The solid core of the Earth probably shaped around 565 million years ago, as revealed by the new study—saving the magnetic shield of the Earth in the course. The magnetic field of Earth creates an actual barricade against charged particles hailing from space—like cosmic radiation and solar wind—that would otherwise transform us all into crunchy mush. Also, it defends the atmosphere of Earth that would be whipped gradually by these identical solar winds in its nonexistence.
Around that time, the magnetic field of Earth was at its lowest intensity, as reported by the study’s authors. This proposes that the internal dynamo of our planet was about to crumple at that date (as this dynamo is what produces the magnetic field of the planet). The creation of solid inner core of Earth was the one occasion that could reinforce this geomagnetic field, as a result, this couldn’t have ensued yet.
The team, as such, suggests that the inner core of the planet had started to harden around this time, though the procedure wasn’t complete. These findings should assist in improving our existing estimations of when the inner core of Earth solidified. At present, these estimations span between 2.5 billion and 500 million years ago. Peter Driscoll, in a News & Views editorial specifying the research, stated that “the inner core’s nucleation might have taken place right at the last minute to revive the geodynamo and preserve the magnetic shield of Earth.”
Likewise, the north magnetic pole of Earth is on the shift, erratically tilting toward Siberia and away from the Canadian Arctic. It is drifted so much that the existing presentation of the magnetic field of the complete globe, just upgraded in 2015, is outdated now. And thus, geologists have surfaced with a new model to be released likely on January 30.