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Activités Volcaniques |
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ScienceDaily: Volcano News
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Volcano News and Research. Latest scientific research on how volcanoes work, predicting volcanic eruptions, climate change due to volcanic eruption and more.
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NASA radar to study Hawaii's most active volcano
An airborne radar developed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., has returned to Hawaii to continue its study of Kilauea volcano, Hawaii's current most active volcano.
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'Extinct' for 150 years, an iconic Galápagos giant tortoise species lives
Representatives of a giant tortoise species that had apparently been driven to extinction by humans more than 150 years ago must be alive today, if in very small numbers. Researchers have come to this conclusion based on the "genetic footprints" of the long-lost species Chelonoidis elephantopus in the DNA of their hybrid sons and daughters.
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Tortoise species thought to be extinct still lives, genetic analysis reveals
Dozens of giant tortoises of a species believed extinct for 150 years may still be living at a remote location in the Galápagos Islands, a genetic analysis reveals.
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Lava fingerprinting reveals differences between Hawaii's twin volcanoes
Hawaii's main volcano chains -- the Loa and Kea trends -- have distinct sources of magma and unique plumbing systems connecting them to the Earth's deep mantle, according to new research.
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Supervolcanoes: Not a threat for 2012
The geological record holds clues that throughout Earth's 4.5-billion-year lifetime massive supervolcanoes, far larger than Mount St. Helens or Mount Pinatubo, have erupted. However, despite the claims of those who fear 2012, there's no evidence that such a supereruption is imminent.
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Mapping the formation of an underwater volcano
On Oct. 9, 2011, an underwater volcano started to emerge in waters off El Hierro Island in the Canaries, Spain. Researchers only needed 15 days to map its formation in high resolution. The volcanic cone has reached a height of 100 m and the lava tongue flows down its side, even though its activity has slowed down in the past few days.
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Fiery volcano offers geologic glimpse into land that time forgot
The first scientists to witness exploding rock and molten lava from a deep sea volcano, seen during a 2009 expedition, report that the eruption was near a tear in Earth's crust that is mimicking the birth of a subduction zone.
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CSI-style investigation of meteorite hits on Earth
Volcanologists have forensically reconstructed the impact of a meteorite on Earth and how debris was hurled from the crater to devastate the surrounding region.
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Possible trigger for volcanic 'super-eruptions' discovered
The "super-eruption" of a major volcanic system occurs about every 100,000 years and is considered one of the most catastrophic natural events on Earth, yet scientists have long been unsure about what triggers these violent explosions. A new model points to a combination of temperature influence and the geometrical configuration of the magma chamber as a potential cause for these super-eruptions.
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Tenerife geology discovery is among 'world's best': Holiday Island landscape reveals explosive past
Volcanologists have uncovered one of the world's best-preserved accessible examples of a monstrous landslide that followed a huge volcanic eruption on the Canarian island of Tenerife.
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Deep recycling in Earth faster than thought
The recycling of Earth's crust in volcanoes happens much faster than scientists have previously assumed. Rock of the oceanic crust, which sinks deep into the earth due to the movement of tectonic plates, reemerges through volcanic eruptions after around 500 million years.
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New eruption discovered at undersea volcano, after successfully forecasting the event
Scientists just discovered a new eruption of Axial Seamount, an undersea volcano located about 250 miles off the Oregon coast -- and one of the most active and intensely studied seamounts in the world. The event is intriguing because the scientists had forecast the eruption starting five years ago -- the first successful forecast of an undersea volcano.
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Guam researcher studies Mount Pinatubo ecosystem recovery: Primary succession on the slopes
A Guam ecologist recently mobilized efforts to characterize the vegetation that has recovered following the eruption of Mount Pinatubo, Philippines.
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Long distance: Research shows ancient rock under Haiti came from 1,000+ miles away
Earthquakes and volcanoes are known for their ability to transform Earth's surface, but new research in the Caribbean has found they can also move ancient Earth rock foundations more than 1,000 miles.
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Underwater Antarctic volcanoes discovered in the Southern Ocean
Scientists have discovered previously unknown volcanoes in the ocean waters around the remote South Sandwich Islands. Using ship-borne sea-floor mapping technology during research cruises onboard the RRS James Clark Ross, the scientists found 12 volcanoes beneath the sea surface -- some up to 3 km high. They found 5 km diameter craters left by collapsing volcanoes and seven active volcanoes visible above the sea as a chain of islands.
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Australian volcano eruptions overdue, new study confirms
Latest research into the age of volcanos in parts of Australia has confirmed that certain regions are overdue for an eruption, potentially affecting thousands of local residents.
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GOES satellites see ash still spewing from Chilean volcano
The Puyehue-Cordon volcano in Chile continues to spew ash that is still disrupting travel as far as Australia and New Zealand this week.
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NASA satellite gallery shows Chilean volcano plume moving around the world
Since its eruption in early June, several NASA satellites have captured images of the ash plume from the eruption of the Chilean Volcano called Puyehue-Cordón Caulle and have tracked it around the world. NASA has collected them in an image gallery that shows the progression of the plume around the southern hemisphere.
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Earth from space: A gush of volcanic gas
A new image shows the huge plume of sulphur dioxide that spewed from Chile?s Puyehue-Cordón Caulle Volcanic Complex, which lies in the Andes about 600 km south of Santiago.
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Satellites see eruption of Chile's Puyehue-Cordón volcano from space
NASA's Terra Satellite, the GOES-13 and GOES-11 satellites all captured images of the ash plume from southern Chile's Puyehue-Cordón Volcano. The volcano is located in Puyehue National Park in the Andes of Ranco Province of Chile.
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3-D model mimics volcanic explosions
A 3-D model of a volcanic explosion, based on the 1980 eruption of Mount St. Helens in Washington state, may enhance our understanding of how some volcanic explosions occur and help identification of blast zones for potentially dangerous locations, according volcanologists.
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Bleach in the Icelandic Volcanic Cloud
Chlorine in the ash plume of the Icelandic volcano Eyjafjallajökull attacked atmospheric trace gases. One year after the Eyjafjallajökull volcano in Iceland brought European air traffic to a standstill its ash plume revealed a surprising scientific finding: Researchers found that the ash plume contained not only the common volcanic gas sulfur dioxide, but also free chlorine radicals. Chlorine radicals are extremely reactive and even small amounts can have a profound impact on local atmospheric chemistry. The findings give solid evidence of volcanic plume chlorine radical chemistry and allowed calculations of chlorine radical concentrations.
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Novel ash analysis validates volcano no-fly zones
Air safety authorities essentially had to fly blind when the ash cloud from Eyjafjallajökull caused them to close the airspace over Europe last year. Now nanoscientists have developed a way to provide the necessary information within hours.
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Electric Yellowstone: Conductivity image hints supervolcano plume is bigger than thought
Geophysicists have made the first large-scale picture of the electrical conductivity of the gigantic underground plume of hot and partly molten rock that feeds the Yellowstone supervolcano. The image suggests the plume is even bigger than it appears in earlier images made with earthquake waves.
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NASA airborne radar set to image Hawaiian volcano
The Kilauea volcano that recently erupted on the Big Island of Hawaii will be the target for a NASA study to help scientists better understand processes occurring under Earth's surface.
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Activités Volcaniques