Articles tagged with Avalanches
Researchers propose a new analytical approach to determine the limiting velocity of an avalanche crack, revealing that it may propagate at supersonic speeds in certain situations. The findings reconcile conflicting interpretations and provide insights into designing structures impacted by snow masses.
A recent study compares two devastating ice avalanches in the Indian Himalayas and Switzerland, revealing drastically different consequences despite similar physical characteristics. Climate change is destabilizing high mountain slopes due to glacier retreat, permafrost thaw, and extreme precipitation, making such hazards more frequent.
Research from the University of Washington reveals that warming winters in the Pacific Northwest are leading to more rain-on-snow events, icy crusts, and complex avalanche forecasting. The study's findings suggest that regions like Eastern Washington, Idaho, and Montana may see an increase in avalanche risk due to warmer temperatures.
Researchers have confirmed the existence of hidden motions in granular materials like soil and snow, which can control their movement. This discovery could help understand how landslides and avalanches work, as well as benefit industries such as construction and grain filling.
Climate change may lead to more frequent and deadly avalanches in the California range, posing a significant threat to endangered bighorn sheep. The species' fragile existence is threatened by reduced forage and increased avalanche mortality.
The Antarctic Canyon Experiment (ACE) aims to assess the causes and effects of turbidity currents, also known as underwater avalanches, in the Southern Ocean. Researchers hope to develop a better understanding of Antarctica's role in regulating Earth's climate and mitigating carbon emissions.
A team of physicists studied the unique motion of Champati seeds rolling down slopes, revealing a spread-out, then collapse-like behavior akin to rock avalanches. The research may provide valuable insights into geological flows and contribute to resolving challenges in this area.
The study analyzes 40 years of avalanche data, showing a significant increase in survival rates from 43.5% to 53.5% and a decrease in rescue time from 45 minutes to 25 minutes.
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.
Researchers mapped a giant underwater avalanche that grew 100 times in size, eroding a 400km canyon and traveling 2000km across the Atlantic Ocean seafloor. The event was so powerful it carried boulders over 130m up the side of the canyon.
Researchers have analyzed over a thousand images of snow to study its optical properties. The findings show promise in improving avalanche safety and autonomous car technology, but more data is needed.
Researchers at Caltech have demonstrated quantum Barkhausen noise, which is the collection of little magnets flipping in groups. This effect is caused by quantum tunneling and co-tunneling, leading to macroscopic changes in magnetization, even without classical effects.
Researchers developed a compact microscope using a single photon avalanche diode array detector, enabling super-resolution imaging with improved signal-to-noise ratio and spatial resolution. The system also combines fluorescence lifetime measurements for enhanced structural specificity.
Researchers at the Complexity Science Hub developed a mathematical method to analyze armed conflict data, identifying causal links between battles and predicting future conflicts. The approach, inspired by physics and biophysics, reveals how violence spreads like avalanches across Africa and can be applied to other armed conflicts.
Researchers develop innovative data compression scheme to facilitate multispeckle diffuse correlation spectroscopy with high pixel resolutions, enabling non-invasive measurement of brain blood flow. The scheme uses field-programmable gate array compression to alleviate computational burdens and expand the use of SPAD cameras in biomedi...
Researchers analyzed concentric terraces around the Santorini caldera to better understand massive underwater volcanic eruptions. The study found that sedimentation waves can impact the sea surface, creating tsunamis and scouring the seafloor during shallow submarine eruptions.
Jay W. McDaniel, assistant professor at the University of Oklahoma, receives a CAREER Award to develop a custom UAV-based radar suite for measuring snow depth and distribution. The project aims to improve understanding of snow characteristics and their impact on thermal balance between terrain and atmosphere.
Two new studies examine the nature of China and Tibet's dynamics and a possible global organic carbon record. A model for natural avalanches also presents findings on long-lived postcollisional exhumation and cooling, while a novel technique is used to reconstruct paleohydrology from fluvial-deltaic deposits.
A new study warns that climate change will negatively impact mountain landscapes and human activity, increasing risks of natural hazards like avalanches and river floods. Mountain communities are also affected, with traditional practices like transhumance and agriculture dying out due to changing weather patterns and water scarcity.
Researchers recover data from sensors swept away by massive underwater avalanche in Congo Canyon, providing new insights into sediment flow and seabed cable breakages. The study reveals the hazards of powerful turbidity currents and their impact on global communications.
