The rays of the Sun are not just impacting humans and the surface of the Earth, but also penetrating deep within the Earth and making changes in its core, as per a new study.

In a new paper, which was published in the journal Nature Communications, scientists explained how the ancient magma present inside the Earth's core has some chemical properties that show it is being impacted by the Sun's rays.&nbsp;

<h2>How are the Sun's rays making their way to Earth's core?</h2>

The Sun's rays impact Earth's core when the dead marine life gets transported into the interior of the Earth and changes the magma's "redox" state.

The Sun has been heavily influencing the marine life around the world which has depended on its energy and warmth.&nbsp;

Because of the variety in solar radiation across the surface of the planet, marine life remains differently distributed in the fossil record.&nbsp;

Also Read:&nbsp;<a href="https://www.wionews.com/science/oxygen-is-depleting-from-earths-water-heres-how-it-is-threatening-lives-on-planet-742670">Oxygen is depleting from Earth's water. Here's how it is threatening lives on planet</a>

After a wide span of time, these dead organisms reach into the magma-filled mantle of the Earth through the process called subduction, in which one plate of the crust of the Earth slowly gets sucked beneath another plate.

The paper suggested that the presence of these marine creatures in the magma is affecting the arc magma's "redox" state in which a balance is created between oxidised and reduced forms of molecules.&nbsp;

The researchers explained that the redox state of magma showed a gradient with latitude, which further explained how marine creatures are reducing the magma and the Sun is changing Earth's core.

"Previous studies mainly compared samples from the same longitudinal regions, such as the U.S. in the northern hemisphere and Mexico in the tropical zone, without finding significant differences. However, our samples from different latitudes showed varying redox responses, which piqued our curiosity. Trying to explain these differences led us to discover this unexpected pattern," said study author Wan Bo, who is a geologist at the Chinese Academy of Sciences,&nbsp;in a statement.

"This unexpected pattern suggests that the surface climate has a direct influence on the deep Earth. It also suggests that the Earth's surface environment and climate have a vital influence on the deep Earth," Wan added.

<h2>Carbon deposits on seafloors: study</h2>

The scientists also found more carbon deposits present on the seafloor at lower latitudes which have been interacting with sulfur and becoming sulfides. This is also suspected to have contributed to the redox of the magma.

Watch:&nbsp;China proposes information superhighway between Earth and Moon

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"The observed pattern suggests a strong link between the surface environment and the redox state of the deep Earth, providing new directions for exploring the resources and environmental impacts of subduction systems at different latitudes," said Hu Fangyang, who is a researcher at the Chinese Academy of Sciences.

(With inputs from agencies)

The rays of the Sun are not just impacting humans and the surface of the Earth, but also penetrating deep within the Earth and making changes in its core, as per a new study.

The rays of the Sun are not just impacting humans and the surface of the Earth, but also penetrating deep within the Earth and making changes in its core, as per a new study. In a new paper, which was published in the journal Nature Communications, scientists explained how the ancient magma present inside the Earth's core has some chemical properties that show it is being impacted by the Sun's rays. How are the Sun's rays making their way to Earth's core? The Sun's rays impact Earth's core when the dead marine life gets transported into the interior of the Earth and changes the magma's "redox" state. The Sun has been heavily influencing the marine life around the world which has depended on its energy and warmth. Because of the variety in solar radiation across the surface of the planet, marine life remains differently distributed in the fossil record. Also Read: Oxygen is depleting from Earth's water. Here's how it is threatening lives on planet After a wide span of time, these dead organisms reach into the magma-filled mantle of the Earth through the process called subduction, in which one plate of the crust of the Earth slowly gets sucked beneath another plate. The paper suggested that the presence of these marine creatures in the magma is affecting the arc magma's "redox" state in which a balance is created between oxidised and reduced forms of molecules. The researchers explained that the redox state of magma showed a gradient with latitude, which further explained how marine creatures are reducing the magma and the Sun is changing Earth's core. "Previous studies mainly compared samples from the same longitudinal regions, such as the U.S. in the northern hemisphere and Mexico in the tropical zone, without finding significant differences. However, our samples from different latitudes showed varying redox responses, which piqued our curiosity. Trying to explain these differences led us to discover this unexpected pattern," said study author Wan Bo, who is a geologist at the Chinese Academy of Sciences, in a statement. "This unexpected pattern suggests that the surface climate has a direct influence on the deep Earth. It also suggests that the Earth's surface environment and climate have a vital influence on the deep Earth," Wan added. Carbon deposits on seafloors: study The scientists also found more carbon deposits present on the seafloor at lower latitudes which have been interacting with sulfur and becoming sulfides. This is also suspected to have contributed to the redox of the magma. Watch: China proposes information superhighway between Earth and Moon "The observed pattern suggests a strong link between the surface environment and the redox state of the deep Earth, providing new directions for exploring the resources and environmental impacts of subduction systems at different latitudes," said Hu Fangyang, who is a researcher at the Chinese Academy of Sciences. (With inputs from agencies)

