphere.
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