Articles tagged with Earth Surface
A University of Iowa-led study found that Southern California earthquakes increased stress on the Garlock Fault, a major earthquake fault line. The research showed 'aseismic creep' along a 12- to 16-mile section of the fault, indicating it is sensitive to stress changes.
A team of scientists found that two-thirds of the Earth's surface moves faster than the underlying mantle, with the surface dragging the interior. The study suggests that the balance of forces changes over geological time, especially for continents.
Scientists discovered significant amounts of water trapped inside diamonds, which formed hundreds of kilometers deep in the planet. The findings suggest that this subterranean water may have originated from surface oceans and played a crucial role in the Earth's natural carbon balance and life emergence.
A new study published in Geosphere uses GIS-based analysis to reveal the complex geometry of the Rose Canyon fault zone beneath downtown San Diego. The researchers compiled data from hundreds of individual reports and created a centralized geodatabase to examine the fault zone's shape and potential hazard.
A recent study reveals that half of the Earth's land surface remains relatively wild, but fragmented into small pieces, posing a threat to their future. The report identifies high-priority areas for protection, including remote boreal forests and tropical rainforests.
A study published in Advances in Atmospheric Sciences found that air pollution under clear skies significantly reduces the amount of sunlight reaching Earth's surface. The study highlights the negative impact of air pollution on renewable energy harvesting and associated economic burdens, as well as its effects on air purity.
Scientists have detected the presence of an ancient reservoir in the Earth's mantle using helium isotope ratios in superdeep diamonds. The reservoir is estimated to be at least as old as the Moon and is located between 410 and 660 km below the surface.
Scientists have discovered that Earth's magnetic field reversal took at least 22,000 years to complete, contradicting previous estimates of up to 9,000 years. The new analysis provides a detailed look at the turbulent time when the field weakened and partially shifted before finally reversing.
Researchers propose that surface erosion events played a crucial role in starting and maintaining plate tectonics. Continental sediments act as a lubricant for subduction, reducing friction between plates.
Geoscientists have found evidence that material from the transition zone in Earth's mantle can percolate to the surface to form volcanoes. This discovery provides a new understanding of the relationship between the transition zone and volcanism, with implications for global geodynamics and the evolution of our planet.
Researchers found a strong correlation between meltwater runoff and seismic activity in the region, suggesting that seeping water may trigger small earthquakes. The study suggests that the shallow nature of the earthquakes is due to the unique geology of the area, with steeply dipping rock layers acting as a conduit for meltwater.
Researchers found that microbes consume and trap carbon sinking into the trench off Costa Rica's Pacific coast, potentially influencing geological processes on similar scales as volcanoes. This discovery has important implications for understanding carbon movement from Earth's surface into its interior over geological timescales.
Researchers investigated surface deformation caused by a 6.5 magnitude earthquake using field investigations, geologic data, seismic reflection profiles, and earthquake relocation results. The study suggests the Pishan earthquake is a folding event that occurred in the upper crust.
A global study found that melting glaciers worldwide have caused a significant increase in global sea levels over the past 30 years, with 19,000 glaciers losing an average of 27 millimeters of ice since 1961. The largest contributors were glaciers in Alaska and Patagonia, resulting in a 335 billion-ton annual loss of glacier ice.
The newly digitized maps provide details of glacial tills, sands, and gravels on the earth's surface, using a unique standard color for each material. The digital maps offer more accurate and convenient information for spatial analyses, with features such as layering and GIS overlay capabilities.
Researchers have reconstructed the geological history of a remote sector of the African Rift Valley using fieldwork and numerical modeling. The findings indicate that the rift valley formed around 3.7 million years ago and was short-lived, with deformation migrating westward into the Lake Turkana region.
The OSIRIS-REx mission revealed unexpected discoveries on asteroid Bennu, including particle plumes and a rugged terrain. The team adjusted their flight plans due to the rough surface, which challenges their sample collection strategies.
Researchers have simulated surface roughness creation and fractal characteristic emergence on multiple scales. The study proposes that subsurface crack propagation drives the self-affine nature of rough surfaces, with implications for earthquake prediction and material durability.
A recent study found that humans are responsible for more than 25% of vertebrate deaths globally. The research analyzed 42,755 animal deaths and found that 28% were directly caused by humans. Larger animals and adults are more likely to be killed by humans.
Computer simulations of planet formation suggest that the presence of radioactive elements from a massive star may have created a wet system on Earth, while also forming ocean worlds in other systems. Researchers found that without these elements, the inner terrestrial planets of our solar system could be very dry and hostile.
