Articles tagged with Volcanology
Researchers from the University of Cambridge's CSER highlight the need for improved surveillance and public education to mitigate the impact of volcanic eruptions. The risk of a magnitude seven explosion in the next 100 years is one-in-six, with potential consequences including abrupt climate change and collapse of civilizations.
A novel three-dimensional model of the fluid stored deep in Earth's crust along the Cascadia Subduction Zone provides new insight into how the accumulation and release of those fluids may influence seismic activity. The study's findings have applications for increasing understanding of seismic activity along the Cascadia Subduction Zone.
Scientists studied oxygen isotopes in lava samples from the Fagradalsfjall eruption to understand magma sources and mantle dynamics. The research revealed diverse mantle components with uniform oxygen isotope ratios, shedding light on Iceland's geology and refining mantle models.
Researchers at Mainz University found the Cumbre Vieja lava to be exceptionally low in viscosity, resulting in rapid flow and devastating damage. The study published in Nature Communications revealed that the lava's composition, particularly its silica content, contributed to its fluidity.
Researchers from the University of Oregon studied a persistent lava lake at Kīlauea's summit, finding that seismic signals encode resonance of magma sloshing in and out of the shallow magma chamber. The study provides new insights into volcanic gas migration and magma temperature, shedding light on the volcano's dynamics.
A massive volcanic eruption at the end of the Triassic period caused a global cooling effect, leading to the mass extinction. The event paved the way for the rise of dinosaurs as their natural predators went extinct.
Researchers estimate 60,000-year timeline of massive volcanic eruptions, finding 85 large global eruptions and 69 larger than the 1815 Mount Tambora eruption. This new data helps improve climate models by providing insights into Earth's climate sensitivity.
A new study led by Smithsonian volcanologist Dan Rasmussen finds that water content in magma is a significant factor controlling its storage depth. The research provides crucial insights into the physics of magma storage beneath volcanoes, which can aid in predicting volcanic eruptions.
A study in the journal Geology explores the formation of rifts as tectonic plates pull apart, finding that slow plate movement is the primary driver. The research focuses on a newly formed rift in Iceland, where magma did not play a key role in its creation.
Researchers at ETH Zurich analyzed garnet crystals from volcanic deposits to infer magma chamber residence times. They found that phonolitic magma stored in the upper crust for several thousand years before triggering an eruption, and a reservoir of this magma has existed beneath Vesuvius for the last 10'000 years.
Researchers found a repeated link between volcanic eruptions and dynastic collapse in China's Imperial Era, with 62 of 68 collapses preceded by at least one eruption. The study highlights the need to prepare for future eruptions and emphasizes the importance of building resilient societies.
A new study presents a broad survey of monogenetic volcanoes in the US Southwest, providing insights into their characteristics and potential hazards. The research reveals that over 1,800 volcanoes have erupted in the region over the past 2.58 million years, with some still posing threats despite being dormant.
Researchers found that climate change will amplify the temporary cooling caused by large eruptions and reduce its effect on small- and medium-sized eruptions. The study used global climate models to simulate how volcanic aerosols might be affected by warming scenarios.
A new study published in GSA Today suggests that the Yellowstone hotspot is derived from a deep mantle plume, with magmatism extending to at least 56 million years ago. The study's findings indicate a long-lived and robust hotspot that has migrated across northeastern California, northern Nevada, and into Yellowstone National Park.
Nonavian dinosaurs went extinct during the end-Cretaceous mass extinction due to a 10-15% reduction in sunlight caused by an asteroid impact. Simulations suggest that the asteroid impact was the main driver of nonavian dinosaur extinction, while volcanism might have mitigated its effects.
A new study published in Lithosphere found that Permian volcanism contributed to increased atmospheric greenhouse gas content in Antarctica. The researchers analyzed age and isotopic data from zircon minerals, expanding the known distribution of Choiyoi-related deposits and highlighting the importance of subduction-related volcanism.
New research suggests that Chicxulub's impact was not the sole cause of the end-Cretaceous mass extinction. Volcanism, climate changes, and other factors also played significant roles in four out of five major mass extinctions in Earth history.
Journalists Alexandra Witze and Jane Qiu win €2,500 Geosciences Communications Fellowship for book and climate change projects respectively. The EGU General Assembly invites all winners to attend in Vienna from April 22-27, 2012.
A new themed issue of Geosphere delves into the geology and tectonic history of northern San Francisco Bay region, featuring studies on sedimentary and volcanic deposits cut by active strike-slip faults. The papers provide insights into groundwater hydrology, seismic hazard, and plate margin evolution.
Researchers have found a connection between seismic slip and nonvolcanic tremor in the Cascadia subduction zone, potentially increasing stress on the megathrust fault. The findings suggest that slow slip events may lead to increased risk of megathrust earthquakes.
A hot spot on Enceladus's south pole generates enough heat to eject ice and vapor plumes, indicating geological activity. The presence of water vapor and lack of sodium suggest a different mechanism may be at play, fueling questions about the moon's habitability.
The Geological Society of America will hold its 112th annual meeting in Reno, Nevada, from November 13-18. The event features eight Pardee Keynote Symposia and a record number of technical sessions covering topics such as active tectonics, oceanic island volcanism, and environmental geoscience.