Articles tagged with Volcanoes
A recent study by Professor Joseph Michalski and his team has revealed a vast number of diverse volcanoes in Mars' ancient crust, including lava domes, stratovolcanoes, calderas, and large shields of ash. These findings suggest that intense volcanism occurred on ancient Mars, causing the crust to collapse into the mantle.
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.
New research reveals signs before a volcano erupts after tens of thousands of years of dormancy, including changes in magma composition and crystal formation. The study found that water-rich recharge magmas played a key role in triggering explosive eruptions, with amphibole being a critical indicator.
Researchers uncover 10 new trilobite species in Thai sanctuary, shedding light on Cambrian-Ordovician period and connecting Thailand to parts of Australia. The discovery helps date the age of fossils and better understand global geography.
The study found that the eruption changed the chemistry and dynamics of the stratosphere, leading to unprecedented losses in the ozone layer. The injection of water vapor and sulfur dioxide increased sulfate aerosols, which drove changes in temperature and circulation, resulting in decreased ozone levels in the Southern Hemisphere.
Research from Harvard John A. Paulson School of Engineering and Applied Sciences estimates that humans have increased atmospheric mercury levels sevenfold, with a pre-anthropogenic baseline of around 580 megagrams. Human emissions from coal-fired power plants and waste-incineration are responsible for the majority of this increase.
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 found 13 mummified leaf-eared mouse cadavers atop 4-mile-high volcanoes, with DNA analysis revealing a distinct population from lower-altitude mice. The discovery suggests the rodents ascended without human assistance and have adapted to extreme conditions.
Researchers at Cornell University have characterized volcanic ash samples from 40 explosive eruptions to provide a comprehensive dataset. The study found that the composition of volcanic ash varies significantly with grain size, tectonic setting, and chemistry, particularly in finer particles where salts increase and glass and iron oxi...
A new modeling method powered by interconnected processors removed human bias from the debate over dinosaurs' demise. The study suggests that the outpouring of climate-altering gases from the Deccan Traps alone could have been sufficient to trigger global extinction, consistent with volcanic eruptions contributing to the mass extinction.
A UNIGE team has developed a method to rapidly obtain valuable information about the structure of volcanoes. By analyzing three key parameters: height, rock thickness, and chemical composition of magma, scientists can identify the active volcanoes most likely to produce large-scale eruptions.
A new study reveals that the Pacific Walker Circulation has changed its behavior over the industrial era, with volcanic eruptions causing temporary weakening of the circulation. This could lead to more frequent multi-year La Niña or El Niño events, exacerbating climate-related risks.
A new study reveals that volcanic eruptions can temporarily weaken the Pacific Walker Circulation, a major driver of global precipitation. The recent strengthening of this circulation suggests that aerosols from human activity may have an opposite effect on its behavior.
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.
Research reveals Kama'ehu volcano in Hawaii has erupted five times in the past 150 years. The new study uses mass spectrometry to measure radium-226 in lava samples, revealing a frequency of eruptions around 30 years. This slower rate is linked to sluggish mantle upwelling on the margin of the Hawaiian plume.
The giant Olympus Mons volcano on Mars has morphological similarities with many active volcanic islands on Earth, indicating contact between liquid water and lava. A vast ocean of liquid water once occupied the Red Planet's northern lowlands, according to recent work published in Earth and Planetary Science Letters.
Researchers at Durham University argue that a new radiocarbon-based date for the Laacher See volcano eruption is incorrect due to contaminated trees absorbing dead volcanic carbon. The team suggests an alternative date of 12,880 years ago, coinciding with a newly reported sulphur spike in the Greenland ice sheet.
A large granite deposit discovered below the lunar surface suggests ancient volcanic activity, likely feeding a volcano that erupted 3.5 billion years ago. The finding helps explain how the early lunar crust formed.
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.
Scientists have found that a notable amount of subducted carbon is returned to the atmosphere through volcanic degassing in the Aleutian-Alaska Arc. This recycling process improves our understanding of Earth's climate and can help inform global climate models.
Climate change is expected to increase the likelihood and frequency of volcanic eruptions, making planning and responding to crises more challenging. Volcanologists are warning that governments may need new strategies to predict and mitigate the effects of future eruptions.
Researchers found that volcanic eruptions' impact on climate is being underestimated by a factor of two to four in standard climate projections. Small-magnitude eruptions are responsible for as much as half of all sulphur gases emitted, with a significant collective effect.
