However, it has recently been recorded that this magnetic field has started to weaken a bit.
Where is this happening?
The place is which this process is most visible in South America, a hole that has been named the South Atlantic anomaly. Why was this named like this? Because it spans over the heart of South America and it reaches Africa through the South Atlantic. This hole is responsible for letting radiation get closer to the Earth’s orbit.
Moreover, it makes computers that operate with Space Station technology stop working. A good example of this would be the 2016 Hitomi X-ray satellite that span out of control after it passed this gap.
A new study on this matter
There is a new study that was published in the Geophysical Research letters which addresses this matter. John Tarduno, along with a number of archaeologists, decided to look into this issue by going as far back in time as they could. They found out that this disturbance in the magnetic field has been growing for over 1000 years and that, were they to locate it, it would be approximately 2900km beneath the Earth’s surface.
They speculate that due to the size and the form of this anomaly it could be the precursor of a reversal in the magnetic field, which would make the Earth’s poles switch. They wanted to mention that if this anomaly does continue to grow, it would make one side of Earth more exposed to radiation and solar storms, a fact that would be devastating to the areas that are going to be affected.