Sun is slowly penetrating and changing Earth's core. Here's how

The scientists from Northwestern University in Evanston, Illinois have discovered a reservoir of water that is three times the size of all of Earth's oceans, deep beneath the planet's surface. This underground water supply rests some 700 km beneath our feet.

The quest to find the origins of Earth’s water led researchers to the&nbsp;massive find—a colossal ocean ensconced within the Earth’s mantle, over 700 kilometres below the surface.&nbsp;

Also read:&nbsp;<a href="https://www.wionews.com/science/earth-may-have-hosted-dune-like-sandworm-more-than-500-million-years-ago-706802">Earth may have hosted ‘Dune’-like sandworm more than 500 million years ago</a>

This hidden ocean, concealed within a blue rock known as ringwoodite, dares our understanding of where Earth’s water came from. The size of this subterranean sea is triple&nbsp;the volume of all the planet’s surface oceans combined.

This new discovery not only enthrals with its scale but also proposes a new theory about Earth’s water cycle. It recommends that instead of arriving via comet impacts, as some theories have posited, Earth’s oceans may have slowly seeped out from its very core.

Science Behind The Discovery

Steven Jacobsen, a researcher at Northwestern University in Illinois and the lead author of the study, informs, “This is substantial evidence that water on Earth came from within.”&nbsp;

To uncover this underground ocean, researchers used an array of 2000 seismographs across the United States, analysing seismic waves from over 500 earthquakes. Waves&nbsp;which travel through Earth’s inner layers, including its core, slow down when passing through wet rock, allowing scientists to assume the presence of this vast water deposit.

Earth’s Water Cycle Reimagined

The possibility that water exists in the Earth's mantle and sweats between the rock grains may change our perception of the planet's water cycle. Jacobsen further emphasised&nbsp;the importance of this reservoir, pointing out that without it, water would be on the surface of the Earth and that the only visible land may be the peaks of mountains.

Also read:&nbsp;<a href="https://www.wionews.com/science/mars-may-have-hosted-life-for-millions-of-years-longer-than-previously-thought-706772">Mars may have hosted life for millions of years longer than previously thought</a>

Now, with this revolutionary discovery, researchers are keen on gathering more seismic data from around the world to determine if this mantle melting is a common occurrence. Their findings could revolutionise our understanding of the water cycle on Earth, offering new insights into one of our planet’s most fundamental processes.

(With inputs from agencies)

The scientists from Northwestern University in Evanston, Illinois have discovered a reservoir of water that is three times the size of all of Earth's oceans, deep beneath the planet's surface.

The scientists from Northwestern University in Evanston, Illinois have discovered a reservoir of water that is three times the size of all of Earth's oceans, deep beneath the planet's surface. This underground water supply rests some 700 km beneath our feet. The quest to find the origins of Earth’s water led researchers to the massive find—a colossal ocean ensconced within the Earth’s mantle, over 700 kilometres below the surface. Also read: Earth may have hosted ‘Dune’-like sandworm more than 500 million years ago This hidden ocean, concealed within a blue rock known as ringwoodite, dares our understanding of where Earth’s water came from. The size of this subterranean sea is triple the volume of all the planet’s surface oceans combined. This new discovery not only enthrals with its scale but also proposes a new theory about Earth’s water cycle. It recommends that instead of arriving via comet impacts, as some theories have posited, Earth’s oceans may have slowly seeped out from its very core. Science Behind The Discovery Steven Jacobsen, a researcher at Northwestern University in Illinois and the lead author of the study, informs, “This is substantial evidence that water on Earth came from within.” To uncover this underground ocean, researchers used an array of 2000 seismographs across the United States, analysing seismic waves from over 500 earthquakes. Waves which travel through Earth’s inner layers, including its core, slow down when passing through wet rock, allowing scientists to assume the presence of this vast water deposit. Earth’s Water Cycle Reimagined The possibility that water exists in the Earth's mantle and sweats between the rock grains may change our perception of the planet's water cycle. Jacobsen further emphasised the importance of this reservoir, pointing out that without it, water would be on the surface of the Earth and that the only visible land may be the peaks of mountains. Also read: Mars may have hosted life for millions of years longer than previously thought Now, with this revolutionary discovery, researchers are keen on gathering more seismic data from around the world to determine if this mantle melting is a common occurrence. Their findings could revolutionise our understanding of the water cycle on Earth, offering new insights into one of our planet’s most fundamental processes. (With inputs from agencies)

