Tag

Earths Core

All articles tagged with #earths core

science7 days ago•4 min saved

Ancient Geomagnetic Reversals Were Longer and Messier Than Thought

A Newfoundland sediment core reveals two magnetic polarity reversals around 40 million years ago lasting about 18,000 and 70,000 years, far longer and more variable than the commonly cited ~10,000-year reversals. The findings suggest reversals are chaotic and driven by the Earth's geodynamo in the outer core, implying future reversals could last tens of thousands of years and may increase exposure to cosmic radiation with potential climate and biological impacts.

via ScienceAlert|

#brunhes-matuyama #earths-core #geodynamo

science8 days ago•4 min saved

Earth’s Core Could Hold 45 Oceans of Water, New Study Suggests

A Nature Communications study led by Motohiko Murakami suggests hydrogen from early Earth became chemically bound inside the metallic core as iron hydrides, not as free gas or water. If hydrogen accounts for up to about 0.36% of the core’s mass, this could translate to roughly 45 oceans’ worth of water, implying Earth’s surface water may be just a fraction of a much larger deep-water inventory formed during planet formation.

via The Daily Galaxy|

#earths-core #high-pressure-experiments #hydrogen

science18 days ago•326 min saved

Earth's Core May Harbor Massive Hydrogen Reserves, Redrawing Water's Origin

A Nature Communications study estimates Earth’s molten iron core could host a vast hydrogen reservoir—potentially the planet’s largest—amounting to about 0.07% to 0.36% of the core’s weight, equivalent to roughly nine to 45 hydrogen oceans. Using atom probe tomography and high-pressure iron experiments to mimic core formation, researchers examined how hydrogen interacts with silicon and oxygen under extreme conditions. If confirmed, this suggests Earth acquired most of its water during its early growth rather than via late comet deliveries and may relate to heat flow that helps power the magnetic field; however, the estimate relies on indirect methods with uncertainties, and further work is needed to refine the numbers.

via cnn.com|

#diamond-anvil-cell #dongyang-huang #earths-core

science2 months ago•3 min saved

Scientists Discover Onion-Like Layers Inside Earth's Core

A new study suggests Earth's inner core is layered like an onion, with variations in seismic wave speeds explained by the distribution of silicon and carbon in iron alloys, revealing a complex, stratified structure deep beneath the surface.

via ScienceAlert|

#earths-core #inner-core #layered-structure

science2 months ago•6 min saved

Key Earth Discoveries of 2025

In 2025, scientific discoveries revealed Earth's ancient crust in Quebec, explained phenomena like will-o'-the-wisps through microlightning, tracked the movement of magnetic north, discovered a deep-sea methane-based ecosystem, and observed changes in Earth's core, deepening our understanding of the planet's history and inner workings.

via CNN|

#deep-ocean-ecosystems #earths-core #earths-oldest-rocks

science2 months ago•3 min saved

New State of Matter Found Flowing in Earth's Core

Scientists have experimentally demonstrated a superionic state of matter inside Earth's inner core, where carbon atoms move freely within a solid iron matrix, explaining seismic observations and challenging traditional models of Earth's interior.

via ScienceAlert|

#earths-core #iron-carbon-alloy #planetary-interior

science2 months ago•4 min saved

New Discoveries Reveal Complex Layers and States in Earth's Inner Core

A NASA-led study reveals a strong correlation between Earth's magnetic field and atmospheric oxygen levels over the past 540 million years, suggesting that processes in Earth's molten core have played a crucial role in creating conditions suitable for complex life, with implications for understanding planetary habitability and the search for life on exoplanets.

via Earth.com|

#earths-core #geophysical-research #magnetic-field

science4 months ago•5 min saved

Scientists Find Carbon May Have Triggered Earth's Core Crystallization and Preserved Magnetic Field

Scientists from Oxford, Leeds, and UCL discovered that carbon played a crucial role in Earth's inner core formation, reducing supercooling requirements and potentially more abundant than previously thought, which impacts our understanding of Earth's magnetic field and interior dynamics.

via Rude Baguette|

#carbon #crystallization #earths-core

science5 months ago•2 min saved

Mysteries of Earth's Inner Core and Its Impact on Gravity Unveiled

A new study suggests that the presence of about 4% carbon in Earth's core allowed the iron to solidify under high pressure and temperature conditions, explaining how the planet's inner core froze and providing insights into Earth's geological history.

via BBC Science Focus Magazine|

#carbon #earths-core #geology

science5 months ago•3 min saved

Satellites Uncover Mysterious Shifts in Earth's Core

Recent analysis of satellite data from GRACE reveals that processes deep within Earth's mantle, possibly involving mineral phase transitions, are causing changes in the planet's gravity field, with potential implications for understanding Earth's internal dynamics and magnetic field variations.

via The Debrief|

#earths-core #earths-gravity #geophysical-research

science5 months ago•2 min saved

Satellites Uncover Secrets of Earth's Core Changes

Satellites have revealed mysterious changes near Earth's core, suggesting a transformation in deep underground rocks that may be causing the core to leak, providing new insights into Earth's internal structure and its effects on seismic activity and magnetic field.

via Nature|

#earths-core #earths-interior #geophysics

science5 months ago•2 min saved

Earth's Core Reversal and Its Impact on Our Daily Lives

Scientists have discovered that Earth's core has slowed down and appears to have reversed its rotation relative to the crust, a fluctuation that occurs roughly every 70 years and may influence Earth's magnetic field and climate, though the effects are minimal for daily life.

via PCWorld|

#climate-effects #earths-core #geophysics

science6 months ago•2 min saved

Earth's Spin Accelerates, Making August 5 One of the Shortest Days Ever

Earth is spinning slightly faster than usual, making August 5 one of the shortest days on record, likely due to the moon's position, but scientists are still unsure why this acceleration is happening, especially since Earth's rotation has generally been slowing down over millions of years.

via CNET|

#earth-rotation #earths-core #moon-influence

science7 months ago•2 min saved

Scientists Discover Ocean at Earth's Core, Challenging Universal Understanding

Scientists have discovered evidence of a vast amount of water trapped in minerals within the Earth's transition zone, suggesting the existence of an underground ocean at about 410-660 km depth, which could influence our understanding of Earth's water cycle and tectonic processes.

via evidencenetwork.ca|

#earths-core #geology #ocean-discovery

science8 months ago•2 min saved

Scientists Discover Massive Ocean Beneath Earth's Crust, Redefining Our Universe

Scientists have discovered mineral evidence suggesting a vast, water-rich ocean exists deep within the Earth's mantle at 410-660 km below the surface, challenging previous beliefs and raising questions about Earth's water cycle and tectonic processes.

via Farmingdale Observer|

#earths-core #geology #ocean-discovery