Discovered the Earth’s hidden layers:
Scientists have recently claimed to have discovered the Earth’s ‘hidden layer’ Scientists have been confused for decades by a strange seismic signal known as ‘PKP’, which travels through the center of the Earth and reaches the surface before the main wave of such an earthquake. The news is from BDNews.
The report says the signs have been wrapped in mystery for a long time. The mystery has been revealed in a new study by geologists at the University of Utah. Scientists thought that the precursors of the PKP or all these signals came from the deep regions of North America and the western Pacific Ocean.
The researchers claim that these signals may be associated with ‘ultra-low velocity zones (ULVZs)’ or very-low velocity areas. The thin layer of the Earth’s mantle is called the ‘Ultra-Low Velocity Zone (ULVZ)’, where the various waves of earthquakes slow down dramatically.
The study was published in the scientific journal AGU Advances. Research indicates that all ULVZs may play a role in the formation of large volcanic hotspots such as Yellowstone, the Hawaiian Islands and Iceland.
It is one of the most extreme features ever discovered on Earth. “We don’t really know what,” said Michael Thorn, lead author of the study and associate professor of geology and geophysics at the University of Utah.
As Thorn and his research team discovered, all ULVZs are often attached to the bottom of volcanic hotspots. As a result, researchers claim, these areas may be the source of the various plums in the mantle, which formed these large-sized and volcanic volcanoes. Thorne’s research team used advanced seismic technology to record 58 earthquakes that occurred near the Australian island of New Guinea and were recorded in North America.
Researchers develop a new method for modeling different waveforms of earthquakes. They were able to identify the source of PKP precursors at various locations along the boundary between the outer core and mantle of the Earth’s liquid, known as the ‘core-mantle’ boundary located 2,900 km below the Earth’s surface.
All the results of the study suggest that the precursors of PKP probably spread through the ULVZ at this core–mantle boundary. Researcher Thorne speculates that the globe is formed in different regions of very low velocity, underlying different tectonic plates. It is a piece of the Earth’s crust, which is submerged in the mantle. and it strikes the core–mantle boundary of the oceanic region. especially its location below North America.
What we have now found is that these very low velocity areas are not just near various volcanic hotspots. Some have also spread across the core-mantle boundary below North America, Thorn said.