Articles tagged with Earth Outer Core
Scientists from the University of Göttingen have made a groundbreaking discovery, finding ruthenium in volcanic rocks on the islands of Hawaii. The finding suggests that material from the Earth's core is leaking into the mantle above, challenging previous assumptions about the planet's internal dynamics.
A new simulation method has been introduced to investigate the Earth's core, revealing significant effects of magnetism on material properties. The approach combines molecular dynamics and spin dynamics, using machine learning to determine force fields with high precision.
Scientists from Australian National University have discovered a doughnut-shaped region in the liquid core, providing new clues about the dynamics of Earth's magnetic field. The region sits parallel to the equator and has low seismic speeds, indicating a high concentration of light chemical elements.
A team of researchers, including Arizona State University scientists, reveals that surface water can penetrate deep into the Earth's core, altering its composition and creating a distinct thin layer. This discovery suggests a more extensive global water cycle than previously recognized.
Research led by The University of Alabama reveals a dense, yet thin, layer of ancient ocean floor surrounding the Earth's core-mantle boundary. This ultra-low velocity zone is denser than the rest of the deep mantle and may play an important role in heat escape from the core.
Researchers analyzed fluid dynamics and electrically conducting fluids to conclude the Earth must have been magnetized before or as a result of its formation. This discovery could help narrow down theories on the Earth-Moon system, with implications for future research.
New paleomagnetic research suggests the solid inner core formed around 550 million years ago and restored Earth's magnetic field. The study provides clues about planetary evolution, habitability, and the potential for life on other planets.
Researchers have discovered changes in the Earth's outer core, which are responsible for generating the magnetic field. According to Zhou's findings, a one-second discrepancy in SKS wave travel time indicates the formation of low-density regions with light elements such as hydrogen and oxygen.
Scientists have discovered a heterogeneous structure in the Earth's inner core, with adjacent regions of hard, soft, and liquid iron alloys. This finding challenges traditional models of the planet's magnetic field generation and provides new insights into the dynamics at the boundary between the inner and outer core.
Scientists have accurately measured the density of liquid iron under conditions similar to those at Earth's outer core. The findings suggest that pure iron is about 8% more dense than the Earth's outer core, indicating the presence of other light elements.
Scientists have successfully determined the density of liquid iron and sound propagation speed through it at extremely high pressures. They found the density of the molten outer core to be about 8 percent less dense than pure liquid iron, suggesting the presence of additional lighter elements.
Researchers used high-powered supercomputing techniques to simulate extreme conditions and determine the maximum amount of nitrogen in the Earth's outer core. The study provides critical insights into the planet's chemical composition and its potential impact on habitability.
Jessica Irving and her team developed a new model, EPOC, that fits the data better than existing models, providing information about the material properties of the outer core. The outer core is crucial for understanding the history of the magnetic field and providing heat to the mantle.
Research at University of Liverpool found variations in Earth's core affect day length over periods of one to 10 years. The study resolves previously poorly characterised changes and provides new insight into the chemistry and mineralogy of the Earth's deep interior.
A team of scientists led by Yingwei Fei found that oxygen is not a major component of the Earth's liquid outer core, contradicting previous models. The discovery has significant implications for understanding the planet's formation through accretion of dust and clumps of matter.
New research reveals that red giants still exhibit coronal activity, but it is submerged in the chromosphere, a region around 10,000 F. The team used NASA's Chandra X-Ray Observatory and ultraviolet instruments to detect hot coronal gas through UV emissions.
Researchers have detected a rigid material within the fluid outer core, with implications for Earth's magnetic field and rotation axis. The discovery was made using advanced seismic tomography techniques.
New theory proposes that iron-rich sediments are stuck to the bottom of the mantle, creating drag that throws off the Earth's wobble. Seismic waves slow down as they approach the core-mantle boundary, suggesting a thin layer of silicates may be present.
A three-dimensional computer simulation of the geodynamo was achieved in 1995, revealing how Earth's magnetic field is generated. The model shows that the magnetic field reverses polarity every few hundred thousand years due to nonlinear, chaotic behavior.
Scientists at Johns Hopkins University have created a model that suggests a thin jet of relatively cold molten iron is streaming down across the liquid outer core from an area in the mid-Pacific to Earth's solid iron inner core. This 'cold front' could account for irregularities in the magnetic patterns observed over the Pacific.
Researchers have found that the Earth's inner core consists of two distinct parts: a lower area surrounded by an uneven upper layer with different material properties. This discovery is likely to affect the current model of how the Earth and its magnetic field came into being.
Researchers Xiaodong Song and Don Helmberger found two distinct layers in the inner core: a spherical lower part and an uneven upper layer with different material properties. The findings may affect the formation of the Earth's magnetic field.
Scientists at Lawrence Berkeley National Laboratory used seismic data from 40,000 earthquakes to characterize the Earth's structure from crust to inner core. They found evidence of heterogeneity in the outer core, suggesting a liquid iron-nickel-sulfur compound that could help explain the Earth's magnetic field.
Researchers have found that the Earth's inner core is rotating at a faster rate than its outer layers, with estimates suggesting it rotates four to 12 times slower. The independent rotation is thought to be caused by convection in the molten iron outer core, which produces the Earth's magnetic field.
Researchers developed a model to explain the Earth's inner core rotating faster than the rest of the planet, driven by electromagnetic forces and outer core fluid motions. The model provides insights into the mysterious processes generating the magnetic field deep within the Earth's core.
Researchers from UC Berkeley have disproved the hypothesis that the Earth's inner core is a perfectly aligned mass of iron crystals. Instead, they found that the crystals align themselves like boats in a circular eddy, driven by the rise of hotter iron toward the surface. This finding has implications for modeling the Earth's magnetic ...
Researchers at Columbia University's Lamont-Doherty Earth Observatory found that the Earth's inner core is rotating faster than the planet, completing its once-a-day rotation about two-thirds of a second faster than the entire Earth. The discovery was made by measuring changes in seismic wave speeds through the inner core.