• The rare but spectacular eruptions of supervolcanoes can cause massive destruction and affect climate patterns on a global scale for decades - and a new study has found that these sites also may experience ongoing, albeit smaller eruptions for tens of thousands of years after. (phys.org)
  • The findings also illustrate that large volcanic systems such as Aira caldera can respond to smaller eruptions at nearby volcanoes if fed from a common deep reservoir but not all the time, since magma pathways open and close periodically. (eurekalert.org)
  • Researchers at the University of Calgary in Alberta, Canada have discovered evidence suggesting that massive volcanic eruptions at the time burnt significant levels of coal, producing suffocating clouds of ash and dust that greatly impacted the world, and may explain the massive devastation that occurred with the Permian Extinction. (redorbit.com)
  • Our research is the first to show direct evidence that massive volcanic eruptions -- the largest the world has ever witnessed --caused massive coal combustion, thus supporting models for significant generation of greenhouse gases at this time," said Grasby. (redorbit.com)
  • Previous studies have suggested massive volcanic eruptions through coal beds in Siberia would generate significant greenhouse gases causing massive global warming. (redorbit.com)
  • Supervolcano" is not a geological term, but has become non-technical shorthand for the kind of massive volcanic eruption that leaves behind a giant bowl-shaped crater, or caldera, such as the one that now holds Oregon's Crater Lake, says David Tucker, a volcanologist at Western Washington University. (geotimes.org)
  • They change to more local and regional hazards from eruptions, earthquakes, landslides and tsunamis that may continue regularly for several tens of thousands of years. (phys.org)
  • The subterranean volcanic plume, 300 miles wide at its top end, may explain why ground along the Teton fault moves in directions just the opposite of those expected, a perplexing discovery that complicates efforts to predict when the fault might generate disastrous 7.5 earthquakes near the ski resorts of Jackson Hole. (innovations-report.com)
  • The last time it blew was in 1538, after earthquakes and uplifting of the ground allowed the molten rock known as magma to accumulate beneath the area. (ibtimes.com)
  • These short-period earthquakes signify the growth of a magma body near the surface and are known as 'A' waves. (wikipedia.org)
  • Within the Japanese bureaucracy, the teams charged with creating disaster prevention and response plans for potential earthquakes, work separately to those dealing with volcanic eruptions. (wordpress.com)
  • Many of the world's volcanoes are monitored for changes such as increases in seismicity or ground deformation. (ruhr-uni-bochum.de)
  • Together, the two chambers make up the world's biggest known magma reservoir, the New Scientist reports. (foxnews.com)
  • Volcanic eruptions in high-latitudes can greatly alter climate and distant river flows, including the Nile, according to a recent study funded in part by NASA. (nasa.gov)
  • It is only several miles away from Mount Vesuvius, the volcano that famously erupted almost 2,000 years ago and destroyed the ancient Roman city Pompeii, covering it in ash and sending out rapid flows of hot gas and material that burned or choked the people in the city. (ibtimes.com)
  • Mount Baker produces andesitic lava flows, pumice, and lahars (volcanic mudflows). (wa.gov)
  • The volcano frequently and explosively produces dacitic lava flows, tephra, and far-reaching lahars (volcanic mudflows). (wa.gov)
  • In a new study published today in the Nature-affiliated journal Scientific Reports, researchers at Louisiana State University (LSU) document geochemical changes over time in the lava flows of Elysium, a major martian volcanic province. (beforeitsnews.com)
  • They found that the unusual chemistry of lava flows around Elysium is consistent with primary magmatic processes, such as a heterogeneous mantle beneath Mars' surface or the weight of the overlying volcanic mountain causing different layers of the mantle to melt at different temperatures as they rise to the surface over time. (beforeitsnews.com)
  • Or is it because these lava flows arose from different parts of Mars' mantle than other volcanic eruptions on Mars? (beforeitsnews.com)
  • R: The highest volcanic waterfall in the world flows down into the valley where I believe One Cloud lived and meditated. (healingtaousa.com)
  • Their prediction used research that had been done by Bernard Chouet, a Swiss volcanologist who was working at the United States Geological Survey and who first observed a relation between long-period events and an imminent eruption. (wikipedia.org)
  • A book published in 1983 wrongfully warning of an imminent eruption was blamed for driving tourists away and causing a $3 million loss in revenues for a prefecture bordering the volcano. (wordpress.com)
  • These findings do not change the current volcanic hazard at Yellowstone,' University of Utah seismologist Jamie Farrell tells Reuters, though he says the findings will help researchers learn more about 'how magma moves from the mantle to the surface. (foxnews.com)
