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Earth's magnetic field almost collapsed 565 million years



Concept of the Artist for Geodinamus and Earth's Magnetic Field during Pole Reversal. Earth's magnetic field, which protects life from intense solar radiation, almost collapsed 565 million years ago, according to a study published Monday in Nature Geoscience . life on Earth would face serious challenges because the solar wind would probably break the planet from its atmosphere and drop the surface with harmful radiation. Fortunately, the melted core of our planet has probably begun to harden during the late Edictara period, according to the new document. It loaded the Earth's magnetic field correctly when it was at its weakest point. Now, half a billion years later, the Earth's magnetic field is ten times stronger than it was during this early age. Scientists led by Richard Bono, a researcher of palaeomagnetism at the University of Rochester, used ancient crystals from a location near Sept, Quebec, to reconstruct this nuclear kernel time line or cure. It is believed that the kernel of the Earth was completely liquidated at some point, and the question of when it began to harden confused scientists for decades. Past estimates ranged from 500 million years to 2.5 billion years. Bono's team is now demonstrating that the nuclear reaction began 565 million years ago.

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Earth's Interior Model The inner core of the Earth is made of a hard iron-nickel alloy that is hot like the surface of the Sun (about 5,430 ° C). This core is surrounded by Liquid outer core that feeds Earth's magnetism with convection The inner core slowly increases by "freezing" molten iron and nickel to its mass, a process that pumps heat into the outer core and strengthens the Earth's magnetic field. leaves its prints in some minerals, influencing the direction and orientation of grid formation, exploring crystals of feldspar and pyroxene from the Ediacaran-old rock near Sept-les, indicating that the magnetic field collapsed during the late Edict , turning its 20 times faster than today.

These are signs of a collapsing geodynamic, the team said. The fact that the field grew stronger after this time, rather than collapsing, suggests that the germ has started and gave the dynamo of the Earth the juice needed to increase the field.

The timeline proposed by Bono and his colleagues suggests that the nuclear reaction happened just before the Cubbium explosion, a period of huge evolutionary advance 541 million years ago, which led to the rapid emergence of animal life.

Read these: Watch these visualizations of NASA's cosmic magnetism

Evidence of weak magnetism at the end of the Eclipse led some scientists to assume that the Earth had been irradiated without a strong field, causing big disappearance. The organisms that could have an advantage during this time were moving or hard-cut species that could be protected from radiation and they thrive at the beginning of the Cambria. that there is no general consensus on whether the weak magnetic field is associated with a cambrian

"The age of the ultra low intensity of the geomagnetic field is intriguing," the authors write in the article. "Proposals that reduced magnetic shielding has had an effect on the profound changes in the evolution of the animals that have noted this and the next early Cambrian interval are controversial." Earth's magnetic intensity influences the evolution of life. By offering convincing evidence to solve the debate on the age of the Earth's core, Bono and his colleagues have added an important part of this puzzle.

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