Articles tagged with Impact Features
A new study estimates a 1-meter sea level rise by 2100 will affect over 14 million people and $1 trillion worth of property along the Southeast Atlantic coast. The study emphasizes the need for holistic coastal resilience strategies to address multiple climate-related hazards.
The SUPERSLUG initiative aims to forecast the impact of sediment slugs on river catchments and communities. The project will use a range of sensors and numerical models to provide comprehensive predictions of where and how long-term effects might be felt, up to decades or centuries after an event.
A Kobe University researcher found that the massive impact on Ganymede was around 20 times larger than the one that ended the dinosaurs, causing a 1,400km crater and reorienting its axis, according to a new study published in Scientific Reports. The asteroid's diameter was estimated at around 300 kilometers.
A new study by the University of Maryland reveals that NASA's DART spacecraft collision with asteroid moon Dimorphos created a large crater and reshaped it, causing the moon to derail from its original evolutionary progression. The impact also changed Dimorphos' orbit around its parent asteroid Didymos.
Seven rock samples collected along the fan front of Mars' Jezero Crater show evidence of minerals formed in water, suggesting a watery environment. While organic matter cannot be confirmed, these rocks may hold the key to finding remnants of ancient Martian life.
Researchers analyze crater chronology and radiometric dating to understand lunar impact flux, revealing a complex history of impacts that shaped the Moon's geology. The study aims to improve understanding of planetary evolution and orbital dynamics.
A new study using NASA's InSight Lander data reveals that Mars may be getting bombarded by space rocks more frequently than previously estimated. The research team detected eight new impact craters from meteoroids not seen before, including two of the largest impacts ever recorded on the Red Planet.
Researchers estimate that between 280 to 360 meteorites strike Mars each year, forming impact craters greater than 8 meters across. The study uses seismic data from the NASA InSight Mission to make this estimate, which is five times higher than previously thought.
Researchers at Imperial College London have discovered that Mars experiences around 280-360 meteorite impacts per year, exceeding previous estimates. This new tool, known as a 'cosmic clock,' can help scientists date planetary surfaces across the Solar System more accurately.
Researchers analyzed large craters on Europa to determine the ice shell's thickness, finding it to be at least 20 kilometers thick. This conclusion is based on the study of impact cratering and the combination of physical characteristics that could have created such a surface structure.
A Chinese spacecraft returned a sample of the moon's surface, containing minerals that provide insights into its past. Researchers found high-pressure minerals in the sample, which are unusual in lunar rocks.
Researchers confirm ancient lake sediments at Jezero crater on Mars using radar imaging, revealing eons of environmental changes and potential signs of past life. The discovery supports the search for evidence of life in Perseverance rover's soil and rock samples.
Researchers analyzed dolomite rocks and found a high proportion of C-13, indicating strong methane formation by microorganisms in water with low sulphate content. The sediment's chemical development is controlled by crater floor cooling and water supply, not climatic changes.
A team of scientists calculated that most of the Moon's permanently shadowed regions are younger than previously estimated and contain relatively young deposits of water ice. The findings suggest that current estimates for cold-trapped ices are too high, which could impact future missions to the Moon.
Scientists have found evidence of impacts over 3.5 billion years ago but can't find the actual craters. Erosion and geological processes have erased mega-craters, leaving only a few remnants. Researchers studied the Vredefort crater, one of the oldest known impact structures, and found that even large craters can be swept away by erosion.
High-velocity impacts create brief, intense bursts of light known as impact flashes, containing information about the target and impactor. The shape and color of these flashes reveal details about the fragmentation process and ejecta cone formation.
Researchers from Norway and France have found a way to coordinate and recalibrate two conflicting systems of dating the Moon's surface. This new evaluation shows that large parts of the crust are around 200 million years older than previously thought, clarifying the sequence of events in the evolution of the Moon's surface.
The ESO VLT observed the aftermath of the DART impact, showing that the ejected cloud was bluer than the asteroid itself, indicating fine particles. The team found no signs of ice or DART spacecraft propellant, but detected changes in light polarization suggesting altered surface composition.
The Zhurong rover has imaged shallow impact craters and buried impact crater walls in the top five meters of Mars' surface, revealing complex subsurface geology. Researchers found layers of sediment left by past flooding and deposition, but no evidence of water or ice in the present day.
Scientists at the University of Jena have solved a decades-long puzzle by studying quartz samples under extreme pressure. They discovered that characteristic lamellae, which are often used to detect asteroid impacts, form when quartz transforms into a more tightly packed phase under high pressure.
