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Keyword: volcanoes

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  • Italy’s Stromboli Volcano Erupts with 'High Intensity'

    11/17/2020 9:37:22 AM PST · by BenLurkin · 39 replies
    VOA ^ | November 16, 2020 02:54 PM
    Italy’s National Institute of Geophysics and Volcanology reported a “high intensity” explosion Monday at the Stromboli volcano, one of the most active volcanoes in the world, located off the southern coast of Sicily in the Mediterranean Sea. The institute’s surveillance cameras captured the event in visual and thermal format early Monday. The explosion could be seen sending ash and steam at least 100 meters into the air and streams of lava rapidly running down the center-south side of the volcano. The institute reported the event lasted four minutes. "From the seismological standpoint," it "was characterized by a sequence of explosive...
  • Magma 'conveyor belt' fuelled world's longest erupting supervolcanoes

    11/04/2020 5:14:09 PM PST · by BenLurkin · 12 replies
    phys.org ^ | Curtin University | April Kleer,
    International research led by geologists from Curtin University has found that a volcanic province in the Indian Ocean was the world's most continuously active—erupting for 30 million years—fuelled by a constantly moving conveyor belt of magma. It's believed this magma conveyor belt, created by shifts in the seabed, continuously made space available for the molten rock to flow for millions of years, beginning around 120 million years ago. Research lead Qiang Jiang, a Ph.D. candidate from Curtin's School of Earth and Planetary Sciences, said the studied volcanoes were in the Kerguelen Plateau, located in the Indian Ocean, about 3,000 kilometers...
  • Scientists Reveal More About Volcanic Eruption That Rocked the Ancient Maya

    09/30/2020 10:03:54 AM PDT · by BenLurkin · 28 replies
    Gizmodo ^ | 09/29/2020 | George Dvorsky
    Using a combination of archaeological and geological evidence, scientists have finally pinpointed the date of the infamous Tierra Blanca Joven eruption, which likely devastated Maya communities in what is now El Salvador. Ilopango volcano blew its stack 1,589 years ago—give or take a year or two—according to new research published this week in Proceedings of the National Academy of Sciences. That this volcano erupted well over 1,000 years ago was well established, but the new research finally firms up the date, in a paper that will be of interest to archaeologists, historians, geologists, and climate scientists. The Ilopango caldera is...
  • Researchers Discover Unexpected Magma Systems Lurking Beneath 'Boring' Volcanoes

    08/02/2020 7:35:55 PM PDT · by BenLurkin · 7 replies
    sciencealert ^ | 2 AUGUST 2020 | CARLY CASSELLA
    Analysing microscopic crystals in the basalt and ejected material of two volcanoes in the Galápagos, the researchers discovered hidden systems of magma that are not so simple or predictable after all. Even though the Wolf and Fernandina volcanoes in the Galápagos have seemingly spewed the same basaltic lava for their entire existence, the new findings suggest they are sitting on a chemically diverse system of molten rocks, some of which have the potential to set into motion explosive activity. Just because these volcanoes appear boring on the surface doesn't mean the monotony will continue forever, the researchers say. While the...
  • Likely active volcanoes found on Venus, defying theory of dormant planet

    07/26/2020 6:33:28 PM PDT · by SunkenCiv · 32 replies
    The Guardian ^ | Monday, July 20, 2020 | Agence France-Presse
    Scientists have identified 37 volcanic structures on Venus that appear to have been recently active - and probably still are today - painting the picture of a geologically dynamic planet and not a dormant world as long thought. The research focused on ring-like structures called coronae, caused by an upwelling of hot rock from deep within the planet's interior, and provided compelling evidence of widespread recent tectonic and magma activity on Venus's surface, researchers have said. Many scientists had long thought that Venus, lacking the plate tectonics that gradually reshape Earth's surface, was essentially dormant geologically, having been so for...
  • Young Volcanic Island Nishinoshima Belches Ash and Lava As It Grows in the Pacific

    07/07/2020 7:45:24 PM PDT · by BenLurkin · 19 replies
    SciTechDaily ^ | July 7, 2020 | Michael Carlowicz, NASA Earth Observatory
    A young volcanic island has been growing in the western Pacific Ocean since 2013. Since mid-June 2020, it has been going through a vigorous growth spurt. According to reports and aerial photographs from the Japan Coast Guard, activity at the volcano appeared to pick up in late May, spewing ash and lava with more vigor than in previous months. On July 3, the volcanic plume rose as high as 4700 meters (15,400 feet) above sea level; the next day, ash was detected as high as 8300 meters (27,200 feet), the highest altitude a plume has risen since the volcano poked...
  • 40 years after its famed eruption, Mt. St. Helens looms as a marvel and a threat

