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The planet we live on is undergoing significant changes over the years and centuries, not only in the climate, but also in the magnetic field.
The Earth's magnetic field is not only useful for helping us identify the North and South poles, it also protects the Earth from solar wind and cosmic radiation.
If the Earth's magnetic field continues to decline at the current rate, the planet could see a second-round coupling.
Some people think this is not happening quickly – the last time our planet witnessed this significant change 780,000 years ago.
Scientists are currently interested in a strange phenomenon called "South Atlantic Anomaly" in the South Atlantic, located between Chile and Zimbabwe.
The magnetic field in this area has shrunk so much that the scientific community is concerned that the satellites will be damaged if the focal point is entered due to the radiation caused by the contraction of the magnetic field.
According to some scientific theories of terrestrial magnetism, our planet contains many deposits of iron ore, some of which are almost pure iron.
It is probable that these deposits of iron were "magnetized" in ancient times, gradually in one direction, and constituted a permanent magnet and very large.
In the meantime, other theories consider that the magnetism on Earth is due to the presence of strong currents in the electric fluid of the heart of the Earth.
The source of the Earth's main magnetic field is at our feet at a depth of 3,000 km. Iron and nickel, in the case of fusion at the planet's nucleus, form a kind of dynamo, mainly because of currents that penetrate it.
In addition, other less important sources are added, including magnetized rocks in the Earth's crust, and external factors, including parts of the atmosphere, are electrically charged for their interaction with solar radiation, explains Gauthier Hollow, researcher at the Institute of Geophysics, Paris.
Scientists do not know for the moment whether this polarization will occur in the future, especially because researchers do not find that important data can be studied to predict what will happen.
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