Researchers at EPFL and ETH Zurich propose a rational explanation for the deaths of nine hikers in 1959, attributing their injuries to a small slab avalanche. The team's work was met with intense media attention and criticism from conspiracy theorists before being accepted by the Russian scientific community.
Researchers developed a new avalanche forecasting method using computer simulations of snow cover, which can detect weak layers and identify hazard in a different way. The approach showed consistent results with observed frequencies over 16 years, offering potential to support forecasting in the future.
Researchers have discovered that the Matterhorn sways at a frequency of 0.42 Hertz, oscillating roughly in a north-south direction, with similar frequencies in an east-west direction. The mountain's summit experiences amplified vibrations up to 14 times stronger than the reference station at its base.
The brain's globally sparse yet locally compact modular topological characteristics reduce resource consumption for establishing connections. The research model shows that rewiring the network to a more biologically realistic modular structure significantly reduces running consumption and building cost.
A new model has been developed to simulate the correlation between iceberg size and tsunami amplitude, providing insight into glacial rupture mechanisms. The study's results can refine sea-level rise predictions and provide detailed information about icebergs' mass loss.
Researchers from Heidelberg University combined historical images and maps with current data to track glacier changes in the Nanga Parbat Massif. The study shows that the glaciers have been shrinking since the 1930s, but at a slower rate than other Himalayan regions due to avalanche activity and debris cover.
A massive rock and ice avalanche in February 2021 killed over 200 people in Uttarakhand, India. The disaster was exacerbated by exceptional avalanche height, rock-to-ice ratio, and downstream hydroelectric infrastructure, underscoring the need for sustainable planning.
The collapse of Aru glaciers has sent at least 7.1 million cubic meters of ice into downstream lakes, disrupting regional ecosystems. The volume increase of Memar Co Lake is 30% faster than the previous rate, and it may merge with Aru Co Lake within 7-11 years.
Researchers Gaume and Puzrin investigate the 1959 incident where nine hikers died under unclear circumstances. They propose a mechanical explanation, but point out gaps in the investigation that contradict their theory.
Researchers at the University of Illinois discovered a continuous transition between solid and liquid states in soft materials. This new understanding could lead to more accurate predictions for phenomena like mudslides and avalanches.
Bioengineers at Stanford University have developed a method for forecasting black swan events, which are highly unlikely but massively consequential incidents. The method is based on analyzing long-term data from three ecosystems and has potential applications in healthcare, environmental research, economics, and politics.
The new LiDAR receiver technology boasts long-wavelength sensitivity and ultra-low noise, promising improved performance and eye safety. The invention enables higher-power operation within the 2-micrometer window, considered eye-safe for night-vision imaging applications.
Researchers at Rice University have simulated a complex network mechanism by which the brain retains information. The study suggests that cytoskeletal avalanches within neurons' dendritic spines may be one way they retain new information.
Complex systems, like social networks and avalanches, exhibit similar characteristics when left to develop on their own. In a groundbreaking experiment, researchers from the University of Cologne observed self-organized criticality in a gas of potassium atoms, demonstrating universal avalanche behavior.
Cornell researchers have modeled crackling noise in two dimensions, using a combination of mathematical schemes to solve a decades-old problem. The study sheds light on the behavior of avalanches and crackling noise near critical points, making an important step toward a fuller understanding.
Researchers at University College London analysed Martian landslide structures to understand their formation. The study found that high-speed rock particles and vibrations could create the unique ridges and furrows, contradicting the idea of icy substrates.
Researchers developed a mid-infrared picosecond laser-driven electron avalanche technique to detect electric charges and chemicals in air. They measured electron densities down to one part per quadrillion, equivalent to picking out one free electron from a million billion normal air molecules.
An international study by Eurac Research has established benchmarks for assessing avalanche victim survival using core temperature and serum potassium levels. The study found that rewarming only results in survival in a small proportion of cases, but provides doctors with reliable indicators to make informed treatment decisions.
Physicists at UMD developed a new method to detect radioactive material remotely using an infrared laser beam. The technique induces an electron avalanche breakdown near the material, allowing detection from a distance. With further development, it could be used to scan trucks and shipping containers at ports of entry.
Moritz Lang and Mikhail Shkonikov from IST Austria have discovered a new property of the Abelian sandpile model, showing that it can exhibit dynamics similar to those of real-world sand dunes. The researchers used a specific method to add sand grains to the model, which induced self-similar fractal patterns reminiscent of the Mandelbro...
