Is the Earth's magnetic field weakening? Are we facing polarization of the Earth? These questions are on the minds of many people. In addition to considering these issues, scientists are also dealing with other issues related to the magnetosphere. This has been shown in a new study conducted by the University of Oxford and the Massachusetts Institute of Technology A record of the Earth's magnetic field from 3.7 billion years ago. The ancient field turned out to have amazing properties.
The results of the analysis were published in the Journal of Geophysical Research. The scientists pointed out that the research is a study of the oldest traces of the Earth's magnetic field that were discovered on the basis of complete rock samples. This allows you to be more accurate and more precise A reliable assessment of the formation and development of the field than in other previous studies. This knowledge may help find answers to many questions that concern scientists.
The Earth's magnetic field has two poles, north and south, and occurs naturally in and around the Earth, extending several tens of thousands of kilometers from the Earth's surface. The region in which this occurs is called the Earth's magnetosphere.
As the Polish Geological Institute has now explained There is no coherent theory that would satisfactorily describe the Earth's magnetic field and at the same time explain all the phenomena related to it.. However, scientists continue to seek as much information as possible about the formation, development and functioning of the field. This is very important because, as the researchers point out, a better understanding of the ancient strength and variability of Earth's magnetic field will help determine whether Planetary magnetic fields are essential for life on the planet's surface, and what is their role in the evolution of the atmosphere.
In a new study Researchers from the University of Oxford and MIT analyzed an ancient sequence of iron-bearing rocks from Isua, Greenland. In this way, they discovered that rocks dating back 3.7 billion years captured the strength of the ancient magnetic field at a value similar to the modern magnetic field. Research has found that the magnetic field is billions of years old Overall, it is surprisingly similar to the field surrounding Earth today.
Extracting reliable records from rocks this age is extremely difficult, and it was really exciting to see the initial magnetic signals starting to emerge as we analyzed these samples in the lab. This is a really important step forward because We are trying to determine the role of the ancient magnetic field when life first appeared on Earth – said lead researcher Professor Claire Nicholls from the Department of Earth Sciences at the University of Oxford.
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