The first direct seismic observation has proved that the direction of the global core rotation changes every six years

American scientists released the latest research report in the latest issue of Scientific Progress that they discovered the evidence of the earth's kernel oscillation, showing that the global core not only rotated faster, but also changed the direction of rotation once every 6 years.

For a long time, scientists have continued to understand the land nuclear. At the end of the 18th century, scientists measured the value of the earth based on density. However, in 1936, Danish earth physicist Ying'er Lyman confirmed that the earth actually had a liquid foreign nuclear and a solid core. In the 1990s, scientists proposed that the ethics rotation is faster than the other parts of the earth -about 1 degree each year, and this view has now been generally accepted.

John Vediel, a professor of the research thesis co -authors and director of the Department of Earth Sciences at the University of Southern California, also supports this view. He further declared in the research that the rotation speed of the global core will change over time, and it is as before According to other scientists, according to a small change of the earth's daily duration and the slight changes in the strength of the earth's magnetic field, the direction of the kernel rotation changes every 6 years.

Vediel and his colleagues compared the data collected by the U.S. Air Force in the large -scale earthquake in Montana from 1969-1974. It was found that the rotation speed of the earth's kernel was slower than before, about 0.1 degrees per year.

"Our analysis of the earthquake data revealed that the core of the earth changed its direction in the six years from 1969 to 1974. From 1969-1971, the rotation speed of the earth's core rotation was slightly slow; from 1971-1974, the ground nuclear directed to another another Move in one direction. We also noticed that the length of a earth day will increase and shorten as expected. "

This latest study marks the first direct seismic observation of scientists to prove that the direction of nuclear rotation changes every 6 years. "The nucleus is not fixed, and it moves under our feet, and it seems to move a few kilometers back and forth every 6 years. In the future, we plan to find enough accurate observation results to compare with the latest results to further understand the understanding How to form the ground core and how it moves with time. "(Science and Technology Daily)

- END -