A study by researchers from Britain and the United States showed that the Earth’s magnetic field, which provides protection from damaging solar flares, may change its direction 10 times faster than previously thought.
The study highlights the liquid iron that flows about 2,000 miles below the surface of the earth, and how it affects the movement of the Earth’s magnetic field.
The molten metal core of the Earth creates electrical currents that charge the planet’s magnetic field, which is important because it helps support navigation systems and protects us from radiation from outer space.
The study, published in Nature Communications, explains how researchers discovered that our understanding of the magnetic field is unclear, and shows that changes in the direction of the magnetic field can be up to 10 times faster, than any record at all.
The work involved combining computer simulations of the field generation and rebuilding process, which were published recently for the time changes in the Earth’s magnetic field, which extend over the past 100,000 years.
The work revealed a sharp change in the direction of the magnetic field about 390,000 years ago. The shift, at 2.5 degrees a year, was much faster than previous estimates.
This shift preceded the global Laschamp movement, a short reflection of the Earth’s magnetic field nearly 41,000 years ago.
And there were many times in history when the Earth’s magnetic poles were reflected, and we know this because of the magnetic structure of some ancient rocks that show minerals of different polarization.
Rapid changes are associated with a local weakening of the magnetic field, which means that the Earth is more vulnerable to radioactive elements from space during these times.
In general, over the past century, the Earth’s magnetic field has witnessed a decrease in its strength by 10%, with a special vulnerability observed over the Atlantic Ocean between Africa and South America.
The region known as the abnormal South Atlantic has proven to be a hot spot for the technical difficulties of the satellites, orbiting the Earth, where some scientists have suggested that weakness is a sign of impending geographic magnetic reflection.
However, understanding the Earth’s magnetic field through geological time is very complex.