Articles tagged with Volcanic Processes
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A large-scale measurement campaign with over 500 seismic stations has produced the first high-resolution image of the structures beneath the Eifel volcanoes. The data reveals a magma reservoir deeper and differently oriented than previously assumed, with surprising findings on recent microearthquakes and fluid accumulations in the crust.
Shear forces in volcanic conduits can create gas bubbles, leading to a decrease in pressure and preventing explosive eruptions. This process can occur even in magma with high gas content, explaining why some volcanoes flow gently despite being potentially explosive.
A team of researchers has identified a new mechanism behind the 2025 Santorini earthquakes, finding that magma intrusion waves triggered the seismic unrest. The study used advanced machine learning techniques to analyze ground vibrations recorded by seismometers and inferred the movement of pressurized magma with unprecedented detail.
Scientists have detected tremor signals at the Oldoinyo Lengai volcano in Tanzania, revealing details about magma movement and volcanic activity. The findings provide valuable insights into the dynamics of magma movement and offer a step forward for volcano seismology.
An earthquake swarm in Santorini was triggered by magma displacement, generating over 28,000 recorded earthquakes. The study reveals the chain of events that led to this seismic activity, including a hydraulic connection between two volcanoes.
A team from UNIGE and INGV created a high-resolution 3D image of Vulcano's internal structure using seismic ambient noise tomography and AI. This breakthrough understanding of volcanic structures may lead to more accurate predictions and evacuation plans.
Researchers used tiny crystal clots to analyze pressure changes before the 2006 Augustine Volcano eruption, which increased pressure enough to break rocks and cause the eruption. The method complements geophysical modeling, increasing understanding of magmatic processes.
A 2.35-billion-year-old meteorite offers fresh insights into the Moon's volcanic history and suggests ongoing internal heat generation processes. The rock's distinct composition provides new constraints on when and how volcanic activity occurred on the Moon.
Researchers found that thick ice cover suppressed volcanic eruptions, but as glacial ice melts, pressure builds and magma is released, leading to more frequent and explosive eruptions. This phenomenon could occur worldwide, including Antarctica, and may have global climate impacts, including long-term warming.
Research at the University of Southampton reveals a single, asymmetric plume beneath the Afar region in Ethiopia, which is pulsing like a heartbeat. The team found distinct chemical signatures in volcanic rock samples, suggesting that the plume is dynamic and responsive to tectonic plate movement.
Scientists from the University of Göttingen have made a groundbreaking discovery, finding ruthenium in volcanic rocks on the islands of Hawaii. The finding suggests that material from the Earth's core is leaking into the mantle above, challenging previous assumptions about the planet's internal dynamics.
The 'Isle of Fire' video series, developed by Time for Geography, provides a 50-year perspective on the 1973 Heimaey eruption and its impact on volcanic hazard management. The series features cutting-edge techniques in eruption reconstruction and forecasting, as well as modern management strategies.
A new study has investigated seismic signal shear-wave splitting to provide early warnings of dangerous eruptions. The research team discovered that the amount of splitting doubles before a larger, more explosive eruption, indicating a useful relationship between the parameter and the size of the eruption.
Geologists have connected a 120-million-year-old 'super-eruption' to its source, revealing insights into Earth's complex geological history. The discovery provides a more complete history of the Pacific Ocean basin and sheds light on volcanic activity in the region.
Scientists analyzed lava flows and tracked displacement over thousands of years to understand continental deformation. The study found the Tuz Gölü Fault Zone is slowly pulling apart, providing insights into tectonic plate collisions.
Researchers found that melting ice sheets in North America and Greenland may have increased horizontal motion of plates by 25% and up to 40% at the Mid-Atlantic Ocean Ridge. This could lead to an increase in volcanic eruptions in Iceland.
A new study by Texas A&M University researchers has revealed insights into Mars' geological history and potential for ancient life. The team analyzed diverse volcanic rocks in the Jezero Crater, providing a window into the planet's distant past and signs of altered olivine.
Researchers use artificial seismic waves to image the ground beneath Yellowstone's caldera, determining the top of the magma chamber is 3.8 kilometers below surface and comprised of volatile gases and liquids. The findings indicate the long-dormant volcano is not in immediate danger of eruption.
A recent study found that volcanic ash from Kīlauea prompted a rare and large summertime phytoplankton bloom in the North Pacific Subtropical Gyre. The blooms were stimulated by iron and other trace elements in the ash, producing massive growth of nitrogen-fixing microbes and organic matter.
Researchers at Washington University in St. Louis propose a new mechanism to explain Venus' geology: convection in the crust. If true, this process could influence volcano placement and type. High-resolution gravity measurements could detect differences in crust temperature and density.
