This means the volume of deposits for that eruption is greater than 1,000 cubic kilometers (240 cubic miles). More and more pressure builds up in a large and growing magma pool until the crust can no longer take the pressure. 45 kilometres wide - large enough to hold the world's biggest city, a catastrophic volcanic winter. past: 2.1 million years ago, 1.3 million years ago and 640,000 years They release large amounts of gases. Type above and press Enter to search. Many volcanologists consider Iceland to be a large igneous province that is currently being formed. Yellowstone has experienced three supervolcanic eruptions in the ancient It is one of the Earth's largest known explosive eruptions. That’s roughly one thousand times more than the largest volcanic eruption ever … Location of Yellowstone hotspot over time (numbers indicate millions of years before the present). Lake Toba in Indonesia is big; in fact it is actually bigger than the Yellowstone caldera. An eruption at Yellowstone Caldera would result in air traffic being shut down, and communication would be affected as well. [9][11] Below is a list of well-known super-eruptions. Yellowstone Caldera is a crater that is approximately 34 miles by 45 miles in size. Based on incomplete statistics, at least 60 VEI 8 eruptions have been identified. This is thousands of times bigger than most volcanic eruptions which happened a long time. The Yellowstone Supervolcano experiences approximately 1000 to 2000 earthquakes a year but most are less than a 3 magnitude. The Oruanui eruption of New Zealand's Taupo Volcano (about 26,500 years ago)[2] was the world's most recent VEI-8 eruption. There are ancient calderas (supervolcanoes) in Britain: Glencoe in Scotland Shares. Kids Encyclopedia Facts. VEI 7 or VEI 8 eruptions are so powerful that they often form circular calderas rather than cones because the downward withdrawal of magma causes the overlying rock mass to collapse into the empty magma chamber beneath it. Volcanic eruptions are classified using the Volcanic Explosivity Index, or VEI. It is also referred to as the Yellowstone Supervolcano, which refers to its capability of producing an extremely violent volcanic eruption. That’s roughly one thousand times more than the largest volcanic eruption ever recorded in modern human history. The term "supervolcano" was first used in the BBC popular science television program Horizon in 2000 to mean eruptions of this type. Supervolcanoes occur when magma in the mantle rises into the crust but is unable to break through it and pressure builds in a large and growing magma pool until the crust is unable to contain the pressure. By Live Science Staff 02 October 2012. VEI 7 or VEI 8 eruptions are so powerful that they often form circular calderas rather than cones because the downward withdrawal of magma causes the overlying rock mass to collapse into the empty magma chamber beneath it. A volcano has three categories to fall under: Extinct (was a volcano but will never erupt again or is not expected), Dormant (has not erupted in thousands of years but is likely to erupt again), Active (has the potential to erupt at any stage or has erupted since the last ice age). It is one of the country's most active and most explosive volcanoes. The term entered the English language already in a 1925 book. In recorded history no one has experienced the fury of a supervolcano first hand but it is believed the impact that such an eruption could have would be deadly not only to people in the vicinity, but even for people on the other side of the world. to 300 million people. Satellite image of San Salvador, El Salvador and the Lake Ilopango caldera (also known as the Dark Age volcano) in the Valley of the Hammocks, site of a VEI 6-8 eruption and said to be ground zero for the extreme weather events of 535–536, when a dark veil settled on the world.

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