All articles tagged with #supervolcano
A recent feature examines the potential consequences of a major eruption at the Yellowstone supervolcano in the United States, highlighting the geological risks and hypothetical scenarios associated with such an event.
A new study by UK researchers details a hypothetical timeline for a Yellowstone supereruption, estimating it could cause 0.7 to 1.3 billion premature deaths through ashfall, infrastructure collapse, and global cooling, though current monitoring shows no signs of imminent activity.
British Geological Survey researchers report the remains of a vast supervolcano beneath England’s east coast, centered under The Wash and extending into Norfolk and Lincolnshire, at least 65 km wide, which erupted about 454 million years ago and expelled hundreds of cubic kilometers of material, with ash spread across northern Europe; the find reshapes understanding of England’s deep geological past and poses no current eruption risk.
A new three-dimensional geodynamic model of western North America shows Yellowstone is fed by shallow asthenospheric mantle transported eastward by a long-lived 'mantle wind' rather than a deep mantle plume. This flow creates decompression melting and distributes magma as a thick mush across the lithosphere, forming a southwest-dipping channel that acts as a conduit for magma over long timescales. The findings align with geophysical observations and offer a unified explanation for how large magmatic systems beneath supervolcanoes can persist without persistent liquid magma chambers.
A Kobe University-led study using underwater seismic surveys mapped a large magma reservoir beneath Japan’s Kikai Caldera and found that fresh magma is being injected to refill the system after its 7,300-year-old eruption, supporting a general refill model for giant calderas like Yellowstone and Toba and potentially improving monitoring of future giant eruptions.
Volcanoes come in various forms, including supervolcanoes that produce enormous eruptions (VEI 8), create surface depressions, and erupt infrequently. Yellowstone is a famous example. The largest volcano on Earth is actually underwater: Tamu Massif in the Pacific, about 310,000 square kilometers in area with roots extending ~30 kilometers into the crust, formed around 145 million years ago and now extinct. Mauna Loa was previously considered the largest on land, while Olympus Mons is often cited for scale in comparisons.
Scientists have discovered a potentially massive $1.5 trillion lithium deposit beneath the dormant McDermitt caldera, which could significantly impact the global supply of critical energy materials. The deposit, formed over 16 million years ago, is of strategic interest for the U.S. amid rising demand for lithium-ion batteries, but environmental, cultural, and technical challenges remain before extraction can proceed.
Scientists have confirmed the world's largest lithium deposit beneath Nevada's McDermitt Caldera, potentially holding over 20 million metric tons of lithium, which could significantly impact the US's clean energy and electric vehicle industries. The deposit's unique volcanic origin presents both opportunities and challenges, with ongoing debates over environmental and cultural impacts.
A massive lithium-rich clay deposit beneath the McDermitt caldera on the Nevada-Oregon border, valued at around $1.5 trillion, could significantly impact the global battery industry due to its size, high lithium concentration, and shallow depth, though environmental and cultural concerns pose challenges for extraction.
Recent advanced imaging studies have uncovered hidden magma reservoirs beneath Yellowstone, particularly in the northeastern caldera, raising concerns about potential increased eruption risks. While no immediate threat exists, a super-eruption could have significant local and global impacts, including ash fallout, climate cooling, and ecological disruptions. Ongoing monitoring and research are crucial for understanding and mitigating future risks.
Recent studies using advanced electromagnetic imaging have revealed multiple magma reservoirs beneath Yellowstone, shifting the focus of eruption risk to the northeast and highlighting the potential for a catastrophic super-eruption that could cause global climate cooling and widespread disruption, although such an event remains unlikely in the near future.
Aso Caldera in Japan is a massive, active supervolcano with a history of catastrophic eruptions, housing 17 volcanoes within its 15-mile-wide caldera, and poses ongoing geological and volcanic risks due to its active magma chamber and fault lines.
The Aso Caldera in Japan is a massive volcanic crater housing 17 volcanoes, including active ones like Nakadake, and is considered one of Earth's nine supervolcanoes, with a history of massive eruptions and located along the Pacific Ring of Fire.
Recent studies show that the unrest at Campi Flegrei is driven more by pressure in a sealed geothermal reservoir and hydrothermal activity than by magma movement, suggesting that managing water and pressure levels could mitigate eruption risks, although the volcano remains dangerous.
A recent USGS study reveals that Yellowstone's magma system is more complex than previously thought, with a 16% chance of a super-eruption before 2100, which could cause widespread ash fall, global cooling, and ecological disruption, emphasizing the need for improved monitoring and preparedness despite the low probability.