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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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Making an explosive double date with Russian volcanoes
Two French scientists are traveling to one of the remotest places on Earth, the Kamchatka peninsula, to piece together the complex life story of two volcanoes. Kamchatka is a unique site for studying how volcanic cycles shaped the landscape of the early Earth.
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Eruptive characteristics of Oregon's Mount Hood analyzed
A new study has found that a mixing of two different types of magma is the key to the historic eruptions of Mount Hood, Oregon's tallest mountain, and that eruptions often happen in a relatively short time -- weeks or months -- after this mixing occurs. It will help scientists better understand the nature of Mount Hood's past and future eruptions, as well as other volcanoes that erupt by similar mechanisms. This includes a large number of the world's active volcanoes.
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Accepted theory explaining frequent eruptions at Italy?s Stromboli volcano questioned
One volcano that volcanologists believe they understand fairly well is Italy's Stromboli, which has been erupting every five to 20 minutes for thousands of years, spewing fountains of ash and magma several meters into the sky. For several decades, scientists have pretty much used one theory to explain what is causing huge amounts of gas to erupt so frequently: swimming-pool-sized bubbles that travel through a few hundred meters of molten magma before popping at the surface. But they may be wrong, according to new research.
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Scientists assess impact of Icelandic volcanic ash on ocean biology
An international team of oceanographers investigating the role of iron on ocean productivity in the northerly latitudes of the Atlantic Ocean will assess the impact of ash from the recent Icelandic volcano eruption on ocean biology. The five-week expedition started out on July 4, 2010.
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Volcanic ash research shows how plumes end up in the jet stream
A volcanologist has shown how the jet stream -- the area in the atmosphere that pilots prefer to fly in -- also seems to be the area most likely to be impacted by plumes from volcanic ash.
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Volcanic emissions used to study Earth?s atmospheric past
On March 20, Iceland's Eyjafjallajokull volcano woke from its nearly 200-year slumber to change the way the world viewed volcanoes forever. Bringing almost all transatlantic air travel to a halt for the first time in modern history, this volcano reminded humanity of the powers these forces of nature contain -- and of our relative inability to understand them. Researchers have studied this event and other massive volcanic eruptions and their atmospheric consequences in the past in North America.
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Experts gather as volcanic dust settles
Following the eruption of Iceland's Eyjafjallajoekull volcano that spewed huge amounts of ash and grounded numerous flights, more than 50 experts from around the world gathered at a workshop organized by ESA and EUMETSAT to discuss what has been learned and identify future opportunities for volcanic ash monitoring.
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Electric ash found in Eyjafjallajokull's plume, say UK researchers
In the first peer-reviewed scientific paper to be published about the Icelandic volcano since its eruption in April 2010, UK researchers write that the ash plume which hovered over Scotland carried a significant and self-renewing electric charge.
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Envisat captures renewed volcanic activity
New eruptions from Iceland's Eyjafjallajoekull volcano have produced a 1600 km-wide ash cloud over the Atlantic. The brownish plume, traveling east and then south, is clearly visible in stark contrast to white clouds framing this Envisat image from May 6.
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Unearthing the truth about volcanic ash: Spain has been spared for 40,000 years, and other facts
Research from scientists in the UK shows Spain has been spared volcanic ash falls for the past 40,000 years and so could serve as an emergency flight hub in the event of future eruptions.
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First detailed underwater survey of huge volcanic flank collapse deposits
Oceanographers are mapping an extremely large landslide deposits offshore from an active volcano on Montserrat in the Lesser Antilles.
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'Oil spill, flooding create perfect storm' for commerce, shipping, says supply chain professor
The oil spill in the Gulf of Mexico and epic flooding in Tennessee have created a "perfect storm" for businesses that rely on an efficient supply chain, according to one professor. In addition, the volcano in Iceland is causing unprecedented interruptions in the ability of businesses in Europe and the Baltic regions to ship goods via air transport.