  • The occurrence of shallow magma pockets likely plays a major role in controlling eruptive styles during eruptions and should therefore be routinely considered in hazard mitigation efforts. (eurekalert.org)
  • The structures and fluid-induced dynamics we describe are a template for future unrests at this and other calderas, where they may improve assessment of volcanic hazard. (ibtimes.com)
  • While Glacier Peak has shown no sign of eruption in the last few decades, the lahars deposits in the river valleys from past eruptions are a reminder of the hazard Glacier Peak poses to the communities living in the valleys adjacent to the volcano. (wa.gov)
  • The Fluids Research Group of the Geosciences Department at Virginia Tech verified Linkam's microscope heating stage for analyzing melt inclusions found in magma chambers beneath a volcano, an important component for understanding the magnitude of volcanic eruptions. (prweb.com)
  • Whilst more than a year has passed since the 9.0 magnitude undersea earthquake and the subsequent tsunami and nuclear meltdown which it triggered on March 11, 2011 , the government is still in the process of constructing a disaster response plan, despite strong evidence to suggest that last year's disasters have increased the likelihood of the volcano, which last erupted in 1707, coming back to life with a terrifying bang. (wordpress.com)
  • Numerous examples of volcanoes erupting following a 9.0 magnitude earthquake have been recorded, including Chile , Sumatra and Kamchatka . (wordpress.com)
  • A 17-year University of Utah study of ground movements shows that the power of the huge volcanic hotspot beneath Yellowstone National Park is much greater than previously thought during times when the giant volcano is slumbering. (innovations-report.com)
  • Molten rock and hot water generated by the hotspot continue to make the 45-by-30-mile Yellowstone caldera - a giant crater - huff upward and puff downward without producing eruptions. (innovations-report.com)
  • Steam and gas still issue from both Sherman Crater and the Dorr fumarole field on the northeast flank of the volcano today. (wa.gov)
  • The team's discovery of a massive crater, resulting from an ancient eruption in northern Washington, brings to six the number of powerful "supervolcano" eruptions known to have occurred in the Cascades throughout its history, and hints at the volcanic chain's potential power, they suggest. (geotimes.org)
  • One, a Tertiary-aged caldera at Hannegan Peak in northern Washington, was first mapped by Tucker in a 2004 paper, but because the crater is well-exposed, he says, the site offered a "great opportunity" to study a volcanic arc caldera close-up and in cross-section. (geotimes.org)
  • Returning to the site, Tucker, Hildreth and their team found that the eruption and subsequent collapse of the crater appeared to have occurred in two phases rather than one, they reported in the March/April issue of the Geological Society of America Bulletin . (geotimes.org)
  • The hazards from a supervolcano don't stop after the initial eruption," de Silva said. (phys.org)
  • Many hazards come with living near volcanoes. (wa.gov)
  • Click below to learn more about volcanoes, their hazards, who is at risk, and how to prepare for an emergency. (wa.gov)
  • New research suggests this liquid magma is very rare. (kuow.org)
  • In addition to the unusual collapse mechanism, the caldera itself suggests that "there's the potential for some really huge eruptions in the Cascades," Tucker says. (geotimes.org)
  • Most eruptions involve tephra, but many were accompanied by far-reaching lahars and dome-building. (wa.gov)
  • The results further suggest that between eruptions magma batches migrate to shallower depths where they evolve and increase their explosive potential. (eurekalert.org)
  • This process also stops at the eruption, so the shallower the slope of titanium concentrations across these boundaries today, the longer the crystal spent in magmatic conditions. (innovations-report.com)
  • Volcanic dome atop the Novarupta vent, Valley of Ten Thousand Smokes, Katmai National Park and Preserve, Alaska. (nasa.gov)
  • The observations from the two volcanos--Aira caldera and Kirishima--show that the two were connected through a common subterranean magma source in the months leading up to the 2011 eruption of Kirishima. (eurekalert.org)
  • Tamino has posted two examinations of the "volcanoes emit more CO2 than humans" argument by looking at the impact of the 1991 Pinutabo eruption on CO2 levels and the impact of past super volcanoes on the CO2 record . (skepticalscience.com)
  • Much of the volcanic deposits have been either eroded or buried by rivers, glaciers, and human development. (wa.gov)
  • Washington's Hannegan Peak, in the northern Cascades volcanic range, contains ash flow deposits, volcanic glass and cemented rock fragments, evidence of a massive eruption 3.7 million years ago. (geotimes.org)