Researchers found a synchronization between geological climate archives and large-scale volcanic eruptions in the Deccan Traps, which may have caused mass extinctions. The study suggests that changes in Earth's orbit around the sun regulate the amount of incoming solar radiation, affecting global climate patterns.
Scientists have discovered that channels carved by rivers have distinct curves compared to those cut by lava or ice. The research could be used as a diagnostic tool for sinuous channels on other worlds with unknown fluid origins.
Researchers uncover high nitrogen isotope values in 2.75 billion-year-old stromatolites, suggesting ammonium accumulation in deep waters and upwelling bringing it to shallow waters. This finding supports the proposal that volcanic activity fueled early life's growth.
Research team finds that heavy Mg isotopic signatures in volcanic rocks can be explained by partial melting of serpentinite-dominated mélanges. The study proposes a novel model involving diapiric rise and melting of these mélanges, which aligns with geochemical characteristics of arc magmas.
Researchers at ETH Zurich discovered tiny ice quakes deep inside ice streams, explaining the discrepancy between simulations and satellite measurements. The findings impact sea-level rise estimates and may reveal fault planes in ice cores, providing a better understanding of ice stream deformation.
Researchers used Re–Os dating to uncover the timing of Japan's geological history, revealing key insights into the region's evolution. The study focused on Besshi-type VMS deposits, which provided precise markers for the timing of subduction and ridge subduction beneath Japanese Islands.
Researchers have discovered that Kīlauea and Maunaloa, Hawai‘i's two most active volcanoes, share a common source of magma within the Hawaiian plume. This magmatic connection results in broad correlations between changes in their lava chemistry.
Researchers found a correlation between silica content and volcano tremor strength, suggesting that more viscous magma causes increased tremor amplitude. The study highlights the potential of combining petrological data collection with geophysical data to improve eruption forecasting.
Researchers have refined the timing and duration of Ocean Anoxic Event 1a, an extreme environmental disruption that caused significant extinction among plankton. The study determined OAE 1a lasted for just over 1.1 million years, providing valuable insights into Earth's climate and ocean system.
The expedition aims to understand how extreme geohazards interact and improve the long-term safety of coastal regions. Researchers use innovative technologies to collect real-time data on earthquakes, ground movements, and volcanic gases.
The study discovered significant alterations in the region's state of stress and deformation following the 1975 Kalapana earthquake. The researchers found that Kīlauea's south flank experienced greater displacement prior to the earthquake, pointing to changes in mechanical properties influencing seismic activity.
Researchers from Göttingen University identified the low crystallisation temperatures and groundwater origin of amethyst geodes in northern Uruguay. The study proposes a new model explaining their formation, which could improve exploration techniques and lead to sustainable mining strategies.
Astronomers at Cornell University studied Io's volcanoes to understand tidal heating and its role in planetary formation. They found active volcanoes at the poles, which may regulate tidal heating and provide insight into the moon's internal structure.
Researchers have discovered dense, large-scale structures beneath a lost ocean on Mars, using gravity data from multiple missions. The findings suggest active processes in the martian mantle may be boosting the largest volcano, Olympus Mons.
A study by ETH Zurich scientists found that global warming's effects on plant recovery can last for thousands to millions of years. The research team discovered that the severity of climate shifts and the speed at which carbon is sequestered affect the duration of climate warming.
Researchers at Heidelberg University found that millimeter-sized sapphire grains formed in association with volcanism in the Eifel region. The crystals inherited isotopic signatures from mantle melts and were deposited in rivers through weathering, supporting a new theory on their formation.
A new study published by Texas A&M University researchers found that the Hunga Tonga volcano eruption did not contribute to global warming as initially thought. Instead, the eruption resulted in more energy leaving the climate system than entering it, leading to a slight cooling effect.
A recent study published in Terra Nova suggests that Iceland's Reykanes Peninsula will experience recurring, moderately sized volcanic eruptions due to interconnected magma plumbing system. The eruptions pose significant risks to local populations and critical infrastructure.
Researchers predict that Iceland's volcanic eruptions on the Reykjanes Peninsula may last years to decades, posing significant economic disruption and uncertainty for evacuated communities. The eruptions have already forced a state of emergency and evacuated residents and visitors of popular tourist attractions like the Blue Lagoon.
Researchers from the Mann Research Group found strong path dependence in Plio-Pleistocene glaciations, driven by a gradual decrease in regolith and volcanic outgassing. The study suggests that carbon dioxide levels determine the onset of the Mid-Pleistocene Transition, and that it's not too late to act to prevent ice sheet collapse.
