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Super volcano

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Super volcano

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  1. Toba is a supervolcano on the Indonesian island of Sumatra. It has blown its top many times but this eruption, 74,000 years ago, was exceptional. Releasing 2500 cubic kilometres of magma – nearly twice the volume of mount Everest – the eruption was more than 5000 times as large as the 1980 eruption of mount St Helens in the US, making it the largest eruption on Earth in the last 2 million years. Super volcano http://sciblogs.co.nz/visibly-shaken/tag/volcanoes/

  2. www.cotf.edu/ete/modules/volcanoes/vsizeserupt1.html How Large is Large? There is no universally accepted scale, comparable to the Richter Scale for earthquakes, for classifying the sizes of volcanic eruptions. However, one useful comparison is the volume of new volcanic rock blasted out by an eruption. Volumes of new volcanic rock are represented on this page in two ways: by the figure at right, which pictorially compares ejected volumes, and by the table below, which shows similar, numerical data. Super volcano This eruption killed all but 3 people in the island’s capital! Volumes are approximate. 1 mi3 = 4.168 km3

  3. http://modernsurvivalblog.com/volcano/how-big-are-volcano-magma-chambers/http://modernsurvivalblog.com/volcano/how-big-are-volcano-magma-chambers/ Trying to visualise the amount of magma and gas available to erupt from a volcano. I am not sure how scientific this web source is, and remember that a magma chamber is rarely a giant cavern full of magma. Super volcano Remember that volcano that disrupted European air traffic for a few weeks during April, 2010? Have any idea how big its magma chamber would be if it were shaped like a sphere? Volcanoes are rated on a scale called the Volcanic Explosivity Index, or VEI. The VEI scale ranges from 1 to 8, and each incremental whole number represents an explosivity of ten times the previous digit. In other words, the ash, rock, magma, ejecta of a VEI-4 volcano can be up to 10 times that of a VEI-3 volcano. The Icelandic volcano, Eyjafjallajokull, having a rating of VEI-4 would mean that it has the potential to release between 100,000,000 (100 Million) and 1,000,000 (1 Billion) cubic meters of ash – ejecta – tephra. To visualize the volume of how big that is, it would be the equivalent of having a magma chamber shaped as a sphere, the size of 4 Eiffel Towers stacked on top of each-other and spun into a spherical circle! That puts a new perspective on things… Lastly, the VEI-8, a SuperVolcano capable of holding and releasing the equivalent spherical volume of 10 Trillion cubic meters, a sphere with a diameter of 26 kilometers (nearly 17 miles), is unimaginable. Such an eruption would wreak annihilation and devastation never before witnessed. Global climate would be profoundly affected. Yellowstone (USA), Long Valley (USA), Lake Toba (Indonesia), and Taupo (New Zealand) fit into this category.

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