Gigantic ocean triple the volume of all of Earth's surface oceans has just been found

Scientists have been baffled after discovering mysterious elements in ancient lava which led to the conclusion that the core of the Earth is leaking. 
 
A study was carried out on a 62-million-year-old lava which flows on Baffin Island in Canada's Arctic Archipelago. In the study, it was found that the lava contains unusually high levels of helium-3, which is a rare isotope and is related to the core of our planet. 
 
The findings of the study were published in the journal Nature on Wednesday (Oct 18) and since then, the discovery led to massive debates among experts and fellow researchers. 
 
The readings were collected from the ancient lava which flows in Baffin Island by the combined team of geochemists from the California Institute of Technology and Woods Hole Oceanographic Institution.

ALSO READ |&nbsp;<a href="https://www.wionews.com/trending/humans-are-secret-alien-race-who-invaded-earth-musk-our-overlord-claims-googles-ai-bot-649601">Humans are secret alien race who invaded Earth, Musk our overlord, claims Google’s AI bot</a>

The large landmass has the highest ratios of helium-4, and helium-3 as well as a third isotope that has always been present in terrestrial volcanic rocks. It was noted by the research team that it is a big discovery to find such high levels of helium-3 at a terrestrial site. Helium-3, due to its nature, is a very rare element. 
 
As soon as this element reaches the surface, it escapes into the atmosphere and slowly disappears into space. If it is discovered on the surface, the chances are high that it came out of the Earth's core. 
 
If the helium-3 has flown from the Earth's core then the other material around it should also be present to give physical examples of core material. 
 
The findings, which have surfaced recently, could challenge the initial theories about the Earth's core, which was believed to be sealed away. 
 
If it is proved that the Earth's core is indeed leaking, it will pave a path for scientists to study the core material of the Earth, which has never happened before.

<h2>Helium-3 containing secrets about the formation of Earth?</h2>

This primordial helium-3 is likely to contain secrets about how our planet was formed which cannot be known in any other way. 
 
“We know very little about Earth's core, other than that it exists,” said Forrest Horton, a geochemist at Woods Hole Oceanographic Institution, while speaking to VICE.

WATCH |&nbsp;Gravitas: A chunk of asteroid is coming to earth

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“This makes studying the core both intriguing and frustrating. Traditionally, the core and outer layers of our planet (mantle and crust) were presumed to be geochemically isolated (i.e., material does not transfer back and forth),” he added. 
 
"Increasingly, scientists have been challenging this notion,” Horton said. He further stated that the "exciting" discovery suggests that the Earth's core is more dynamic than what was believed.

(With inputs from agencies)

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Scientists have been baffled after discovering mysterious elements in ancient lava which led to the conclusion that the core of the Earth is leaking. A study was carried out on a 62-million-year-old lava which flows on Baffin Island in Canada's Arctic Archipelago.