Numerical simulations suggest that Mimas' Herschel impact basin is compatible with a thinning ice shell and geologically young ocean. The results imply that the present-day ocean within Mimas must have been warming and expanding since its formation, potentially making it an emerging ocean world.
A Martian megatsunami was likely triggered by an asteroid collision similar to the Chicxulub impact that led to mass extinctions on Earth. The crater formed as a result of this impact may have caused a tsunami that reached over 1,500 kilometres from the center, measuring up to 250 meters tall on land.
A study published in Nature Communications suggests that small asteroids are probably young because of their loose internal structure and low cohesion. This finding has important implications for understanding the geological development of asteroids.
The SwRI experiment helped predict the effects of NASA's DART impact on asteroid Dimorphos. The study assessed ejecta momentum enhancement created by the space probe's collision, measuring a 3.4-fold increase in momentum transfer.
Researchers identify signs of an impact crater on the Iberian Peninsula for the first time, revealing a 4-kilometer-wide structure surrounded by 20-kilometer-large sedimentary collapse area. The discovery was made after 15 years of research involving international teams from Spain and Europe.
Cornell researchers have helped NASA's Dragonfly mission prepare for a smooth landing on Saturn's moon Titan by analyzing radar images of the Selk crater region. The team characterized the landscape, gauging the rim height of the crater and understanding its geology.
Scientists from the University of Rochester have provided a more accurate simulation of the impact that formed Earth’s largest crater two billion years ago. The new research suggests the impactor was much larger, about 20 to 25 kilometers in diameter, and traveling at a velocity of 15 to 20 kilometers per second.
Researchers located four new craters created by impacts on Mars' surface using data from a seismometer and visuals acquired from the Mars Reconnaissance Orbiter. This is the first time that researchers have captured the dynamics of an impact on Mars.
Research team analyzes impact craters to understand environmental effects of small asteroid collisions. They found distinctive charcoal assemblages, suggesting that fragments of trees shattered by impacts were intermixed with local material ejected from the crater.
The Perseverance rover has collected the first Martian rock samples that could be returned to Earth, shedding light on whether Mars ever hosted life. The rock samples come from the Jezero crater floor, where scientists believe a watery past may have supported life.
Researchers found large impacts can fracture a planet's crust, introducing porosity that increases its potential for life. This discovery has implications for early Earth and Mars, suggesting life could have survived in pore spaces during intense impact periods.
A recent study published in Nature Communications has uncovered the likely Martian origin of a 4.48-billion-year-old meteorite named Black Beauty. The team found that this ancient fragment may have come from a region on Mars similar to Earth's continents, providing valuable insights into our planet's geological past.
A SwRI study examines elliptical craters on Saturn's moons Tethys and Dione, finding unique patterns that indicate the satellites' age and formation conditions. The research suggests a planetocentric impactor population, pointing to the importance of considering gravity-driven impacts when studying object ages.
Researchers investigate protogenetic clinopyroxene inclusions for diamond dating and find implications for understanding Earth's mantle processes. They also study Andean deformation and its relation to flat slab subduction and tectonic inheritance.
Researchers propose that a colossal ancient impact near the Moon's south pole created a heat plume that concentrated rare-Earth elements on the nearside, contributing to the formation of volcanic plains. This explanation sheds light on the Moon's most enduring mystery.
A team of researchers led by Purdue University's Michael Sori found that smaller Martian ice deposits hold key evidence for the planet's orbit and axial tilt's impact on its climate. The study used NASA's HiRISE camera images to analyze layer shapes in an ice deposit, providing insights into Mars' climate history.
Impact craters reveal insights into planetary bodies' evolution, structure, and composition. By studying impact craters on various planets and asteroids, researchers can determine the formation timeline of these celestial bodies and gain knowledge about their interiors.
A researcher developed a computer simulation to predict asteroid impacts and study crater formation. The simulation, built using NASA-designed methods, can generalize results to all metal asteroid impacts.
A University of Alaska Fairbanks scientist has discovered a method for detecting and defining meteorite impact sites that have lost their craters. Gunther Kletetschka found that plasma created at the moment of impact altered the behavior of electrons in rocks' atoms, leading to minimal magnetism.
Only one in four Western Roman emperors died of natural causes, following a power law distribution. The study found that the risk of survival was high when taking the throne, but declined after 13 years, with a sharp increase again at this point.
