Le Yellowstone entre en éruption environ tous les 600.000 ans.
(Image credit: Kelvin Case via Wikimedia Commons, CC-BY-3.0)Receive mail from us on behalf of our trusted partners or sponsors? The 1980 eruption of Mount St. Helens measured 5 on the VEI; because the scale is logarithmic, a level-8 supereruption is about 1,000 times more explosive than that. newspaper archive.Hawaii volcano ERUPTION: Kilauea lava dome bursts 70ft highIndonesia volcano ERUPTION update: Mount Sinabung spews LAVA and ASHYellowstone volcano eruption: Zone One would be the most deadly impact areaYellowstone volcano eruption: The ash fallout would impact crops and livestock across the USYellowstone volcano eruption: Ash fallout would coat the US from coast to coast It's one of two newly detected 'supereruptions' that rocked North America (and the world) 9 million years ago.Now, the discovery of two ancient supereruptions — including the single largest in the hotspot's history — reveals an unexpected trend: The Yellowstone hotspot's activity may finally be waning.Researchers made the new discovery, which was published June 1 in the journalAccording to the study authors, the new discovery rewrites the hotspot's ancient history.

This map was created by a user. newspaper archive.Yellowstone volcano ERUPTION warning: Hundreds of bison dead in cullYellowstone mining ban: Officials push to ban gold and silver miningYellowstone eruption map: The supervolcano would blanket the US in volcanic ashYellowstone eruption: Scientists are not expecting a blast anytime soonYellowstone eruption: The volcano's eruption could destabilise global climates

The area in and around Yellowstone National Park has seen tremendous volcanic activity in its past.

Using a multidisciplinary approach, the team correlated widely-separated volcanic deposits in Idaho and Nevada with seven characteristics, including the color of the rock, the rock's age, its chemical composition and the polarity of magnetic minerals inside the rocks.It turned out that a smattering of volcanic deposits previously attributed to a series of small eruptions actually resulted from two gargantuan ones. This map from the U.S. Geological Survey shows the simulated ashfall distribution resulting from a month-long eruption at the Yellowstone volcano, using different wind fields for … ©Mark Ralston / AFP - A + A L'éruption du Yellowstone, un super-volcan situé aux Etats-Unis, causerait des dégâts apocalyptiques et finira forcément par se produire.

This eruption covered roughly 8,900 square miles (23,000 square km) of what is now southern Idaho and northern Nevada — making it the single largest eruption of the Yellowstone hotspot ever detected.This epic eruption appears to have been about 30% larger than the hotspot's next-biggest eruption, which occurred 2.1 million years ago. Predicting Old Faithful: The time to the next eruption, the interval, is predicted using the duration of the current eruption. This double-sided map is 11" X 17" so you'll need to set your printer accordingly.. To download official maps in PDF, Illustrator, or Photoshop file formats, visit the National Park Service cartography site.. Cette caldeira fut découverte lors de fouilles dirigées par Bob Christiansen de l'Institut d'études géologiques des États-Unis pendant les années 1960 et 1970. And Pacific Northwest cities of Portland and Seattle receive up to a few centimetres.”According to FEMA, even in Zone Six which extends more than 800km away from the mega blast, Yellowstone’s ash would still have devastating effects.Buildings would likely suffer minor damage in the fallout, cars would lose traction on roads and the ensuing lack of food and communication could collapse livestock production.The estimated ash fallout in Zone Six is between one and six centimetres.Thankfully there is absolutely no indication the Yellowstone super volcano is anywhere near blowing up.Jacob Lowenstern, a research geologist at the US Geological Survey (USGS), said Yellowstone erupting in our lifetime is an unlikely scenario.The expert said: “It’s not impossible to rule out, but it’s a remote possibility.”Geoscientist Christy Till agreed, underlining: “All signs of activity at Yellowstone are normal – there are no signs of eruption as some media outlets reporting.” See today's front and back pages, download the newspaper,

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