In low Earth orbit there is an area known as the "Space Bermuda Triangle", which is located over the South Atlantic Ocean and stretches from Chile to Zimbabwe.
Scientists have found that the magnetic field in this area is much weaker than the rest of the Van Allen radiation belt, which means that spacecraft or space stations are exposed to stronger cosmic radiation than other places when they pass through this area, such as the Japanese "Hitomi" satellite crashed due to cosmic radiation while passing through this area in 2016, and even the Hubble telescope had to turn off its electronic equipment when passing through this area.
As for the astronauts on the space station, before entering the anomaly, they sometimes go to the radiation protection module to hide, or neutralize the radiation with a water bag wall, because the hydrogen element in the liquid water can absorb radiation, but even so, the astronauts in space still receive much more radiation than people on the earth, so studying the changes of the human body in the space environment has always been a key topic for scientists.
However, as one of the few planets in the solar system with a global magnetic field, the liquid iron nickel near the earth's core has been cutting magnetic inductance lines to form a magnetic field.
The answer has to do with the shape of the earth itself
Although the Earth on the globe and the pictures of the Earth taken from space are round, the Earth itself is not a regular spherical object, it is actually an irregular sphere with slightly flattened poles and a slightly bulging equator, which will make the physical center of the Earth and the center of the magnetic field different by 500 kilometers, making it easier for cosmic radiation to approach the raised areas near the Earth's equator, including the radiation region over the South Atlantic.
However, this excess radiation can only be felt in space, because part of the space on the surface of the earth is still within the scope of the earth's magnetic field, so neither the ships on the ocean nor the people living in this area are threatened by space radiation, and only spacecraft and astronauts who are actually in space will encounter this problem.
According to NASA's current monitoring, due to the drift of the Earth's north and south magnetic poles and the possibility of reversal in the future, the anomaly area in the South Atlantic Ocean is also changing, more precisely, the magnetic field strength in this area has decreased by 15%, which means that the radiation from space has increased by 15% in this region, and from 2019 to the present, this anomaly region has a tendency to move westward, and may even split into two anomalous regions.
From the perspective of future space development, a large number of human beings will live in low earth orbit, and there will be a large number of people working and living in microgravity without considering artificial gravity, and they will pass through the radiation anomaly area again and again, thus causing various changes in the body, but for this change, the scientific community is still in the process of research, the only thing that is certain is that the space environment is definitely not the harsh environment on the earth, and compared with space, whether it is the Sahara Desert or the North and South Poles, it is considered a paradise on the earth.
Overall
Whether it is the radiation anomaly over the North Atlantic or the large-scale space development in the future, the space age is an era that will inevitably come, and although human civilization was born on the earth, it cannot live forever in the cradle of the earth.