background preloader

Výbuch supervulkánu

Facebook Twitter

Dana

Italian Supervolcano Is Far Closer To Erupting Than Previously Thought. Heads up, ladies and gentlemen – the Phlegraean Fields supervolcano, known in its native Italy as Campi Flegrei, is potentially on the edge of an eruption.

Italian Supervolcano Is Far Closer To Erupting Than Previously Thought

A brand new modeling study has concluded that the prolonged period of unrest it's going through has pushed the volcano closer to an eruption than previous research has suggested. As the team from University College London (UCL) and the Vesuvius Observatory have highlighted, the 13-kilometer-wide (8 miles) caldera has been rumbling for nearly 70 years. It seems to go through periods of inflation and deflation, which puts a lot of stress on the overlying crust, which keeps the magma trapped underground. It was initially thought that the energy used to stretch the crust in this way was lost during each deflation period, but, according to the team’s computer models, this isn’t true – it just accumulates over time, without really dissipating.

“It’s imperative that the authorities are prepared for this.” Severokorejský supervulkán Pektusan se probouzí k životu. Výbuch by mohl ovlivnit globální klima. What Would Happen If You Dropped A Nuclear Bomb Into A Volcano? A volcano is a lava-filled boil on the surface of the Earth, just waiting to build up enough pressure to spew out ash and lava.

What Would Happen If You Dropped A Nuclear Bomb Into A Volcano?

A nuclear bomb is an explosive, man-made weapon designed for destruction and chaos. It disintegrates everything in its local vicinity and irradiates everything in its range after that. But what happens when you combine one of man's most destructive creations with one of nature's? Útok na USA začne u sopky v Yellowstonu, říká ruský generál. Ядерный спецназ. Laacher See: The caldera in the middle of Europe. We’ve been discussing calderas recently on Eruptions (I wonder why) and the Laacher See in Germany came up.

Laacher See: The caldera in the middle of Europe

I’ve actually been to the Laacher See on a field trip lead by one of the world’s experts on the caldera, Dr. Gerhard Worner. So, I thought I’d post some pictures and talk a little about this feature that up until maybe 5 years ago, I didn’t even know existed. Laacher See, Germany. 1 s2 0 S0031018208005464 main. Fearmongering Gets Started in 2012: Laacher See is Not "Ready to Blow"

A quick post today about a tremendously terrible “article” in the Daily Mail this morning.

Fearmongering Gets Started in 2012: Laacher See is Not "Ready to Blow"

The headline reads “Is a super-volcano just 390 miles from London ready to blow?” It is, of course, referring to the Laacher See in western Germany – a caldera volcano that had a large eruption 12,900 years ago that covered a significant area of Europe with ash and tephra. Surely impressive considering how few people know about the caldera volcanism in central Europe. Pumice and ash deposits from the ~12,900 year ago eruption of Laacher See caldera in Germany, seen very close to the main caldera vents. Image by Erik Klemetti, taken in 2007. The article in the Daily Mail is about as substance free as you can produce – it starts off with the usual doom claptrap: “a sleeping super-volcano in Germany is showing worrying signs of waking up.” ” This monster erupts every 10 to 12,000 years and last went off 12,900 years ago, so it could blow at any time.” Toba catastrophe theory.

Supervulkán. Srovnání erupcí klasických vulkánů se supervulkány VEI7 a VEI8 Supervulkán je sopka schopná sopečnou erupcí produkovat ejekta větší než 1 tisíc kubických kilometrů.

Supervulkán

To je tisíckrát více než většina historických erupcí.[1] Supervulkán může vzniknout, pokud magma vystupuje na povrch z horkých skvrn, ale není schopno proniknout skrze zemskou kůru. Tlak vzrůstá a magma se rozšiřuje do chvíle, kdy není kůra schopná udržet tlak. Supervulkán může vzniknout v konvergentní zóně tektonických desek (například jezero Toba) a v kontinentálních horkých skvrnách (například Yellowstone). Známé supervulkány a jejich erupce[editovat | editovat zdroj] Na Zemi se nachází několik doložených supervulkánů, jejichž dřívější erupce způsobily obrovské katastrofy globálních rozměrů.

Explozivní síla VEI 8 (> 1000 km³ vyvrženého materiálu)[editovat | editovat zdroj] La Caldera Garita, Colorado, Spojené státy americké, Fish Canyon Tuff, před ~ 27,8 milionu let (množství vyvržené horniny ~ 5000 km³) Tobská katastrofa. Volcano Hazards Program - Yellowstone FAQs: Questions About Supervolcanoes. What is a supervolcano?