Scientists have been baffled after discovering mysterious elements in ancient lava which led to the conclusion that the core of the Earth is leaking. A study was carried out on a 62-million-year-old lava which flows on Baffin Island in Canada's Arctic Archipelago. In the study, it was found that the lava contains unusually high levels of helium-3, which is a rare isotope and is related to the core of our planet. The findings of the study were published in the journal Nature on Wednesday (Oct 18) and since then, the discovery led to massive debates among experts and fellow researchers. The readings were collected from the ancient lava which flows in Baffin Island by the combined team of geochemists from the California Institute of Technology and Woods Hole Oceanographic Institution. ALSO READ | Humans are secret alien race who invaded Earth, Musk our overlord, claims Google’s AI bot The large landmass has the highest ratios of helium-4, and helium-3 as well as a third isotope that has always been present in terrestrial volcanic rocks. It was noted by the research team that it is a big discovery to find such high levels of helium-3 at a terrestrial site. Helium-3, due to its nature, is a very rare element. As soon as this element reaches the surface, it escapes into the atmosphere and slowly disappears into space. If it is discovered on the surface, the chances are high that it came out of the Earth's core. If the helium-3 has flown from the Earth's core then the other material around it should also be present to give physical examples of core material. The findings, which have surfaced recently, could challenge the initial theories about the Earth's core, which was believed to be sealed away. If it is proved that the Earth's core is indeed leaking, it will pave a path for scientists to study the core material of the Earth, which has never happened before. Helium-3 containing secrets about the formation of Earth? This primordial helium-3 is likely to contain secrets about how our planet was formed which cannot be known in any other way. “We know very little about Earth's core, other than that it exists,” said Forrest Horton, a geochemist at Woods Hole Oceanographic Institution, while speaking to VICE. WATCH | Gravitas: A chunk of asteroid is coming to earth “This makes studying the core both intriguing and frustrating. Traditionally, the core and outer layers of our planet (mantle and crust) were presumed to be geochemically isolated (i.e., material does not transfer back and forth),” he added. "Increasingly, scientists have been challenging this notion,” Horton said. He further stated that the "exciting" discovery suggests that the Earth's core is more dynamic than what was believed. (With inputs from agencies) You can now write for wionews.com and be a part of the community. Share your stories and opinions with us here. WATCH WION LIVE HERE

Is Earth's core 'leaking'? Scientists discover mystery elements in 62mn-year-old lava

Mountains with peaks&nbsp;three to four times higher than Mount Everest have been discovered deep inside the Earth, scientists said.

Using seismology centres in Antarctica, experts found these astonishingly huge “mountains” in the boundary between the core and mantle, around 1,800 miles deep (around 2,900 kilometres).

Dubbed ultra-low velocity zones (ULVZ), these gargantuan underground mountain ranges had managed to escape the scientists’ gaze all these years until earthquakes and atomic explosions generated enough seismic data to be spotted by them, reported BBC.

To make sense of how big these mountains are, Mount Everest is around 5.5 miles high (8.8 kilometres) from the surface, while the underground mountains are said to be over 24 miles (38 kilometres) in height.

“Analysing 1000’s of seismic recordings from Antarctica, our high-definition imaging method found thin anomalous zones of material at the CMB [core-mantle boundary] everywhere we probed,” Arizona State University geophysicist Edward Garnero said in a statement.

“The material’s thickness varies from a few kilometres to 10’s of kilometres. This suggests we are seeing mountains on the core, in some places up to 5 times taller than Mt. Everest.”

<h2>How did these mountains form?</h2>

One possible explanation given by the scientists is that these ancient formations were created when oceanic crusts were forced into Earth’s interior.

They argue that it might have begun with tectonic plates slipping down into the Earth's mantle&nbsp;and sinking to the core-mantle boundary.

These then slowly spread out to form an assortment of structures, leaving a trail of both mountains and blobs. This would mean both are made from ancient oceanic crust: a combination of basalt rock and sediments from the ocean floor, albeit transformed by intense heat and pressure.

<h2>What does the discovery entail?</h2>

The study seeks to argue that these underground peaks may play a critical role in how heat escapes the Earth’s core.

Also read |&nbsp;<a href="https://www.wionews.com/science/long-covid-patients-have-lower-quality-of-life-than-those-with-cancer-parkinsons-disease-study-602160">Long Covid patients have lower quality of life than those with cancer, Parkinson’s disease: Study</a>

The core is responsible for generating Earth’s magnetic field and some of the material from it can even be ejected up to the Earth’s surface during volcanic eruptions.&nbsp;

Also read |&nbsp;<a href="https://www.wionews.com/science/origins-of-masturbation-traced-back-to-40-million-years-found-primarily-in-male-primates-601728">Origins of masturbation traced back to 40 million years, found primarily in male primates</a>

“Seismic investigations, such as ours, provide the highest resolution imaging of the interior structure of our planet, and we are finding that this structure is vastly more complicated than once thought,” study co-author and University of Alabama geoscientist Samantha Hansen&nbsp;said in a statement.

“Our research provides important connections between shallow and deep Earth structure and the overall processes driving our planet.”

(With inputs from agencies)

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Mountains with peaks three to four times higher than Mount Everest have been discovered deep inside the Earth, scientists said. Using seismology centres in Antarctica, experts found these astonishingly huge “mountains” in the boundary between the core and mantle, around 1,800 miles deep (around 2,900 kilometres).