  • The research team from the University of Miami's (UM) Rosenstiel School of Marine and Atmospheric Science and Florida International University analyzed deformation data from 32 permanent GPS stations in the region to identify the existence of a common magma reservoir that connected the two volcanoes. (eurekalert.org)
  • Carmelo Ferlito, a volcanologist at Università di Catania, in Sicily, has suggested in a paper published in the journal Earth-Science Reviews that Mt. Etna behaves more like a giant hot spring than a volcano. (phys.org)
  • That is a valid conclusion, says Cynthia Gardner, a volcanologist at the Cascades Volcano Observatory. (geotimes.org)
  • Researchers had traditionally used the Vernadsky stage for high temperature studies of melt inclusions. (prweb.com)
  • Heat from the volcano can melt snow or ice and cause dangerous mudslides called lahars. (wa.gov)
  • There are additional reports of eruptions and lahars from the 19th century, and as recently as 1975, fumarole activity and snow melt ramped up dramatically for several years. (wa.gov)
  • These results are described in the article "Melt inclusion shapes: Timekeepers of short-lived giant magma bodies" appearing in the November issue of the journal Geology . (innovations-report.com)
  • Using advanced 3-D X-ray tomography, the researchers were able to measure the size and shape of the melt inclusions with exquisite precision. (innovations-report.com)
  • The physics of this process is also well known, so the researchers could use these measurements to provide an independent estimate of how long a crystal spent floating around in the melt. (innovations-report.com)
  • In fact, Oregon State University researchers were able to link recent eruptions at Mt. Sinabung in northern Sumatra to the last eruption on Earth of a supervolcano 74,000 years ago at the Toba Caldera some 25 miles away. (phys.org)
  • In this way, the researchers confirmed what has long been anticipated: a clear evidence of the correlation between crystal growth (fresh magma input) and volcanic seismicity. (ruhr-uni-bochum.de)
  • Evidence from a Martian volcanic rock indicates that Mars magmas contained significant amounts of water before eruption on the planet's surface, researchers from the Massachusetts Institute of Technology, the University of Tennessee and other institutions report in the Jan. 25 issue of Nature. (sciforums.com)
  • Without any concrete evidence confirming Mount Fuji's imminent volcanic eruption, these teams remain divided as to whose responsibility this case is. (wordpress.com)
  • New Mars research shows evidence of a complex mantle beneath the Elysium volcanic province. (beforeitsnews.com)
  • The discovery of the connection does not suggest that the Toba Caldera is in danger of erupting on a catastrophic scale any time soon, the researchers emphasized. (phys.org)
  • During the last 30 years the behavior of the volcano has changed, with everything becoming hotter due to fluids permeating the entire caldera," De Siena said. (ibtimes.com)
  • Southern Japan on Feb. 3rd, 2011, showing the active cones of Kirishima (Shinmoedake) and Aira caldera (Sakurajima) volcanoes. (eurekalert.org)
  • The Japanese cities of Kirishima and Kagoshima lie directly on the border of the Aira caldera, one of the most active, hazardous, and closely monitored volcanoes in southern Japan. (eurekalert.org)
  • Leading up to the eruption of Kirishima, which is located in the densely-populated Kagoshima region, the Aira caldera stopped inflating, which experts took as a sign that the volcano was at rest. (eurekalert.org)
  • The eruption was powerful enough to form a caldera at the mountain's summit - a rarity in the Cascades. (geotimes.org)
  • Caldera-forming eruptions are many times more powerful than Mount St. Helens' most recent eruption, and worldwide, there have been few such events in human history, Tucker says. (geotimes.org)
  • Although they are rare, she says, "clearly the Cascades are capable of producing caldera-forming eruptions. (geotimes.org)
  • Volcanic seismicity has three major forms: short-period earthquake, long-period earthquake, and harmonic tremor. (wikipedia.org)
  • Magma compositions may evolve after formation by fractional crystallization, contamination, and magma mixing. (phys.org)
  • Sulfur dioxide is one of the main components of volcanic gases, and increasing amounts of it herald the arrival of increasing amounts of magma near the surface. (wikipedia.org)
  • Using a sophisticated computer model developed by NASA's Goddard Institute for Space Studies, New York, the researchers linked the Laki eruptions to a cascade of effects that rippled across much of the Northern Hemisphere, altering surface temperatures that ultimately resulted in much below normal rainfall over the Sahel of Africa and record low water levels on the Nile River for up to a year. (nasa.gov)
  • These volcanoes are part of the Cascade Range, a 1,200-mile line of volcanoes from British Columbia to northern California. (wa.gov)
  • Sitting relatively low on the sklyline, Glacier Peak is mostly hidden from Puget Lowland residents, yet it is one of the more dangerous of the Cascade volcanoes. (wa.gov)