Volcano Hazards Program - Yellowstone FAQs: Questions About Supervolcanoes

Comparison of eruption sizes using the volume of magma erupted from several volcanoes. The term "supervolcano" implies a volcanic center that has had an eruption of magnitude 8 on the Volcano Explosivity Index (VEI), meaning the measured deposits for that eruption is greater than 1,000 cubic kilometers (240 cubic miles). The VEI scale was created as a general measurement of the explosivity of an eruption. There are multiple characteristics used to give an eruption its VEI allowing for the classification of current and historic eruptions. The most common criteria are volume of ejecta (ash, pumice, lava) and column height.

What are some other examples of supervolcanoes? Volcanoes that produced exceedingly voluminous pyroclastic eruptions and formed large calderas in the past 2 million years would include Yellowstone, Long Valley in eastern California, Toba in Indonesia, and Taupo in New Zealand. Not according to Bob Christiansen. ANSWER: Yes. List of Super Volcanoes of the World. Risk of supervolcano eruption big enough to 'affect the world' far greater than thought, scientists say - Science - News. An analysis of the molten rock within the dormant supervolcano beneath Yellowstone National Park in the United States has revealed that an eruption is possible without any external trigger, scientists said.

Risk of supervolcano eruption big enough to 'affect the world' far greater than thought, scientists say - Science - News

Scientists previously believed many supervolcanic eruptions needed earthquakes to break open the Earth’s crust so magma could escape. But new research suggests that this can happen as a result of the build-up of pressure. Supervolcanoes represent the second most globally cataclysmic event – next to an asteroid strike – and they have been responsible in the past for mass extinctions, long-term changes to the climate and shorter-term “volcanic winters” caused by volcanic ash cutting out the sunlight.

What Will Happen if Yellowstone Supervolcano Erupts? US Geological Survey uses computer simulation to show what will happen if Yellowstone erupts(v1ctory_1s_m1ne/Flickr) How would the US be affected if the supervolcano at Yellowstone National Park erupted?

What Will Happen if Yellowstone Supervolcano Erupts?

That's the question scientists have been considering in the journal Geochemistry, Geophysics, Geosystems. Experts from the US Geological Survey said while the chance of an eruption remains "very low", it has developed a computer model to simulate the distribution of volcanic ash following a "hypothetical large explosive eruption at Yellowstone". It said people frequently ask what would happen if Yellowstone erupted and results concluded an event of this kind would leave most of the US covered in a blanket of ash, with some areas buried in over a metre of the dust.

The report, Modeling ash fall distribution from a Yellowstone supereruption, provided simulations of an eruption that lasted three days, one week and one month. Will the Yellowstone Volcano Erupt in Our Lifetime? (+Map) The possibility of the volcano under Yellowstone National Park erupting is a hot topic right now, especially with the recent 4.8 magnitude earthquake and videos circulating that allegedly show animals fleeing the park.

Will the Yellowstone Volcano Erupt in Our Lifetime? (+Map)

The volcano under the park is so large and has the potential to produce such a massive eruption that it’s often referred to as a supervolcano. Earthquakes are common in the area, with between 1,000 and 2,000 quakes in the area per year due to the volcanic and tectonic nature of the region. Rising Number of Earthquakes But the 4.8 quake was the largest recorded since February 1980, and is part of an uplift of earthquake activity recently, caused by the upward movement of molten rock beneath the Earth’s crust, according to the U.S.

Geological Service. Modeling ash fall distribution from a Yellowstone supereruption - Mastin - 2014 - Geochemistry, Geophysics, Geosystems. Abstract We used the volcanic ash transport and dispersion model Ash3d to estimate the distribution of ashfall that would result from a modern-day Plinian supereruption at Yellowstone volcano.

Modeling ash fall distribution from a Yellowstone supereruption - Mastin - 2014 - Geochemistry, Geophysics, Geosystems

The simulations required modifying Ash3d to consider growth of a continent-scale umbrella cloud and its interaction with ambient wind fields. We simulated eruptions lasting 3 days, 1 week, and 1 month, each producing 330 km3 of volcanic ash, dense-rock equivalent (DRE). Results demonstrate that radial expansion of the umbrella cloud is capable of driving ash upwind (westward) and crosswind (N-S) in excess of 1500 km, producing more-or-less radially symmetric isopachs that are only secondarily modified by ambient wind.