Mountains with peaks three to four times higher than Mount Everest have been discovered deep inside the Earth, scientists said. Using seismology centres in Antarctica, experts found these astonishingly huge “mountains” in the boundary between the core and mantle, around 1,800 miles deep (around 2,900 kilometres). Dubbed ultra-low velocity zones (ULVZ), these gargantuan underground mountain ranges had managed to escape the scientists’ gaze all these years until earthquakes and atomic explosions generated enough seismic data to be spotted by them, reported BBC. To make sense of how big these mountains are, Mount Everest is around 5.5 miles high (8.8 kilometres) from the surface, while the underground mountains are said to be over 24 miles (38 kilometres) in height. “Analysing 1000’s of seismic recordings from Antarctica, our high-definition imaging method found thin anomalous zones of material at the CMB [core-mantle boundary] everywhere we probed,” Arizona State University geophysicist Edward Garnero said in a statement. “The material’s thickness varies from a few kilometres to 10’s of kilometres. This suggests we are seeing mountains on the core, in some places up to 5 times taller than Mt. Everest.” How did these mountains form? One possible explanation given by the scientists is that these ancient formations were created when oceanic crusts were forced into Earth’s interior. They argue that it might have begun with tectonic plates slipping down into the Earth's mantle and sinking to the core-mantle boundary. These then slowly spread out to form an assortment of structures, leaving a trail of both mountains and blobs. This would mean both are made from ancient oceanic crust: a combination of basalt rock and sediments from the ocean floor, albeit transformed by intense heat and pressure. What does the discovery entail? The study seeks to argue that these underground peaks may play a critical role in how heat escapes the Earth’s core. Also read | Long Covid patients have lower quality of life than those with cancer, Parkinson’s disease: Study The core is responsible for generating Earth’s magnetic field and some of the material from it can even be ejected up to the Earth’s surface during volcanic eruptions. Also read | Origins of masturbation traced back to 40 million years, found primarily in male primates “Seismic investigations, such as ours, provide the highest resolution imaging of the interior structure of our planet, and we are finding that this structure is vastly more complicated than once thought,” study co-author and University of Alabama geoscientist Samantha Hansen said in a statement. “Our research provides important connections between shallow and deep Earth structure and the overall processes driving our planet.” (With inputs from agencies) WATCH WION LIVE HERE

Mountains 3 to 4 times larger than Everest found near Earth’s core

It is often a crazy fact to wrap one's head around that we live on a planet with a solid upper layer, beneath which is a molten-liquid core, reaching thousands of degrees in temperature.

It is often a crazy fact to wrap one's head around that we live on a planet with a solid upper layer, beneath which is a molten-liquid core, reaching thousands of degrees in temperature. However, what lies at the very centre of Earth's solid, metallic core is a mystery that has puzzled scientists over the years. According to new research published in the journal Nature Communications on Tuesday, it has been posited that our planet has a distinct ball of iron within its metallic core. The study states that the newly-detected centre is a 644-kilometre-wide ball of metal with the composition of iron-nickel alloy. The fact that this ball had not been detected previously could be attributed to the simple fact that its outer layer is also composed of a similar iron-nickel alloy with trace amounts of other elements. WATCH | Most of the Earth's water is underground? × With the Earth's core impossibly hot, it is difficult to reach anywhere near it. Thus, scientists use seismology to gauge what lies in the innards of our home planet. After any earthquake seismic waves travel across the Earth, changing their path and orientation when passing through different materials. This allows the geophysicists to decipher what lies at Earth's rather mysterious core. The scientists involved in the study used a similar process to ascertain their findings. “In this study, for the first time, we report observations of seismic waves originating from powerful earthquakes traveling back and forth from one side of the globe to the other up to five times like a ricochet,” said Dr Thanh-Son Phạm, one of the coauthors of the study. “Additionally, the transition from the innermost (solid) ball to the outer shell of the inner core (also solid shell) seems rather gradational than sharp, That is why we cannot observe it via direct reflections of seismic waves from it.” Read more: Earth's inner core might have stopped and changed direction: Check out what happens now! The discovery of an inner layer is expected to widen the horizon of scientists and their understanding of Earth's magnetic field and how it has evolved over centuries and will continue to do so in the coming future. (With inputs from agencies) WATCH WION LIVE HERE:

What lies at the centre of Earth's core? Scientists answer THIS age-old question

Astronomers have discovered the&nbsp;Earth’s hidden layer&nbsp;within its innermost core in a recent study.

The study conducted by researchers from The Australian National University (ANU) and was&nbsp;published in the Journal of Geophysical Research: Solid Earth.&nbsp;

In this study, scientists used data available from the&nbsp;International Seismological Centre (ISC) to prove&nbsp;that seismic rays travelling parallel to the Earth's rotational axis travel faster than those parallel to the equator.