    05/18/2020 4:09:27 AM PDT · by C19fan · 18 replies
    LA Times ^ | May 17, 2020 | Richard Read
    On the morning of May 18, 1980, an earthquake shook Mt. St. Helens and the mountain's north face collapsed in one of the largest debris avalanches ever recorded. The slide uncorked the volcano, baring magma that exploded with 500 times the force of the Hiroshima bomb in the most destructive eruption in U.S. history. The cataclysmic chain of events killed 57 people and thousands of animals, took out 250 homes, 47 bridges and 185 miles of highway, clogged rivers with sediment, flooded valleys and blocked the Columbia River shipping channel. Forty years later, the destruction may not be over. The...
  • After the Dinosaur-Killing Impact, Soot Played a Remarkable Role in Extinction

    04/28/2020 6:31:27 AM PDT · by rktman · 62 replies
    smithsonianmag.com ^ | 4/27/2020 | Noah Taylor Redd
    The interstellar object (alternatively a comet or an asteroid) that killed the dinosaurs when it slammed into Earth didn't work alone. Researchers have shown previously that its after-effects, such as tidal waves and earthquakes, played an important role in the mass extinctions of three-fourths of plant and animal life. Now, new research suggests that one of the most important factors was the soot-rich smoke from fires sparked by the collision. Clay Tabor, a geoscientist at the University of Connecticut, and his colleagues studied soot, sulfates and dust to see how each type of particle may have contributed to the cataclysm....
  • Volcano Erupts on Kuchinoerabu Island in Kagoshima Prefecture; no Injuries Reported

    01/14/2020 11:18:56 PM PST · by nickcarraway · 13 replies
    A volcano in southwestern Japan erupted Saturday, the Meteorological Agency said, but there were no immediate reports of injuries. Rocks were thrown about 300 meters from the crater of Mount Shintake on Kuchinoerabu Island in Kagoshima Prefecture following the eruption around 3:05 p.m., the agency said, adding it had not confirmed any pyroclastic flow. No evacuation order was issued. As of the end of last month, 100 people were registered as residents on the island, which is about 36 square kilometers (nearly 14 square miles) in size. It was the first eruption on the island since Feb. 2 last year....
  • Why Are Volcanoes All Over The Globe Suddenly Shooting Giant Clouds Of Ash?

    01/14/2020 8:50:06 AM PST · by Roman_War_Criminal · 128 replies
    PNW ^ | 1/14/2020 | Michael Snyder
    There certainly hasn't been a lack of seismic activity so far in 2020. Just a few days ago, I wrote about the horrific earthquake swarm that Puerto Rico is currently experiencing. More than 1,000 earthquakes have rattled Puerto Rico so far, and as you will see below, it was just hit by another very large earthquake. But right now volcanic eruptions have taken center stage. In particular, a massive eruption in the Philippines is making headlines all over the world, but what most people don't realize is that several other volcanoes have also blown their tops in spectacular fashion within...
  • 'Pompeii-Like' Excavations Tell Us More About Toba Super-Eruption

    03/04/2010 7:13:24 PM PST · by SunkenCiv · 17 replies · 666+ views
    ScienceDaily ^ | March 3, 2010 | University of Oxford
    Newly discovered archaeological sites in southern and northern India have revealed how people lived before and after the colossal Toba volcanic eruption 74,000 years ago... The seven-year project examines the environment that humans lived in, their stone tools, as well as the plants and animal bones of the time. The team has concluded that many forms of life survived the super-eruption, contrary to other research which has suggested significant animal extinctions and genetic bottlenecks. According to the team, a potentially ground-breaking implication of the new work is that the species responsible for making the stone tools in India was Homo...
  • No Volcanic Winter In East Africa From Ancient Toba (Super-Volcano) Eruption

    02/13/2018 10:06:52 AM PST · by blam · 7 replies
    UNIVERSITY OF ARIZONA—The massive Toba volcanic eruption on the island of Sumatra about 74,000 years ago did not cause a six-year-long "volcanic winter" in East Africa and thereby cause the human population in the region to plummet, according to new University of Arizona-led research. The new findings disagree with the Toba catastrophe hypothesis, which says the eruption and its aftermath caused drastic, multi-year cooling and severe ecological disruption in East Africa. "This is the first research that provides direct evidence for the effects of the Toba eruption on vegetation just before and just after the eruption," said lead author Chad...
  • Modern Humans in India Earlier Than Previously Thought?

    09/15/2013 4:57:07 PM PDT · by SunkenCiv · 18 replies
    Popular Archaeology ^ | Sat, Sep 14, 2013 | editors
    "We found the very first evidence for archaeological assemblages in association with the Toba ash", says Petraglia. "We found Middle Palaeolithic assemblages below and above the ash indicating the technologies being used at the time of the event. When the stone tool assemblages were analyzed from contexts above and below the ash, we found that they were very similar........We therefore concluded that the Middle Palaeolithic hominins survived the eruption and there was population continuity. This is not what would have been expected based on general theories that the Toba super-eruption decimated populations." Moreover, similar findings published by Christine Lane, et...
  • Archaeogenetic research refutes earlier findings

