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The Magnetic Anomaly Growing in the South Atlantic Worries Scientists and Raises Risks for Satellites and Astronauts

Published on 15/11/2025 at 00:11
Updated on 15/11/2025 at 11:50
Pesquisadores apontam expansão rápida da Anomalia do Atlântico Sul, que enfraquece o campo magnético e aumenta riscos para satélites
Pesquisadores apontam expansão rápida da Anomalia do Atlântico Sul, que enfraquece o campo magnético e aumenta riscos para satélites
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Scientists Identify That The South Atlantic Anomaly Is Growing At Accelerated Pace, Increasing The Exposure Of Satellites And Astronauts To Radiation And Revealing Deep Changes In The Dynamics Of The Magnetic Field That Protects The Planet

A huge weak spot is expanding within the Earth’s magnetic field, and researchers warn that this advance is occurring faster than any previous projection.

The region, known as the South Atlantic Anomaly, silently grows over the South Atlantic Ocean and directly threatens satellites, onboard electronic equipment, and even astronauts.

Recent satellite data from the European Space Agency shows that the area not only persists but is accelerating its expansion, raising concerns about the impacts on space exploration.

Evidence Reinforces Continuous Expansion

A study published in the journal Physics Of The Earth And Planetary Interiors confirms that the anomaly has increased significantly over the last decade.

The results utilize measurements from the Swarm satellites, launched in 2014 by the European Space Agency to monitor the planet’s magnetic signals in real time.

Chris Finlay, a geomagnetism researcher at the Technical University of Denmark, states that the weak area has been continuously growing for 11 years.

He emphasizes that experts expected some advancement according to previous observations, but reinforces that monitoring this evolution is essential to understand how the magnetic field changes over time.

Finlay explains that the weakened region now reaches a size equivalent to half of continental Europe, revealing how dynamic the Earth’s natural shield can be.

(Image credit: ESA (Data source: Finlay, C.C. et al., 2025))

What Happens In The Depths Of The Planet

The anomaly relates to molten iron flows circulating about 2,897 km below the surface.

These complex movements generate the geomagnetic field, but scientists still do not fully understand why this specific area exhibits so much fragility.

Finlay points out that changes in these metallic flows can contribute to the magnetic imbalance, although the exact mechanisms remain unknown.

Observations reveal only that this region behaves differently from the rest of the Earth’s field.

Increasing Risk For Satellites And Astronauts

The expansion of the anomaly brings direct consequences for satellites in low Earth orbit. Finlay explains that these spacecraft face higher rates of charged particles when crossing the weak field region.

This increase can cause electronic failures, corrupt data, and even lead to total blackouts in sensitive systems.

The situation also affects astronauts. When spacecraft enter the so-called Solar Anomaly Area, energetic solar particles arrive with greater intensity, as they encounter less magnetic protection.

The International Space Station occasionally crosses this region, exposing its crew to radiation spikes that elevate risks of DNA damage and long-term cancer development.

Finlay warns that vulnerability is growing rapidly. As the weakened area expands, more satellites become exposed. Therefore, engineers are already considering it necessary to strengthen radiation protection systems in future missions.

The Variable Behavior Of The Magnetic Field

Despite the concerns, researchers claim that there are no signs that the Earth’s magnetic field is about to reverse. They consider the situation part of a long-term fluctuation caused by the movement of molten iron in the core.

The Swarm satellites have played a crucial role in recording subtle but significant changes occurring around the planet.

While the field in the South Atlantic weakens, areas in the northern Canada and Siberia show strengthening or retreat. This indicates that global magnetism remains in constant transformation.

The Importance Of Continuous Monitoring

Researchers advocate for the constant collection of accurate data to understand the evolution of the anomaly and predict risks related to space weather.

The information helps improve satellite design and exploration missions, both in Earth orbit and in more distant destinations. For them, tracking the behavior of this weak spot is essential to protect vital technologies and ensure the safety of future operations in space.

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Antonio Reinaldo Dutra Pereira Filho
Antonio Reinaldo Dutra Pereira Filho
20/11/2025 09:29

O escritor do artigo Fabio Lucas, deve atualizar esta foto do campo geomagnetico, está datada de 2014 e a ESA/ESA_EO/X divulgou uma atual de 2025 onde realmente mostra a expansão espantosa dessa anomalia.
Obrigado

Clau
Clau
16/11/2025 07:51

Geoegeneering… Olhem para os céus e encontrarão a resposta. Mas é claro que eles já sabem.

Joana
Joana
15/11/2025 14:35

Não é novidade coisas como isso acontecer, onde quem era pra preservar o mundo só destrói, a ganância, arrogância a falta de umidade, o homem é inteligente mas 90% da sua inteligência é para coisas individual e destruição, coisas piores estão para acontecer, e nada vai conseguir leva.

Clipmaster
Clipmaster
Em resposta a  Joana
16/11/2025 11:19

Esse efeito não é relacionada a atividade humana.

Silas Estefanoski
Silas Estefanoski
Em resposta a  Joana
16/11/2025 20:26

O MUNDO JÁ EXTERMINOU VÁRIAS VEZES AS CRIATURAS QUE VIVEM SOBRE SUA SUPERFÍCIE…..
NÓS TAMBÉM NÃO ESCAPAREMOSSSSS!!!!!!

Muryllo
Muryllo
Em resposta a  Silas Estefanoski
17/11/2025 14:52

Tu e loco

Fabio Lucas Carvalho

Jornalista especializado em uma ampla variedade de temas, como carros, tecnologia, política, indústria naval, geopolítica, energia renovável e economia. Atuo desde 2015 com publicações de destaque em grandes portais de notícias. Minha formação em Gestão em Tecnologia da Informação pela Faculdade de Petrolina (Facape) agrega uma perspectiva técnica única às minhas análises e reportagens. Com mais de 10 mil artigos publicados em veículos de renome, busco sempre trazer informações detalhadas e percepções relevantes para o leitor.

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