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NASA satellite views massive Gulf oil spill
A pair of instruments aboard NASA's Terra spacecraft captured new images of the growing oil spill in the Gulf of Mexico on May 1, 2010.
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More trouble ahead from volcanic ash?
Iceland's Eyjafjallajokull volcano continues to be active, but the full effects of volcanic ash on the aviation industry have yet to be seen, according to an aviation expert from the UK who believes the impact of ash on airplane air-conditioning systems could be serious and will build over the next few weeks as planes begin to 'hoover up' the additional ash in the atmosphere.
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Scientists study 'glaciovolcanoes,' mountains of fire and ice, in Iceland, British Columbia, US
Glaciovolcanoes, they're called, these rumbling mountains where the orange-red fire of magma meets the frozen blue of glaciers.
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Eyjafjallajokull's global fallout: Airports affected are not necessarily the ones you would think
To gauge Eyjafjallajokull's global impact, researchers studied the worldwide air transportation network before and after 27 major European airports were closed. They found mobility patterns in places far from Europe -- including the United States, India and southeast Asia -- were significantly affected by the European disruption, to the surprise of the team. At the top of the list of most affected airports still operating were Singapore, Hong Kong and Beijing.
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Ash plume of Eyjafjallajoekull volcano monitored
The development of the ash plume from Iceland's Eyjafjallajoekull volcano has been tracked since March 20. In the latest Envisat image acquired April 22 at 13:36 CEST, less ash is visible.
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More accurate mapping of ash cloud from volcano in Iceland
Scientists are following the progress of the ash cloud from the Eyjafjallajökul volcano across Denmark. New research provides more details about the actual height and development of the ash cloud as well as qualitative measurements of the volcanic ash concentrations in the cloud.
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Two NASA Satellites Capture Eyjafjallajokull's Ash Plume
NASA's Aqua and Terra satellites fly around the world every day capturing images of weather, ice and land changes. Over the last three days these satellites have provided visible and infrared imagery of the ash plume from the Eyjafjallajokull volcano in Iceland.
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Volcanic eruption in Iceland unlikely to have global effects
The eruption of an Icelandic volcano that sent a huge plume of ash into the atmosphere and caused sweeping disruptions of air traffic over Great Britain and Scandinavia today will likely dissipate in the next several days, according to an atmospheric scientist.
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Iceland volcano could continue erupting for more than a month, researcher says
The airspace over much of northern Europe remains shut and the Norwegian Prime Minister, Jens Stoltenberg, is stranded in New York City because of the threat from a volcanic ash plume being belched out of Iceland. How long will the eruption of the Eyjafjallajokull volcano continue and what other kinds of activity can we expect? A volcanologist in Norway who has worked extensively in Iceland says a month-long eruption would not be out of the question. But the eruption could also continue for a year or more, he says.
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Icelandic volcanoes can be unpredictable and dangerous
If history is any indication, the erupting volcano in Iceland and its immense ash plume could intensify, says a researcher who has explored Icelandic volcanoes for the past 25 years.
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Terra Satellite sees Iceland volcano's ash moving into Germany
NASA's Terra satellite has captured another image of Iceland's Eyjafjallajökull volcano ash cloud, now moving into Germany. Eyjafjallajökull continues to spew ash into the air and the ash clouds are still impacting air travel in Northern Europe.
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Iceland eruption: New satellite image of volcanic ash cloud
A vast cloud of volcanic ash has been sweeping across parts of northern Europe from the eruption of a volcano in Iceland. The European Space Agency's Envisat satellite has imaged the ash cloud, showing for example the extent over the UK, more than 1,000 kilometers away.
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NASA sensors providing rapid estimates of Iceland volcano emissions
A NASA research team is using the latest advances in satellite artificial intelligence to speed up estimates of the heat and volume of lava escaping from an erupting volcano in Iceland.
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Activités Volcaniques