Jun 25, 2020
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Mysterious anomaly weakens Earth’s magnetic field – World News

Mysterious anomaly weakens Earth's magnetic field

Scientists have received new evidence of the weakening of the Earth's magnetic field, which protects us from cosmic radiation and the solar wind.

And so much so that they began to talk about the fact that after some time the magnetic field could turn over, and the poles of the planet would change places.

This, by the way, has happened before. The last time the inversion was about 780,000 years ago. But scientists are reassuring: even if this polarity reversal does occur in the future, it will not occur quickly, but over several thousand years.

Of particular interest to researchers at the moment is the growth of a huge region of minimal field intensity between Africa and South America, called the South Atlantic Anomaly. Here the strength of the Earth’s magnetic field is so weak that it poses a threat to the operation of satellites and other spacecraft, there is a threat of their complete failure. An anomaly has formed rapidly over the past five years.

The alarm was struck by the European Space Agency, whose satellites measure the strength of the Earth's magnetic field and increasingly record its weakening. The German Geophysical Research Center cannot yet explain the reason for the spread of the anomaly in Africa and determine the further course of this process.

Over the past 200 years, the strength of the Earth's magnetic field has decreased by 9 percent. But most worrying is the speed with which the South Atlantic anomaly developed. Attention switches to the study of processes in the earth's core, which affects changes in the magnetic field.

The South Atlantic anomaly moves west at a speed of about 12 miles per hour. A center of minimum field intensity has now formed in the region of South West Africa. Phil Livermore, a professor of geophysics at the University of Leeds, said that such a behavior of the magnetic field and especially the accelerated “flight” of the North Pole to Siberia had not yet been observed. It is assumed that the pole will continue its “Siberian route”. At the same time, the South Pole has hardly moved over the past 100 years.

Nikolay Ivanov.


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