NASA has been monitoring a peculiar anomaly in Earth’s magnetic field, known as the South Atlantic Anomaly (SAA). This vast region of lower magnetic intensity stretches between South America and southwest Africa.
The SAA is particularly concerning for satellites and spacecraft, including the International Space Station, which pass through it during low-Earth orbit. The reduced magnetic field strength can cause technological systems to malfunction or even permanently damage key components.
Scientists believe that the primary source of the anomaly is a swirling ocean of molten iron inside Earth’s outer core. However, the movement of this mass creates electrical currents that create the magnetic field unevenly, resulting in a dramatic weakening effect.
Researchers have been tracking the SAA for years and have discovered new insights into its behavior. The phenomenon appears to be slowly drifting around and may even be splitting into two distinct cells.
Additionally, recent studies suggest that the SAA is not a new occurrence but rather a recurrent magnetic event that has affected Earth since 11 million years ago.
With NASA’s continued monitoring of the SAA, scientists can make models and predictions about its behavior. As the phenomenon continues to change, it is essential for NASA to keep observing it to better understand this complex and difficult-to-understand magnetic oddity.
Source: https://www.sciencealert.com/nasa-is-watching-a-huge-growing-anomaly-in-earths-magnetic-field