Scientists have determined the age of the Chang'e-5 moon rocks to be approximately 1.97 billion years old, closing a 2-billion-year gap in lunar sample dating. This precision is crucial for calibrating chronology tools and studying the moon's volcanic history.
The Chang'e-5 mission brought back nearly two kilograms of lunar rocks and dust, including a mix of 'exotic' fragments that may preserve records of other lunar surface areas. The youngest geological area of the Moon's nearside has yielded insights into past volcanic activity
Researchers suggest that Vesta's large troughs were formed by rocks cracking apart due to the planet's weak gravity, contradicting a leading hypothesis. The study uses crater counting methods to explore the relative age of the basins and troughs, indicating they share a similar age.
Researchers found that large asteroids from the outer half of the main asteroid belt strike Earth at least 10 times more often than previously calculated
Researchers have created an AI-powered method to automate the identification of promising lunar landing and exploration areas. The technique uses machine learning and deep learning frameworks to accurately detect craters and rilles with precision rates as high as 83.7%, outperforming existing state-of-the-art methods.
A new model simulates tortuous magma pathways feeding eruptions, identifying three forces: hotspot rise, volcanic rock weight, and buoyancy. This understanding lays foundations for predicting fissure eruptions and reducing dangers.
Research suggests that heat generated by asteroid impacts could enable aqueous alteration and organic solid formation, increasing the number of potential sources of water and life's origins. The study found that craters over 1km in radius can support organic substance formation within a 2 AU distance from the impact point.
Ancient dune fields in Gale crater provide evidence of variable wind directions, shedding light on Mars' climate evolution. The findings suggest that the Martian surface may have been less hospitable to life than previously thought, with a vast expanse of desert sand representing a snapshot of time.
The Curiosity rover has explored the stratigraphy of Gale crater, providing insights into Mars' early climatic history. The study reveals alternating wet and dry depositional environments recorded in the sedimentary sequence, shedding light on the Red Planet's environmental changes during the Hesperian age.
Researchers from Brown University have discovered a previously unknown type of ancient crater lake on Mars that differs from other Martian crater lakes. The crater was likely fed by runoff from a long-lost Martian glacier, which suggests the planet's early climate may have been warmer and wetter than previously thought.
A team led by Chris Yakymchuk at the University of Waterloo found that a three-billion-year-old crater in Greenland is inconsistent with an impact crater, but instead formed through normal geological processes. The discovery was made after a 40-million-year delay from the initial proposed meteorite impact date.
Researchers have found asteroid dust inside a Chicxulub impact crater, confirming the link between asteroid impacts and dinosaur extinction. The discovery seals the deal, with elevated levels of iridium and other asteroid elements matching those in geologic layers worldwide.
Research reveals that airborne dust plumes are produced by sliding blocks of dry ice each spring, which kick up sand and dust along the way. This process carves and modifies linear gullies on the slopes of a Martian sand dune.
Researchers from Skoltech and Russian Academy of Sciences have surveyed the newest known 30-meter deep gas blowout crater on the Yamal Peninsula, forming a 3D model to study its structure and composition. The 3D model reveals a unique underground cavity with an elliptical shape and a circular dome, providing clues about the crater's en...
A new study by Harvard researchers suggests that a comet originating from the Oort cloud was bumped off-course by Jupiter's gravitational field, increasing the rate of impacts on Earth. The theory provides a satisfactory explanation for the origin and composition of Chicxulub impactor, potentially shedding light on other similar craters.
A Southwest Research Institute scientist has updated Mars chronology models to suggest that terrains shaped by ancient water activity on the planet's surface may be hundreds of millions of years older than previously thought. The new model also provides a revised age for Isidis Basin, now estimated to be 4-4.2 billion years old.
Researchers used data from Curiosity rover and Earth comparisons to determine temperature impact on Martian rocks, finding it was the biggest factor in weathering sediments.
Researchers reconstruct ancient Sunset Crater eruption, revealing high-explosivity phase with ash reaching 20km high. The study highlights the importance of carbon dioxide in volcanic eruptions and its potential impact on global climate.
Researchers from Cornell University and NASA's Jet Propulsion Laboratory discovered evidence of massive floods in Gale Crater, suggesting conditions for microbial life. The flooding, likely caused by a meteoritic impact, deposited unique geological structures indicating flowing water and wind on Mars.
Asteroid Bennu's surface boulders hold secrets to its 1.75 million-year history, which scientists studied through impact crater analysis. The findings provide crucial context for the returned sample, allowing researchers to understand the asteroid's geology and composition.