    06/13/2013 7:27:12 PM PDT · by SunkenCiv · 25 replies
    University of Huddersfield ^ | Monday, June 10, 2013 | unattributed (press release)
    ...a team of archaeologists excavating in India then claimed to have found evidence that modern humans were there before the eruption possibly as early as 120,000 years ago, much earlier than Europe or the Near East were colonised. These findings, based on the discovery of stone tools below a layer of Toba ash, were published in Science in 2007. Now Professor Richards working principally with the archaeologist Professor Sir Paul Mellars, of the University of Cambridge and the University of Edinburgh, with a team including Huddersfield University s Dr Martin Carr and colleagues from York and Porto has published his...
  • Toba super-volcano catastrophe idea 'dismissed'

    05/02/2013 7:34:42 PM PDT · by SunkenCiv · 19 replies
    BBC News ^ | Jonathan Amos
    The idea that humans nearly became extinct 75,000 ago because of a super-volcano eruption is not supported by new data from Africa, scientists say. In the past, it has been proposed that the so-called Toba event plunged the world into a volcanic winter, killing animal and plant life and squeezing our species to a few thousand individuals. An Oxford University-led team examined ancient sediments in Lake Malawi for traces of this climate catastrophe. It could find none... Researchers estimate some 2,000-3,000 cubic kilometres of rock and ash were thrown from the volcano when it blew its top on what is...
  • Super-Eruption: No Problem (Toba)

    07/06/2007 9:02:21 AM PDT · by blam · 22 replies · 1,327+ views
    Nature ^ | 7-6-2007 | Katherine Sanderson
    Super-eruption: no problem?Tools found before and after a massive eruption hint at a hardy population. Katharine Sanderson Massive eruptions make it tough for life living under the ash cloud. A stash of ancient tools in India hints that life carried on as usual for humans living in the fall-out of a massive volcanic eruption 74,000 years ago. Michael Petraglia, from the University of Cambridge, UK, and his colleagues found the stone tools at a site called Jwalapuram, in Andhra Pradesh, southern India, above and below a thick layer of ash from the eruption of the Toba volcano in Indonesia —...
  • Raikoke volcano news & activity updates:

    06/27/2019 9:02:47 AM PDT · by BenLurkin · 11 replies
    volcanodiscovery.com ^ | Thursday Jun 27, 2019 05:54 AM
    The activity at the small island volcano itself seems to have decreased a lot or even ceased - there are no more new ash alerts issued that mention new emissions at the volcano itself, and no significant heat signals can be found. However, VAAC Anchorage continues to alert about the possible remaining ash clouds from the main phase of the eruption during 21-22 June. On the other hand, most of this ash must by now have been dispersed sufficiently to fall below direct detection by satellite-based sensors. What is still clearly being detected is the significant SO2 gas plume: in...
  • Yellowstone volcano: Earthquake swarm hits deadly caldera which could be sign of ERUPTION

    05/02/2019 5:51:47 PM PDT · by SJackson · 137 replies
    Express ^ | Sean Martin
    YELLOWSTONE volcano could be about to erupt and challenge humanity’s existence as a spate of mini-quakes have been felt around the fearsome caldera. During the month of April, a total of 63 earthquakes struck around the Wyoming based supervolcano. All of the tremors were relatively small, with the largest registering at 2.6 on the Richter scale, hitting on April 29. But experts have warned that it is not necessarily about the strength of an earthquake around a volcano, but more the quantity of them. Some scientists believe that tremors around a volcano could be a sign that it might blow....
  • Geologists discover a new hotspot in Yellowstone supervolcano that's killing off trees

    04/06/2019 9:10:36 AM PDT · by rktman · 82 replies
    dailymail.co.uk ^ | 4/5/2019 | Cheyenne Macdonald
    Full Header: Geologists discover a new hotspot in Yellowstone supervolcano that's killing off trees in a patch of warm land the size of FOUR soccer fields A new thermal area has popped up in Yellowstone National Park, in yet another sign of the ever-changing magma activity beneath the surface. Satellite images have revealed an expanse of about eight acres – or the equivalent of four soccer fields – where the ground is warmer than its surroundings, causing the trees and vegetation in that patch to die off. While scientists have only just confirmed its existence, the United State Geological Survey...
  • A supervolcano caused the largest eruption in European history. Now it’s stirring again.

    12/22/2016 7:41:58 PM PST · by JimSEA · 31 replies
    Washington Post ^ | 12/21/2016 | Sarah Kaplan
    The Italian name for the caldera — Campi Flegrei, or “burning fields”— is apt. The 7.5-mile-wide cauldron is the collapsed top of an ancient volcano, formed when the magma within finally blew. Though half of it is obscured beneath the crystal blue waters of the Mediterranean, the other half is studded with cinder cones and calderas from smaller eruptions. And the whole area seethes with hydrothermal activity: Sulfuric acid spews from active fumaroles; geysers spout water and steam and the ground froths with boiling mud; and earthquake swarms shudder through the region, 125 miles south of Rome. And things seem...