Research at Arizona State University hints to a very active inner Earth area as depicted by these drawings. Image on the left is of Earth. The center image shows a section of Earth and its main divisions (solid inner core, liquid outer core and the lower mantle) including the D" zone. The image on the right is a zoom in of the D" region, which was studied by Edward Garnero and his colleagues. The researchers found strong topographical variations of the D" layer. It was detected as geographical variations in the inferred seismic anisotropy, the alignment of fabric or crystals in rocks.
At the surface of Earth, life on a geologic scale is calm and peaceful save the occasional earthquake caused by the rub and slip of Earth’s tectonic plates. But below Earth’s surface, scientists are beginning to find a far more dynamic and tumultuous region than previously thought.
Deep inside Earth, where the mantle meets the molten iron core, researchers are finding telltale signs of what could be a highly active area filled with exotic forms and substances. "This layer is far more complex than what we thought 10 years ago," said Arizona State University seismologist Edward Garnero. "It is a super dynamic situation, probably the most exotic part of Earth’s interior. This area, where the mantle meets the core halfway to Earth’s center (2,900 km below Earth’s surface), the change in density is several times greater than what we find at Earth’s surface, as represented by air and rock."
Garnero and a team of seismologists (Valerie Maupin, of the University of Oslo, Norway; Thorne Lay of the University of California, Santa Cruz; and Matthew Fouch of ASU) recently completed a study of Earth’s interior. They report their findings in the Oct. 8 issue of Science magazine. In "Variable Azimuthal Anisotropy in Earth’s Lowermost Mantle," the ASU researchers decipher unusual layering in Earth’s deep interior that may contain clues about how the interior churns and convects, and the relationship between Earth’s interior and its ever evolving surface.
Skip Derra | EurekAlert!
PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target
22.05.2018 | Mercator Research Institute on Global Commons and Climate Change (MCC) gGmbH
Monitoring lava lake levels in Congo volcano
16.05.2018 | Seismological Society of America
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
23.05.2018 | Physics and Astronomy
22.05.2018 | Life Sciences
22.05.2018 | Earth Sciences