The IKI RAS explained the weakening of the Earth's magnetic field in the Atlantic

The weakening of the Earth's magnetic field in the South Atlantic region is due to differences in the magnetic and geographical axes of the planet. This phenomenon is not dangerous and is predictable, although it demonstrates the variability of the Earth's magnetic shield. This was announced on October 14 by the head of the Laboratory of Solar Astronomy at the Institute of Space Research (IKI). RAN Sergey Bogachev.

"Due to the fact that the Earth's magnetic axis is tilted to the geographical one, it turns out that in the Brazilian region the magnetic field is more strongly pressed to the Earth's surface than in other regions. This is called the Brazilian anomaly," he told RIA Novosti.

According to him, in this area, the Earth's radiation belts pass closer to the surface, which increases the radiation load on spacecraft passing through these latitudes.

However, the scientist noted that changes in the magnetic field are associated with the movement of the Earth's magnetic poles. While the situation in Brazil is getting worse, in the opposite part of the planet, in Siberia, the magnetic field is improving. This, according to Bogachev, can be positive for Europe and Asia.

For Brazil, as the scientist noted, this phenomenon does not pose a threat. According to him, the magnetic field is not the only protection against charged particles, its role is also played by the atmosphere, which is not affected by these changes. Bogachev added that despite the intensification of solar flares in recent decades, the Earth's atmosphere is quite capable of coping with this load.

He stressed that the weakening of the magnetic field is still moderate and predictable, but it demonstrates that the Earth's magnetic shield is subject to evolutionary changes over relatively short time intervals.

Magnetic storms in October 2025: daily forecast, human impact

On October 13, the European Space Agency (ESA) reported a significant expansion of the South Atlantic Anomaly, an area with a weakened magnetic field, claiming that unusual processes are taking place there, affecting satellites flying over the region. According to ESA, this poses additional risks to the operation of critical equipment, as well as electricity.

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