Also read|&nbsp;<a href="https://www.wionews.com/science/why-scientists-believe-life-on-earth-will-perish-way-earlier-than-previously-thought-367457" hreflang="en">Why scientists believe life on Earth will perish way earlier than previously thought</a>

Traditionally we've been taught the Earth has four main layers: the crust, the mantle, the outer core and the inner core.&nbsp;The idea of another distinct layer was proposed a couple of decades ago, but the data has been very unclear.&nbsp;

The lead author of the study, PhD researcher Joanne Stephenson, says while this new layer is difficult to observe, its distinct properties may point to an unknown, dramatic event in the Earth's history.&nbsp;

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"We found evidence that may indicate a change in the structure of iron, which suggests perhaps two separate cooling events in Earth's history," Stephenson said. &nbsp;

"The details of this big event are still a bit of a mystery, but we've added another piece of the puzzle when it comes to our knowledge of the Earths' inner core."&nbsp;

There have been continuing discrepancies in estimates of the strength and orientation of anisotropy, with some evidence suggesting that such a model may not be supported by available data.

In the study,&nbsp;the radial dependence of anisotropy within the IC, where the nature of anisotropy has been shown to change anywhere between a 300 and 800&nbsp;km radius.&nbsp;

to provide a robust means of testing this idea,&nbsp;recent travel time data from the International Seismological Centre has been used in conjunction with the neighbourhood algorithm&nbsp;through the examination of an ensemble of models that satisfactorily fit the data.&nbsp;

This can be done with no explicit regularization and without the need for subjective choices associated with binning of phase data. In addition, uncertainty bounds are calculated for anisotropic parameters using a likelihood ratio approach.

The scientists found&nbsp;evidence to suggest that commonly employed spatial averaging (binning) methods may be detrimental to obtaining reliable results. They&nbsp;concluded that there is no significant change in the strength of anisotropy with depth in the IC. Instead, they&nbsp;found a change in the slow direction of anisotropy to 54 degrees&nbsp;within the innermost IC similar to the 650 km radius with a fast direction parallel to the Earth's rotational axis.

Astronomers have discovered the Earth’s hidden layer within its innermost core in a recent study. The study conducted by researchers from The Australian National University (ANU) and was published in the Journal of Geophysical Research: Solid Earth.

Astronomers have discovered the Earth’s hidden layer within its innermost core in a recent study. The study conducted by researchers from The Australian National University (ANU) and was published in the Journal of Geophysical Research: Solid Earth. In this study, scientists used data available from the International Seismological Centre (ISC) to prove that seismic rays travelling parallel to the Earth's rotational axis travel faster than those parallel to the equator. Also read| Why scientists believe life on Earth will perish way earlier than previously thought Traditionally we've been taught the Earth has four main layers: the crust, the mantle, the outer core and the inner core. The idea of another distinct layer was proposed a couple of decades ago, but the data has been very unclear. The lead author of the study, PhD researcher Joanne Stephenson, says while this new layer is difficult to observe, its distinct properties may point to an unknown, dramatic event in the Earth's history. "We found evidence that may indicate a change in the structure of iron, which suggests perhaps two separate cooling events in Earth's history," Stephenson said. "The details of this big event are still a bit of a mystery, but we've added another piece of the puzzle when it comes to our knowledge of the Earths' inner core." There have been continuing discrepancies in estimates of the strength and orientation of anisotropy, with some evidence suggesting that such a model may not be supported by available data. In the study, the radial dependence of anisotropy within the IC, where the nature of anisotropy has been shown to change anywhere between a 300 and 800 km radius. to provide a robust means of testing this idea, recent travel time data from the International Seismological Centre has been used in conjunction with the neighbourhood algorithm through the examination of an ensemble of models that satisfactorily fit the data. This can be done with no explicit regularization and without the need for subjective choices associated with binning of phase data. In addition, uncertainty bounds are calculated for anisotropic parameters using a likelihood ratio approach. The scientists found evidence to suggest that commonly employed spatial averaging (binning) methods may be detrimental to obtaining reliable results. They concluded that there is no significant change in the strength of anisotropy with depth in the IC. Instead, they found a change in the slow direction of anisotropy to 54 degrees within the innermost IC similar to the 650 km radius with a fast direction parallel to the Earth's rotational axis.

Astronomers discover Earth’s hidden layer within its innermost core

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