Fortunately for us, it was restored thanks to the solidification of the inner core of the planet.
Geomagnetism arises from the deepest part of the Earth, where there is a nucleus of iron and nickel. However, this condition of our planet was obfuscated at a time in history 565 million years ago. Luckily, everything changed "for good".
The geomagnetic field extends from the inner core of the Earth to the encounter with the so-called "solar wind". The field is relevant, since, for example, the magnetosphere protects Earth from cosmic rays that could destroy the external atmosphere, making life difficult on Earth.
The new study published in the journal Nature Geoscience shows that Earth's protective magnetic field may have been about to disappear some 565 million years ago. Fortunately for us, it was restored thanks to the solidification of the inner core of the planet.
As RT rescues, although it is difficult to access the Earth's core to conduct direct investigations, changes in the global magnetic field are reflected in the orientation of the particles of certain minerals rich in iron. For this reason, the experts analyzed plagioclase and clinopiroxen crystals formed 550-600 million years ago in Quebec, Canada.
Based on the analysis, it was concluded that the magnetosphere happened at difficult times at that time, since it was weakened and its polarity changed ten times faster than is currently the case. However, over time it began to restore itself. The reason has now been discovered: it was due to the solidification of the inner core of the Earth.
A few weeks ago, another study posed a controversial hypothesis, by proposing that the essential elements for life on Earth actually came from another planet. Such a planet would have hit the globe globally at some point, also forming our natural satellite: the Moon (see this note).