Supervolcano - Wikipedia. According to the USGS, the term . 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. This can occur at hotspots (for example, Yellowstone Caldera) or at subduction zones (for example, Toba). Another setting for the eruption of very large amounts of volcanic material is in large igneous provinces, which can cover huge areas with lava and volcanic ash, causing long- lasting climate change (such as the triggering of a small ice age), which can threaten species with extinction. The Oruanui eruption of New Zealand's Taupo Volcano (about 2.

In 1. 92. 5, Edwin T. Hodge suggested that a very large volcano, which he named Mount Multnomah, had existed in that region. He believed that several peaks in the Three Sisters area are the remnants left after Mount Multnomah had been largely destroyed by violent volcanic explosions, similar to Mount Mazama. The book was reviewed in 1.

F. Eruptions that rate VEI 8 are termed super eruptions. When created, these regions often occupy several thousand square kilometres and have volumes on the order of millions of cubic kilometers. In most cases, the lavas are normally laid down over several million years. They release large amounts of gases. The scientific consensus is that a meteor impact was the cause of the extinction event, but the volcanic activity may have caused environmental stresses on extant species up to the Cretaceous–Paleogene boundary. Many volcanologists consider that Iceland may be a LIP that is currently being formed. The last major outpouring occurred in 1.

Laki fissure which is approximately 4. An estimated 1. 4 km. The Ontong Java Plateau now has an area of about 2,0. Manihiki and Hikurangi Plateaus broke away. Massive explosive eruptions. It is a logarithmic scale, which means that an increase of one in VEI number is equivalent to a tenfold increase in volume of erupted material.

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. VEI 8 eruptions are colossal events that throw out at least 1,0. These eruptions ejected ~1. At Krakatoa, the Dutch colonial authorities claimed that the death toll was 3.

The 1. 98. 0 Mount St. Helens eruption was a VEI 5 eruption, with 1. Known supereruptions. The only ones in the past 2,0. Tambora, in 1. 81. Year Without a Summer. Mount Rinjani. Lombok Island, West Nusa Tenggara.

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Indonesia. 12. 57 Samalas eruption. Possible trigger of the Little Ice Age.

Millennium Eruption. Taupo Volcano (Lake Taupo)Taupo Volcanic Zone. New Zealand, North Island. Hatepe eruption AD 2. The same year, ABC News aired the documentary Last Days on Earth, which featured a segment called . Rodney Mc. Kay, one of the main characters, uses Yellowstone National Park to describe what a supervolcano is. In the episode . This made most of the United States uninhabitable.

In 2. 01. 0, the Sy. Fy series Warehouse 1.

Reset in which a supervolcano, specifically the Yellowstone Caldera, plays an important role. In December 2. 01. Harry Turtledove published Supervolcano: Eruption, the first of a planned four- novel series about events leading up to and following a fictional eruption of the Yellowstone Caldera. The second book in the series, Supervolcano: All Fall Down, was published in December 2. The third book Supervolcano: Things Fall Apart, was published in December 2.

At the end of Terry Pratchett and Stephen Baxter's novel Long War the Yellowstone Caldera erupts. The aftermath is featured in the next volume, Long Mars. The Siberian Traps and Lake Toba were featured in Animal Planet's prehistoric documentary Animal Armageddon (each in one episode), where speculation of the lifeforms they afflicted were brought to life. See also. Journal of Volcanology and Geothermal Research. Retrieved 2. 01. 2- 0.

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