A team from the University of Illinois has developed a new material and technique to study dislocation avalanches in metals. By observing how dislocations interact at the nanoscale, researchers gained insights into the mechanism behind catastrophic failure, which can aid in developing stronger materials.
A young researcher at EPFL and SLF created a highly accurate digital simulation of an avalanche, offering insight into its complex mechanics. The simulation takes into account the snow's behavior as both a solid and fluid, allowing for more effective risk management in the mountains.
Researchers reconstructed the 1929 Grand Banks underwater avalanche to better understand its properties and implications for seafloor infrastructure. The study found that giant avalanches like this one pose a major geohazard to telecommunication cables and oil pipelines, with potentially catastrophic consequences.
UNIGE researchers analyzed tree rings to link global warming to increasing frequency and intensity of avalanches in the Himalayas. The study found that rising temperatures have led to bigger avalanches traveling greater distances, threatening infrastructure development and socio-economic stability in regions like Himachal Pradesh.
The new guidelines emphasize avalanche avoidance as a primary tactic for preventing injuries and deaths. They also provide detailed recommendations for rescue protocols, including the use of transceivers, probes, and shovels, as well as guidelines for resuscitation in burial situations.
A new computer model is being developed to simulate the mechanical properties of snow and predict its behavior in various scenarios. This model will enable more accurate forecasts for avalanches and help determine the load on buildings caused by snow.
A deadly avalanche in 2016 killed nine nomadic yak herders in western Tibet, with climate change cited as a likely cause. Researchers found that meltwater lubricated the ice, allowing it to flow quickly down the mountain.
A team of researchers found that rapidly proliferating yeast cells can exert forces of up to 150 psi, equivalent to nearly five times atmospheric pressure. This jamming phenomenon may contribute to microbial pathogenesis and biofouling, with potential consequences for environmental systems.
Research found that traveling in groups of four or more people carried a higher relative avalanche risk than for individuals or groups of two. Additionally, solo backcountry exploration offered protection from avalanche risk, but at the cost of other hazards like injuries and fatigue.
A 54.5 million cubic meter snow avalanche occurred in western Colorado, killing three people. The study used large-scale field mapping and seismic signals to analyze the avalanche's movement phases, shedding light on rock-avalanche modeling and ongoing hazards.
Researchers analyzed neuronal avalanches in the human brain during perceptual tasks, discovering a high degree of similarity in temporal and spatial distribution. The study provides an analytic 'biometric' technique to link MEG-generated data to specific individuals.
Researchers applied established methods to study wood, finding a universal pattern of response similar to avalanches. The discovery could help predict failure and prevent damage in industries like furniture and construction.
The brain's electrical activity displays statistical hallmarks of criticality, a state where information processing is optimized. Spontaneous avalanches in the brain hold it at this balance point, with sensory input momentarily pushing the cortex away but adapting back to optimal critical regime.
A new system combining GPS and radar measures snow properties on slopes, enabling continuous and non-destructive monitoring of snow volumes and liquid water content. The method promises to enhance forecasting of avalanches and spring floods in Alpine areas.
Scientists develop new avalanche monitoring method using infrasound detectors to detect and track deadly snow slides. A community-driven framework for climate reconstructions aims to study the past 2000 years' paleoclimate.
Debris avalanche landslides can drastically modify the shape and nature of surrounding landscapes, changing water drainage systems. Researchers studied the Pungarehu debris avalanche deposit at Taranaki volcano, New Zealand, to gain insights into transport and emplacement mechanisms.
Researchers at Queen Mary University of London have discovered that the amount of snow needed to trigger an avalanche in the Himalayas can be up to four times smaller than in the Alps. This finding has significant implications for mitigating natural hazards and safeguarding people on mountain villages, roads, and ski resorts.
Researchers have developed a smartphone-based system that can locate buried avalanche victims using satellite navigation, promising faster and more precise rescue operations. The Galileo-LawinenFon system uses the combined signals of GPS, Galileo, and GLONASS satellite systems to pinpoint accident victims in seconds.
Researchers discovered that a record-breaking landslide at a Utah copper mine triggered 16 small earthquakes due to two massive rock avalanches. The slide was the largest nonvolcanic landslide in modern North American history, covering New York's Central Park with about 20 meters of debris.
Researchers studied computer simulations and found distinct forms of events, which were later confirmed through experiments. The study's findings show that the shape of an avalanche holds more information than traditional indices.