Researchers captured a volcanic event on Io using the Large Binocular Telescope's SHARK-VIS instrument, achieving higher resolution than ever before with Earth-based observations. The images reveal surface details equivalent to taking a picture of a dime-sized object from 100 miles away.
Researchers describe a new type of volcanic eruption mechanism at Kīlauea volcano, where explosive eruptions are driven by sudden pressure increases and collapse-induced stomp-rocket effect. This discovery provides new insights into the dynamics of past volcanic eruptions and allows for better forecasts and warnings for future eruptions.
Researchers have developed a highly sensitive fiber optic gyroscope to monitor ground rotations caused by earthquakes in the Campi Flegrei area. The sensor, based on the Sagnac effect, can detect small to medium local earthquakes and provide valuable insights into seismic activity.
Researchers at Imperial College London and the University of Bristol studied 60 explosive volcanic eruptions worldwide to understand the frequency, composition, and size of eruptions. They found that magma buoyancy, storage time in shallower chambers, and reservoir size are key factors driving eruptions.
Researchers from Kobe University found that a 7,300-year-old volcanic eruption was the largest of the Holocene era. The team analyzed seismic imaging and sediment samples to determine the event's magnitude and impact on the climate.
Researchers found that historically low volcanic carbon dioxide emissions, combined with weathering of a large pile of volcanic rocks in Canada, led to the prolonged Sturtian glaciation. The team used plate tectonic modeling and computer simulations to investigate the cause and duration of this ice age.
Researchers have identified a CO-rich atmosphere on exoplanets that could support life. The study reveals a 'gap' in atmospheric conditions where CO levels are higher than expected, indicating potential habitability.
Researchers reconstructed temperature and precipitation patterns for 200 BC to 600 AD, finding a link between climate change and three major pandemics. The study used high-resolution regional climate records and glass particle analyses to confirm the causal relationship.
Researchers at the University of São Paulo found evidence of a tropical island with rich mineral deposits, including cobalt and nickel, in the South Atlantic Ocean. The team's analysis of seafloor sediment samples suggests the area was once home to vegetation and had volcanic activity between 30-40 million years ago.
GEOMAR researchers used 3D seismics to recreate the 1650 Kolumbo volcano eruption, finding that a landslide followed by an explosion created the devastating tsunami. The study provides valuable insights for monitoring submarine volcanic activity and potentially developing early warning systems.
Researchers have created high-resolution underground images of the Long Valley Caldera, revealing a 'hardened lid' of crystallized rock covering the magma chamber. The findings suggest that the area is not gearing up for another supervolcanic eruption but may experience earthquakes and small eruptions due to cooling and gas release.
Researchers have identified three key ingredients needed to bring valuable pink diamonds to the surface: deep carbon, continental collision, and stretching of landmasses. This discovery could lead to finding new pink diamond deposits globally.
Researchers discovered that tectonic plate breakup is the main driving force behind diamond-rich magmas and eruptions from deep inside the Earth. The team's findings could shape the future of diamond exploration, informing where diamonds are most likely to be found.
Geoscientists at Cornell University have discovered that gaseous carbon dioxide can trigger explosive eruptions in basaltic volcanoes. The research uses a new model to suggest that magma comes directly from the mantle, stored tens of kilometers below Earth's surface.
The James Webb Space Telescope has detected hydrogen peroxide on Ganymede's poles and sulfur monoxide on Io, revealing new secrets about Jupiter's Galilean satellites. These findings suggest that charged particles from Jupiter's magnetosphere can alter the surface chemistry of icy moons.
A Southwest Research Institute-led team modeled the early impact history of Venus to explain how it maintains a youthful surface despite lacking plate tectonics. The findings suggest that higher-speed, higher-energy impacts created a superheated core that promoted extended volcanism and resurfaced the planet.
University of Queensland researchers have developed a new technique using laser ablation inductively coupled plasma quadruple mass spectrometry to analyze the chemical composition of magma. This high-resolution method provides clearer data on the eruption style and lava flow, enabling better forecasting of volcanic eruptions.
The Great Sitkin Volcano in Alaska has two magma chambers that drive its long-lived and explosive eruptions. Scientists have discovered a six-stage eruption cycle, with the interaction between the chambers contributing to lava effusion. This study helps predict volcanic eruptions and assess hazards.
Researchers discovered similar volcanic activity in the Singhbhum Craton of India, which shares a geologic history with parts of South Africa and Australia. The study reveals sub-marine volcanic eruptions and sedimentary rocks formed approximately 3.5 billion years ago, providing insights into early Earth processes.
Researchers reconstructed the seafloor morphology around Santorini to better understand volcanic tsunamis. The study revealed undulating bedforms formed by pyroclastic flows and instabilities of the volcanic flanks, indicating that slope instabilities can contribute to tsunami generation.