Fears that Earth’s magnetic polarity is going to invert have been sparked by the discovery of a mystery location in the South Atlantic where the geomagnetic field strength is fast declining. According to a new study, the existing changes aren’t particularly significant, and reversal is unlikely. The magnetic field of the Earth works as a shield, shielding the globe from the life-threatening environment found in space. The magnetic field, on the other hand, is not stable, and polarity reversal occurs every 2,00,000 years on average. Furthermore, over the previous 180 years, the strength of the Earth’s magnetic field has decreased by about 10%.
Simultaneously, in the South Atlantic, off the coast of South America, an area with an exceptionally weak magnetic field has grown. Satellites have been known to malfunction as a result of the region’s exposure to highly charged particles from the Sun on several occasions.
This has led to speculation that the Earth is about to undergo a polarity shift. However, according to a new study, this may not be the case.
The study was published in the journal Proceedings of the National Academy of Sciences and includes data stretching back 9,000 years.
According to Andreas Nilsson, a geologist at Lund University, anomalies like the one in the South Atlantic are likely recurring phenomena linked to similar oscillations in the intensity of the Earth’s magnetic field.
The findings are based on magnetic field measurements obtained from burnt archaeological artifacts and volcanic samples. Clay pots cooked to above 580 degrees Celsius, solidified volcanic lava, and sediments deposited in lakes or the sea are examples.
These items serve as time capsules, storing information about earlier magnetic fields. The researchers were able to observe these magnetisations and replicate the direction and strength of the magnetic field at certain locations and times using precision technology.
They predict that the South Atlantic Anomaly will most likely fade within the next 300 years, based on parallels with the reconstructed anomalies, and that Earth is not on the verge of switching polarity, according to Nilsson.