Recent geophysical research has revealed that two colossal rocky structures deep within Earth’s mantle play a crucial role in shaping the behavior of our planet’s magnetic field. These formations, known as Large Low-Velocity Provinces (LLVPs), are located beneath Africa and the Pacific Ocean.

Although they are thousands of miles below the surface, these dense masses affect the flow of liquid iron in Earth’s outer core. Since the movement of this iron is what generates Earth’s magnetic shield, anomalies within these structures directly influence the intensity and direction of magnetic protection in different regions.

The South Atlantic Anomaly

Scientists believe that the structure located beneath the African continent may be responsible for the “South Atlantic Anomaly,” a vast region where the magnetic field is significantly weaker. This area poses a challenge for satellites and space missions, which are more exposed to cosmic radiation when flying over the zone.

Ancient Origins

One of the most fascinating theories suggests that these megastructures may be remnants of Theia, the ancient protoplanet that collided with Earth billions of years ago, resulting in the formation of the Moon. If confirmed, this discovery links Earth’s current magnetic protection to a catastrophic event that defined the early solar system.