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China warns of weakening magnetic field in North America, with possible impacts on radar detection
Recently, a group of scientists in China led by the teacher Fang Hanxian, National University of Defense Technology, released an alarming study: the magnetic field that protects North America is rapidly weakening.
This interest represents a concern for the world, as the geomagnetic field, responsible for blocking cosmic radiation, is bringing about an imminent “mandatory fast“However, the causes for this decrease have not yet been fully clarified.
The role of the geomagnetic field in protecting the earth
Earth is surrounded by a huge magnetic field called the magnetosphere. This field is generated by dynamic forces in the planet's core and acts as a barrier against particles transmitted from space, including solar winds and cosmic radiation.
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NASA has described the magnetosphere as a “guardian" of the Earth, responsible for repelling energies that could harm life. In addition, most of this energy is directed to safe regions, the so-called Van Allen Belts, far from the Earth's surface.
Study on the change of the magnetic field
The study by Professor Fang's team used advanced models and data to analyze changes in the strength of the magnetic field since 1900.
Scientists have identified that between 1930 and 1990, the magnetic field over North America strengthened significantly, becoming one of the most intense in the world at that time.
However, from 1990 onwards, the situation reversed, with the region's magnetic field gradually falling until reaching levels above the global average in 2020.
Causes and implications of decreasing magnetic field
The decrease in the strength of the magnetic field in North America is, according to researchers, possibly linked to the location of the geomagnetic poles from the Western Hemisphere to the Eastern Hemisphere. However, this aspect is still poorly understood.
Furthermore, while the magnetic field is weakening in the West, it is strengthening in the Eastern Hemisphere, especially over China.
This weakening could have serious implications. For example, cosmic radiation could penetrate the atmosphere more easily, impacting environmental communication systems, satellites, and even human health in less protected regions.
The shift of the magnetic poles
The Earth's magnetic poles are not static. Over the course of thousands of years, they move, and can even completely reverse their positions. This process is natural and occurs approximately every 300.000 years.
Over the past 120 years, the magnetic poles have shown a shifting trend, with the north pole moving eastward at a rate of about 10 km per year.
According to the Chinese study, this rate of movement has been increasing. Since 2000, the North Pole has been moving more than 31 miles per year.
This rapid movement of magnetic poles poses a challenge to several sectors, including the military, which uses the magnetic field for long-distance communications and radar navigation.
Spacecraft and missions also rely on the magnetic field to protect themselves from solar storms and other space threats.
What does the future hold?
The weakening of the magnetic shield over North America is a warning to the planet, as a frightening geomagnetic field can cause serious disturbances in navigation and communication systems, even impacting disruptions.
Additionally, with increased solar activity, the planet may be more vulnerable to intense solar storms, which have the potential to cause major damage. areas.
Scientists stress that there is still much to be discovered about the reasons behind these characteristics. Continuing to monitor changes in the magnetic field and better understanding their effects are key to developing mitigation and adaptation strategies.
