Fortunately for us, it was renewed thanks to the strengthening of the inner core of the planet.
Geomagnetism stems from the deepest part of the Earth, where the nucleus is made of iron and nickel. However, this state of our planet was captured in a moment in history 565 million years ago. Fortunately, everything changed "for the better".
The geomagnetic field stretches from the inner core of the Earth to the meeting with the so-called "sunny wind". This field is relevant, for, for example, the magnetosphere protects the Earth from cosmic rays that could destroy the outer atmosphere, which will make life more difficult on Earth.
A new study, published in Nature Geoscience, says that the Earth's protective magnetic field may have disappeared about 565 million years ago. Fortunately for us, it was renewed thanks to the strengthening of the inner core of the planet.
While RT is recovering, while it is difficult to access the Earth's core for direct testing, changes in the global magnetic field are reflected in the orientation of the particles of certain iron-rich minerals. Therefore, experts analyzed plagioclase crystals and clinopyroxene formed 550-600 million years ago in Quebec, Canada.
Based on the analysis, it was ascertained that the magnetosphere at that time went through difficult times because it was weakened and its polarity changed ten times faster than what is currently happening. However, over time it began to recover. The reason is now revealed: this is due to the strengthening of the inner core of the Earth.
A few weeks ago another study raised a controversial hypothesis suggesting that the essential elements of life on Earth actually come from another planet. Such a planet would affect the world at some point, also forming our natural satellite: the moon (see this note).