Astrophysicist Wendy Panero proposes a new approach to determining a planet's habitability by analyzing its mass, radius, and star composition. This method could help scientists identify the most promising candidates for supporting life in the universe, saving time and resources.
The Deep Carbon Observatory has revealed that the deep biosphere, a subsurface ecosystem, hosts an immense amount of life with 15-23 billion tons of carbon, far exceeding human carbon mass. This discovery expands our understanding of the tree of life and the potential for life in extreme environments.
Microorganisms living underground have a total carbon mass of 15-23 billion tons, vastly more than humans. The deep biosphere has a volume of between 2 and 2.3 billion cubic kilometers, almost twice the volume of all oceans.
The International Astronomical Union has adopted the new ICRF-3 reference frame with global validity since January 2019. It provides improved precision for positioning systems like GPS and space probes, enabling accurate navigation in the sky and on Earth's surface.
Researchers developed a more comprehensive method for measuring the Earth's boundary layer depth using radar, which constantly ebbs and flows. This improvement in accuracy can lead to better forecasts for severe weather events, air pollution, and wildfire forecasting.
A new study using satellite data found that global rivers and streams cover about 773,000 km2 of the non-glaciated land surface, a 44% increase over previous estimates. The increased coverage suggests large-scale impacts of human modification on river networks in developed regions.
A new Stanford study has re-examined the relationship between seismic data and earthquake prediction, concluding that foreshocks are unlikely to provide accurate warnings of impending earthquakes. Researchers found no evidence supporting the idea that slow slip or cascade models can be used for predictive purposes.
Researchers at UMass Amherst and Japanese scientists report developing new techniques for modeling tsunami risk in the Nankai Trough, a region predicted to generate a magnitude 8-9 earthquake within the next few decades. The team's GPS-based methods simulate tsunami inundation and validate previous findings.
Researchers used the Advanced Photon Source to identify naturally occurring water at 410 kilometers below the Earth's surface, in the form of Ice-VII, a cubic crystalline form of water. This discovery could change our understanding of how water circulates deep in the Earth's mantle and how heat escapes.
Researchers from Southern Methodist University used radar satellite imagery to detect significant ground movement across a 4,000-square-mile area in four Texas counties. The study found that the movement is associated with decades of oil activity and its effect on rocks below the surface.
Researchers have discovered a diamond containing the fourth most abundant mineral in Earth, calcuim silicate perovskite, at the surface. This finding suggests that oceanic crust is recycled into the lower mantle, with potential implications for our understanding of Earth's core.
Analysis of Réunion volcanic rocks indicates that their source material originates from isolated regions of the mantle with distinct chemistry. The discovery provides a unique fingerprint for the age and history of these ancient mantle pockets.
A global precipitation database analysis suggests that approximately 14% of the Earth's surface experiences annual precipitation dependence on the previous year, while 76% does not. This finding provides a framework for assessing long-lasting changes in rainfall by considering natural variability.
Recent publications by Dr. Joseph Michalski and colleagues cast doubt on the idea of surface life evolving on Mars due to extremely cold and dry climate conditions. However, they suggest subsurface life is a promising option, focusing exploration on hydrothermal deposits.
Researchers quantify viruses swept up into free troposphere, carried thousands of km before being deposited back onto Earth. The majority of viruses were found to have originated from sea spray, indicating long-range transport through the atmosphere.
Scientists analyzed geochemical and isotopic markers to suggest a cosmic impact triggered the disaster, which consumed 10% of the Earth's land surface in fires. The study provides evidence for human cultural shifts and population declines during this period.
Researchers found highly oxidized iron in garnets from diamonds at a depth of 550 km below the Earth's surface, contradicting expectations about iron oxidation in the mantle. This discovery suggests that molten carbonate may have oxidized rocks to form diamonds.
Scientists analyzed NASA's Aqua satellite records to find that rising maximum temperatures are affecting every ecosystem on the planet, from ice sheets to tropical forests. Temperature extremes coincided with severe droughts and heat waves across the globe, particularly in tropical regions and northern hemisphere.
A team of researchers used JUQUEEN supercomputer to simulate the structure of silicate glasses at ultra-high pressures, gaining insights into the Earth's formation and its impact on our surface. They found that oxygen atoms are more compressible than silicon atoms under high pressure, leading to different glass structures.
Scientists use a simulation program called DaMaSCUS to study how dark matter particles interact with normal matter, potentially affecting detector performance. The researchers found that if dark matter interacts strongly with atoms, deep site detectors may struggle to detect it.