Researchers have found evidence of 20 million years of 'hot spot' magmatism under the Cocos plate, with a long-lived melt channel that originated from a mantle plume. The study suggests that this channel is regionally extensive and may be a widespread source for intraplate magmatism.
The January 15, 2022, eruption of Hunga Volcano in Tonga created a 'supercharged' thunderstorm that produced nearly 200,000 lightning flashes. Scientists analyzed high-resolution lightning data to gain insights into the eruption's timeline and behavior.
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 at UCL and INGV found that parts of the Campi Flegrei volcano have been stretched nearly to breaking point, indicating a higher risk of rupture. The study used a model of volcano fracturing to interpret patterns of earthquakes and ground uplift, suggesting that an eventual eruption could be preceded by weaker signals.
Scientists discover hydrothermal deposits at a 5.7 km depth in the Japan Trench, indicating low-temperature hydrothermal activity and elevated CO2 and methane levels. The findings highlight the need for further studies on petit-spot volcanoes and their potential impact on global biogeochemical cycles.
New research from Rice University suggests that ancient microorganisms helped cause massive volcanic events by facilitating the precipitation of minerals in banded iron formations. The study provides insight into processes that could produce habitable exoplanets and reframes scientists' understanding of Earth's early history.
An international team found that volcanic eruptions can produce equatorial plasma bubbles in the ionosphere, disrupting satellite-based communications. The Tonga eruption triggered an irregular structure of electron density across the equator, delaying radio waves and degrading GPS performance.
Astronomers have discovered an Earth-sized planet, LP 791-18d, with active volcanoes that could sustain an atmosphere, potentially allowing for liquid water and life. The planet's unique tidal locking creates a permanent day and night side, with the night side possibly experiencing condensation of water vapor.
Astronomers have discovered an Earth-sized exoplanet, LP 791-18 d, which orbits a small red dwarf star in the constellation Crater. The planet may experience volcanic flare-ups as frequently as Jupiter's moon Io, potentially making it habitable for life. However, more research is needed to confirm its atmosphere, water content, and hab...
A team of scientists led by NYU Abu Dhabi researcher Mohamad Ali-Dib discovered an Earth-sized exoplanet named LP 791-18 d. The planet may be carpeted with volcanoes and sustain water in liquid form, making it potentially habitable.
Astronomers have discovered a new temperate exoplanet, LP 791-18 d, with properties similar to those of Earth. The planet is believed to be covered in volcanoes due to tidal heating, which causes heat to build up in its interior.
A study from Smithsonian researchers deepens understanding of Earth's crust by testing and eliminating the garnet hypothesis about why continental crust is lower in iron and more oxidized. The findings suggest that intense heat and pressure cannot produce the necessary conditions for garnet formation, contradicting a popular explanation.
A study by GEOMAR has accurately determined the volume of magma from the Minoan eruption, providing a benchmark for measuring other eruptions. The analysis combines geophysical and geological methods to estimate magma volumes and deposition sizes.
A new camera design allows for cheaper and more efficient long-term volcano monitoring, enabling researchers to track gas emissions and predict eruptions. The camera's affordability and user-friendliness make it accessible to more volcanologists, facilitating new research opportunities.
Researchers used zircon crystals to unlock information about early Earth's magmas and plate tectonic activity, suggesting that the process was occurring more than 4.2 billion years ago. This finding could be beneficial in the search for life on other planets.
Researchers Paul Byrne and Rebecca Hahn have compiled a global catalog of 85,000 volcanoes on Venus, providing the most comprehensive understanding of the planet's volcanic properties. The dataset includes detailed analyses of volcano distribution, size, and clustering, which will aid in locating future active lava flows.
Researchers discovered that as magma production decreased, volcanoes became increasingly complex, with internal magma pockets and reservoirs forming. The study provides insights into volcanic eruption processes and can inform our understanding of active continental hotspot volcanoes globally.
The study estimates that up to 40% of current carbon dioxide emissions come from the dissolution of calcite in rocks, while 60-80% originates from underground magma. Researchers aim to provide a tool for better discriminating between magmatic and non-magmatic CO2 sources.
Researchers document diverse assemblage of fish species living on asphalt volcanoes in the Santa Barbara Channel, characterized by low densities and high diversity rates. The team's findings highlight the unique nature of these habitats and emphasize the need for conservation efforts to protect them.
