The core state is not “an iron ball”!Scientists rely on seismic waves to overthrow 50-year theory | International News | Global

In the past, the earth science community believed that the earth’s core was a solid iron-containing sphere wrapped in a liquid outer core and divided into crust, earth’s letter, and earth’s core. However, according to the latest seismic wave research and observation of the earth’s structure, it was found that people in the past deduced that the earth’s core was a block. The hypothesis of “solid iron ball” is not correct. In fact, the core is in a variety of states ranging from hard to soft, and even to liquid metal. It can be said that some parts are “slushy”. Scientists marvel at “a new hidden world.”

According to the latest report on“Physics of the Earth and Planetary Interiors”According to the results of the research, in the past half century, the scientific community believes that the center of the earth’s core is a solid sphere containing iron, which is surrounded by a liquid outer core. However, the research geophysicist Rhett Butler and his team analyzed five global After the seismic waves returned by major earthquakes occurred in different locations, it was discovered that not all seismic waves would receive the “collision solid matter” bounced back after reaching the core of the earth. Instead, some areas would “pass directly through the core” and wanted to detect it. Rebound shock waves are quite difficult. This discovery, after repeated inspections and observations, can confirm that the hardness of the inner core is not even. In fact, there may be multiple forms of solid, liquid and semi-melted liquid metal at the same time. Butler used a supercomputer simulation in Japan and found that there is an adjacent solid-liquid ferroalloy area 240 kilometers away from the top of the inner core. This is also a significant difference from the doctrine since the 1970s. Butler believes that this puts new restrictions on the composition, thermal history, and evolution of the Earth. Scientists also believe that this research may change our understanding of the Earth’s magnetic field. The originally rotating liquid outer core drives The magnetic field of the earth’s rotation, but the inner core will also affect the change of the magnetic field. Research by the National Aeronautics and Space Administration (NASA) has shown that some other planets, including Mars, have a liquid core, but lack an inner core and no magnetic field.