Skip to comments.Scientists detect unexpected widespread structures near Earth's core
Posted on 06/12/2020 9:24:12 AM PDT by BenLurkin
Earthquakes generate seismic waves below Earth's surface that travel thousands of miles. When the waves encounter changes in rock density, temperature or composition, they change speed, bend or scatter, producing echoes that can be detected. Echoes from nearby structures arrive more quickly, while those from larger structures are louder. By measuring the travel time and amplitude of these echoes as they arrive at seismometers in different locations, scientists can develop models of the physical properties of rock hidden below the surface. This process is similar to the way bats echolocate to map their environment
Using a machine learning algorithm called Sequencer, the researchers analyzed 7,000 seismograms from hundreds of earthquakes of 6.5 magnitude and greater occurring around the Pacific Ocean basin from 1990 to 2018. Sequencer was developed by the new study's co-authors from Johns Hopkins University and Tel Aviv University to find patterns in radiation from distant stars and galaxies. When applied to seismograms from earthquakes, the algorithm discovered a large number of shear wave echoes.
The study revealed a few surprises in the structure of the core-mantle boundary.
The scientists found that the large patch of very dense, hot material at the core-mantle boundary beneath Hawaii produced uniquely loud echoes, indicating that it is even larger than previous estimates. Known as ultralow-velocity zones (ULVZs), such patches are found at the roots of volcanic plumes, where hot rock rises from the core-mantle boundary region to produce volcanic islands. The ULVZ beneath Hawaii is the largest known.
This study also found a previously unknown ULVZ beneath the Marquesas Islands.
(Excerpt) Read more at phys.org ...
Invasion from the middle-earthers next on the putsch against America and Trump?
Satan is big boned.
There’s not enough information here to guess what sort of material makes up those structures, other than “hot” and “dense”. Maybe its uranium.
Science has much cooler graphics than it did when I was a boy.
First it was Antifa, and now we have to worry about LARPers too? Quick, someone grab my D20.
Is it me, or did the seismologists just confirm the existence of Hell?
The Lost Continent of Atlantis.
I juat read Ready Player One a couple weeks ago, wish I had earlier. :-)
The FBI finally found the white supremacists they were looking for...
Possibly where the Moon came out?
“Quick, someone grab my D20.”
I’m grabbing the BFG-2000!
EVERYTHING its pointed at dies!!
I have a copy of that book.
But if we create a core/mantle boundary tax we could keep it under control...what say you Green New Dealers?
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.