100 years from now, Earth's magnetic field will reverse

The Earth's magnetic field can be reversed, which means that all human compasses must point south instead of the north as it is now, within just 100 years, much faster than previously anticipated.

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The reversal of the Earth's magnetic field has been thought to take place for thousands of years. However, a new study finds that this move can happen in just 100 years.

According to experts, Earth's magnetic field has reversed many times throughout the history of formation and development. The Earth's bipolar magnetic field, like the magnetic field of a magnet bar, remains the same for thousands to millions of years. But because of unspecified causes, they weaken and reverse the direction.

New research by international scientists from Italy, France and the United States shows that, the most recent reversal of Earth's magnetic field, 786,000 years ago, actually happened very quickly, in less than 100 years, ie the equivalent of nearly a lifetime.

The reversal of the Earth's magnetic field is thought to have a great effect on life on our planet.(Photo: ESA)

Courtney Sprain, a researcher from the University of California (USA), stressed that this is one of the most notable records in a reversal of the Earth's magnetic field. The new speed of reversal has made the research team surprised.

The discovery was published at the time when new evidence revealed, the strength of the Earth's magnetic field was declining 10 times faster than normal, leading to some geophysical experts speculating about a reversal once. in the next few thousand years.

Although magnetic field reversal is a major event across the planet, originating from convection in the Earth's iron core , we have never recorded any catastrophe involving reversed magnetic fields. before. However, at present, once such a magnetic field reversal is likely to destroy or collapse our electrical network.

And because the Earth's magnetic field protects life from solar particles and cosmic rays - factors that can mutate genes, weaken or temporarily lose from the field before a long-term reversal. , can increase the rate of cancer. The danger to life will be even greater if the reversal occurs after periods of instable magnetic field changes.

For example, the data obtained showed a sudden 180 degree rotation of the Earth magnetic field after a period of instability lasting more than 6,000 years. Stability includes both periods of weak magnetic strength, with each phase occurring for about 2,000 years.

According to Paul Renne, director of the University of California Geography Center, the new discovery will help researchers understand how and why the Earth's magnetic field reverses in stages.

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