Scientists at Cornell University have discovered a way to precisely locate magma storage in volcanoes, offering improved risk assessment for eruptions. By analyzing carbon dioxide-rich fluids trapped within cooled crystals, they can determine the depth of magma storage and scorching reservoirs with unprecedented accuracy.
A new study published in Geophysical Research Letters reveals that even dormant volcanoes release a surprisingly high amount of sulfur into the Arctic atmosphere. This finding has significant implications for understanding Earth's atmosphere and its relationship with climate and air quality.
A new analysis of seismic data recorded after the Tonga eruption has revealed two distinct sequences of events, including quasi-periodic explosions and a massive final event. The study used back-projection techniques to tease out details from teleseismic P waves, shedding light on the volcano's internal dynamics.
David Kohlstedt's lab recreated the mantle's conditions, observing microscopic changes and scaling up results to real-world size. This work underlies modern geophysics and has improved our understanding of earthquakes, volcanoes, and the planet's surface.
A new study by Portland State University researchers found that deep-sea microorganisms thrive in high-temperature environments and exhibit a staggering level of diversity, with over 500 new genera discovered. The microbes also rely on each other for survival through metabolic handoffs, revealing a complex interdependence.
Researchers uncover ancient manufacturing strategy that incorporates self-healing functionalities into Roman concrete. Hot mixing process allows for faster construction and enhanced durability through spontaneous cracking and recrystallization.
Scientists at Caltech used machine-learning algorithm to chart sills, mapping them with precision and linking them to active volcanoes Mauna Loa and Kīlauea. The study provides new insights into magma storage and transport deep beneath Hawai‘i.
A team led by Professor Thorsten Hoffmann uses small, portable observation drones equipped with miniaturized sensors to analyze volcanic gases and predict eruptions. The ratio of carbon dioxide levels to sulfur dioxide can reveal the likelihood of an impending eruption.
A recent VLA and ALMA study investigated Jupiter's atmosphere and Io's volcanic activity, shedding light on the giant planet's complex dynamics. The research revealed the vertical structure of Jupiter's atmosphere and found high-temperature compounds, including NaCl and KCl, in Io's atmosphere, suggesting differences in subsurface magm...
A quarter-mile segment of the Klamath Geo Trail was successfully resurfaced using volcanic ash from Mount Mazama, demonstrating its potential as a more sustainable and locally sourced pozzolan. The surface treatment improved firmness and stability, making it accessible to people with mobility devices.
A team at the University of Tokyo has discovered that analyzing the ratio of argon-40 to helium-3 in magma gases can indicate the risk of different types of eruption. By monitoring these gas ratios, scientists hope to develop a portable equipment for real-time, on-site measurements, enabling early warning systems and potentially saving...
Using 1980s environmental inventories, researchers found that disaster risk assessment could have predicted the damage from the Great East Japan Earthquake. The study compared composite risk maps from the 1980s with post-2011 hazard maps to show a significant increase in high-risk areas.
The Subduction Zones in Four Dimensions (SZ4D) initiative aims to improve understanding of subduction zone hazards through a collaborative effort. The plan involves deploying new instrumentation and developing more accurate models to predict large earthquakes, volcanic eruptions, and landslides.
Researchers used the parallax effect to measure the height of the volcano's plume, reaching an altitude of 57 km, surpassing previous records. The study provides new insights into volcanic eruptions and their impact on the climate.
A study reveals a consistent pairing of volcanic ash and low ocean oxygen events during times of rapid climate warming at the end of the last ice age. The research suggests that volcanic eruptions may increase as the planet warms, posing risks to populated regions.
Magma is rising to about 6 miles from a depth of 12 miles, causing earthquakes and surface deformation. The new approach could lead to earlier detection of volcanic unrest in Alaska.
Researchers find that airborne chemical methyl bromide is a compelling indicator of biological activity on other planets. Its detectability increases around M dwarf stars, making it an attractive target for future missions to search for extraterrestrial life.
A recent study published in Geophysical Research Letters reveals that the Tonga volcano eruption stimulated a rapid and massive bloom of ocean phytoplankton, covering an area nearly 40 times the size of Oahu within just 48 hours. The bloom was triggered by the deposition of volcanic ash, which supplied nutrients for phytoplankton growth.
New research proposes that intense Andean volcanism around seven million years ago may have contributed to the Late Miocene Cooling Event, leading to the extinctions of ancient marine mammals. The study suggests that ash from ongoing volcanism could have poisoned the air or led to toxic algae blooms.