which of these volcanic eruptions types is the least violent
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Types of volcanic eruptions Several types of volcanic eruptions —during which lava, tephra (ash, lapilli, volcanic bombs and blocks), and assorted gases are expelled from a volcanic vent or fissure —have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed.here are two types of eruptions in terms of activity, explosive eruptions and effusive eruptions. Explosive eruptions are characterized by gas-driven explosions that propels magma and tephra. Effusive eruptions, meanwhile, are characterized by the outpouring of lava without significant explosive eruption.
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Types of Volcanic Eruptions The largest and most violent of all the types of volcanic eruptions are Plinian eruptions. They are caused by the fragmentation of gassy magma, and are usually associated with very viscous magmas (dacite and rhyolite).ere are some of the most common types of eruptions: In a Hawaiian eruption, fluid basaltic lava is thrown into the air in jets from a vent or line of vents (a fissure) at the summit or on the flank of a volcano. The jets can last for hours or even days, a phenomenon known as fire fountaining.
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Geophysical hazards: volcanic eruptions Geophysical hazards: volcanic eruptions. Definition and characteristics. Volcanic eruptions happen when lava and gas are discharged from a volcanic vent. The most common consequences of this are population movements as large numbers of people are often forced to flee the moving lava flow.Volcanic eruptions often cause temporary food shortages and volcanic ash landslides called Lahar.The most dangerous type of volcanic eruption is referred to as a 'glowing avalanche'.he most common consequences of this are population movements as large numbers of people are often forced to flee the moving lava flow. Volcanic eruptions often cause temporary food shortages and volcanic ash landslides called Lahar. The most dangerous type of volcanic eruption is referred to as a 'glowing avalanche'.
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Lava Flows Lava Flows. The major eruptive product of Hawaiian volcanoes is lava. Lava flows can form during fountaining eruptions or they can well out of the ground with little or no pyroclastic activity. There are two major types of basaltic lava flow, ' a'a and pahoehoe.ava flows can form during fountaining eruptions or they can well out of the ground with little or no pyroclastic activity.
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Tectonics and Volcanoes of the Philippines The volcanoes of the Philippines are the most deadly and costly in the world. Fatalities have been caused by 13% of the historic eruptions, most notably at Taal and Mayon, and 22% of the eruptions caused damage. Mudflows are more common in the Philippines, compared to other regions, because of heavy rains.
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- 80% of the world's active volcanoes are found occur along destructive boundaries. Aci … d-lava and composite volcanoes also cause the most violent eruptions as the lava is viscous and the opening of the volcano is sometimes blocked by hardened lava, causing a huge massive explosion during the eruption.cientist believe the most powerful volcanic eruption occurred approximately 2 million years ago when the Yellowstone Caldera erupted. It produced an eruption 2500 times more … powerful than the May 1980 Mt. St. Helens eruption. The two most destructive volcanoes in the past 200 years are located in Indonesia.
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- Non explosive eruptions are favored by low gas content and low viscosity magmas (basaltic to andesitic magmas). If the viscosity is low, non-explosive eruptions usually begin with fire fountains due to release of dissolved gases. When magma reaches the surface of the earth, it is called lava.Since it its a liquid, it flows downhill in response to gravity as a lava flows. Different magma types behave differently as lava flows, depending on their temperature, viscosity, and gas content.hen magma reaches the surface of the earth, it is called lava. Since it its a liquid, it flows downhill in response to gravity as a lava flows. Different magma types behave differently as lava flows, depending on their temperature, viscosity, and gas content.
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Types of Volcanic Eruptions The most common type of volcanic eruption occurs when magma (the term for lava when it is below the Earth's surface) is released from a volcanic vent. Eruptions can be effusive, where lava flows like a thick, sticky liquid, or explosive, where fragmented lava explodes out of a vent. Vulcanian eruption is a short, violent, relatively small explosion of viscous magma (usually andesite, dacite, or rhyolite). This type of eruption results from the fragmentation and explosion of a plug of lava in a volcanic conduit, or from the rupture of a lava dome (viscous lava that piles up over a vent).
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- Volcanic Landforms Explosive Eruptions A second category of volcanoes are those characterized by explosive eruptions. Explosive eruptions are common to volcanoes with very viscous lava and high amounts of gas under pressure.xplosive eruptions are common to volcanoes along the  Ring of Fire , a string of volcanoes extending from the northwest coast of the United States, up through the Aleutian Islands, and into Japan.
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Types of volcanic eruptions Hawaiian eruptions are a type of volcanic eruption, named after the Hawaiian volcanoes with which this eruptive type is hallmark. Hawaiian eruptions are the calmest types of volcanic events, characterized by the effusive eruption of very fluid basalt-type lavas with low gaseous content. The strongest types of eruptions, with a VEI of 8, are so-called Ultra-Plinian eruptions, such as the most recent one at Lake Toba 74 thousand years ago, which put out 2800 times the material erupted by Mount St. Helens in 1980.
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Types of Volcanic Eruptions Hawaiian eruption. In a Hawaiian eruption, fluid lava is ejected from a vent as fire fountains or lava flows. The 1969 eruption at Mauna Ulu, a vent of Kilauea Volcano in Hawaii, was a spectacular example of fire fountaining. Photo by D.A. Swanson, USGS, August 22, 1969.ere are some of the most common types of eruptions: In a Hawaiian eruption, fluid basaltic lava is thrown into the air in jets from a vent or line of vents (a fissure) at the summit or on the flank of a volcano. The jets can last for hours or even days, a phenomenon known as fire fountaining.