Researchers at University of Toronto and Istanbul Technical University propose an 'active drip' model for the formation of the Central Anatolian Plateau, where the lower tectonic plate has dripped below Earth's surface. This process is linked to the planet's crust and upper mantle thickening and sinking into the lower mantle.
Scientists have found evidence that komatiites, three-billion-year-old volcanic rocks found within the Earth's mantle, had a different composition than modern ones. This discovery may provide new information about the first one billion years of Earth's development and early origins of life.
Researchers found that extreme methane rainstorms occur frequently on Titan, creating massive floods in deserts and shaping the moon's surface. The storms are correlated with the formation of alluvial fans, similar to those on Earth.
Researchers found that climate change led to a sharp rise in volcanic activity as the Mediterranean Sea dried up, contradicting previous hypotheses. The study used numerical models to test scenarios and confirmed that the massive loss of sea level was the primary cause of increased magmatic activity.
A new study suggests that as Earth's climate warms, global unforced temperature variability will likely decrease, while local regions could see sharp increases in natural temperature variability. This shift is due to albedo feedback, which reduces the impact of melting sea ice on amplifying natural temperature fluctuations.
A massive circular blob of partially molten rock, approximately 800 kilometers in diameter and 15 kilometers high, has been detected at the core-mantle boundary beneath Iceland. This discovery suggests a link between the ulvazs and rising plumes that feed active hotspots.
The study found that VLF radio communications can interact with particles in space, creating a barrier around Earth. This 'barrier' corresponds to the inner edge of the Van Allen radiation belts and may help remove excess radiation from the near-Earth environment.
A new estimate suggests that dryland forests, which cover 40% of the Earth's land surface, are more extensive than previously thought, with an additional 467 million hectares reported. This increase in forest area increases current estimates of global forest cover by at least 9%
Scientists at McGill University propose a new theory on how Earth's crust was created, suggesting that silica-rich minerals condensed and fell back to earth over about a million years. This process, called aerial metasomatism, could provide clues for the search for life on exoplanets.
Researchers from Caltech discovered that fast ruptures along thrust faults can cause one side of the fault to twist away from the other, opening a gap that then snaps shut. This mechanism has the potential to change our understanding of how tsunamis are generated.
Researchers estimate the total volume of lake water to be around 184,000-199,000 km³, highlighting its relative scarcity compared to the ocean's massive 1.3 billion km³. Human activities like climate change and water diversion significantly impact lake quality and quantity.
Researchers found that forests cool the surface in temperate and tropical regions but warm high-latitude areas through mechanisms like water and heat transfer, evapotranspiration, and convection. This new insight highlights the importance of forest conservation in mitigating climate change.
A new research project aims to explore the mechanisms causing earthquakes in the lower crust, accounting for 30% of intracontinental seismic activity. By combining geological and satellite observations with laboratory work, scientists hope to increase knowledge of geological processes and mitigate the dangers posed by such activity.
Scientists discover Quaternary ruptures along the Leech River fault, capable of producing earthquakes MW >6, highlighting seismic risk exposure. A new continent, Zealandia, geologically separate from Australia and Antarctica, is identified as a major geological entity.
The Space Environment In-Situ Suite (SEISS) instrument on NOAA's GOES-16 satellite is successfully sending data back to Earth, providing insights into charged particle fluxes. This information will help the Space Weather Prediction Center issue early warnings of high-flux events, protecting lives and equipment from radiation hazards.
Analysis by Carnegie's Marion Le Voyer and Erik Hauri has doubled the world's known finds of mantle carbon, revealing a more complex distribution than previously thought. The team studied tiny magmatic inclusions trapped inside solid crystals that protected them from degassing during magma ascent and eruption.
A new study links rapid increase in sediment burial of carbon-rich organic matter to the surge in atmospheric oxygen during the Cambrian explosion. This process prevented dead plant material from burning and allowed oxygen to build up. Fossil fuel formation played a crucial role in supporting advanced animal life on Earth.
A decade-long study in southern UK reveals an annual mean of 3.37 trillion insects migrating above the region, comprising 3200 tons of biomass. The majority of migration occurs during daytime, with intensity greatest on warm days.
A new study reveals that roads now fragment land to an extent that only 7% of road-created patches are greater than 100 square kilometers. The research highlights the significant impact of roads on the environment, including deforestation and fragmentation, chemical pollution, noise disturbance, and increased wildlife mortality.
Researchers studied olivine, a key mineral in Earth's mantle, to understand plate tectonics and measure the Earth's surface thickness. They found that tectonic plates are approximately 100 kilometers thick, contradicting previous theories.