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Shield volcano One of the two most important types of volcanoes, shield volcanoes are large and broad and have relatively gentle slopes. Kilauea on the island of Hawaii is good example of a shield volcano.Eruptions on shield volcanoes are far less explosive than those on composite volcanoes.That is because the basalt lava that erupts from shield volcanoes contains less silica, SiO 2, and is therefore less sticky (less viscous) and doesn't plug up the volcano. shield volcano is a type of volcano usually built almost entirely of fluid magma flows. They are named for their large size and low profile, resembling a warrior's shield lying on the ground. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted from stratovolcanoes.
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- The more fluid a magma, the more likely it is to erupt. On the other hand, when more viscous (higher viscosity) lavas do erupt, they usually do so explosively. Viscosity also affects the shapes of lava flows and the mountains they erupt from. The more viscous the magma, the fatter the lava flow. Also, the more viscous the magmas a volcano erupts, the steeper the volcano. Thus, shield volcanoes like we have in Hawai'i have gentle slopes (less than 10 degrees), while stratovolcanoes like the Cascades in the northwestern mainland are much steeper (roughly 25 degrees).
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Types of volcanic eruptions Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed.
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Types of Volcanic Eruptions Volcanologists classify eruptions into several different types. Some are named for particular volcanoes where the type of eruption is common; others concern the resulting shape of the eruptive products or the place where the eruptions occur.Here are some of the most common types of eruptions:In a Hawaiian eruption, fluid basaltic lava is thrown into the air in jets from a vent or line of vents (a fissure) at the summit or on the flank of a volcano. The jets can last for hours or even days, a phenomenon known as fire fountaining.olcanologists classify eruptions into several different types. Some are named for particular volcanoes where the type of eruption is common; others concern the resulting shape of the eruptive products or the place where the eruptions occur.
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- The most violent type of volcanic eruption is a Plinian eruption.  This is also one of the largest types of eruptions. This was the  type of eruption of the famed Mount Vesu … vius in 79 AD.0% of the world's active volcanoes are found occur along destructive boundaries. Aci … d-lava and composite volcanoes also cause the most violent eruptions as the lava is viscous and the opening of the volcano is sometimes blocked by hardened lava, causing a huge massive explosion during the eruption.
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High School Earth Science/Volcanic Eruptions A second type of volcanic eruption is a non-explosive or effusive eruption (Figure 8.11). Because the composition of magma is different in different volcanoes, the properties of the lava are different. In effusive eruptions, lava flows are relatively calm and do not explode out of the volcano.
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- Lavas and pyroclastics are usually andesitic to rhyolitic in composition. Due to the higher viscosity of magmas erupted from these volcanoes, they are usually more explosive than shield volcanoes. Stratovolcanoes sometimes have a crater at the summit that is formed by explosive ejection of material from a central vent.
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Types of volcanic eruptions Plinian eruptions (or Vesuvian) are a type of volcanic eruption, named for the historical eruption of Mount Vesuvius in 79 of Mount Vesuvius that buried the Roman towns of Pompeii and Herculaneum and, specifically, for its chronicler Pliny the Younger. The strongest types of eruptions, with a VEI of 8, are so-called Ultra-Plinian eruptions, such as the most recent one at Lake Toba 74 thousand years ago, which put out 2800 times the material erupted by Mount St. Helens in 1980.
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I don't know where I'm a gonna go when the volcano blows The type of eruptions in Hawai'i are known as hawaiian volcanism and are far less dangerous than the eruptions produced by Mount St. Helens. It is important to know what type of an eruption a volcano is most likely to produce so that the types of hazards produced by such an eruption can be identified.he type of eruptions in Hawai'i are known as hawaiian volcanism and are far less dangerous than the eruptions produced by Mount St. Helens. It is important to know what type of an eruption a volcano is most likely to produce so that the types of hazards produced by such an eruption can be identified.
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Volcanic eruptions - death toll worldwide up to 2016 A volcanic eruption is defined as a discharge of lava and gas from a volcanic vent or fissure. Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. The most common consequences of this are population movements, economic loss, affected people and deaths.he economic loss caused by major volcanic eruptions varies from 1,000 million U.S. during the volcanic eruption in Colombia, November 13, 1995, to 80 million U.S. dollar caused by the volcanic eruption in Japan in 1945.
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Volcanoes Volcanoes form in three different tectonic settings. Subduction zone volcanoes form at the boundaries of two plates where one plate overrides another. Subduction zone volcanoes are the most violent and destructive of the volcanic types.Mt. St. Helens, Mt. Pinatubo, Krakatoa, and Mt. Vesuvius are all famous explosive subduction zone volcanoes.olcanoes form in three different tectonic settings. Subduction zone volcanoes form at the boundaries of two plates where one plate overrides another. Subduction zone volcanoes are the most violent and destructive of the volcanic types.
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Types of Volcanic Eruptions A Vulcanian eruption is a short, violent, relatively small explosion of viscous magma (usually andesite, dacite, or rhyolite). This type of eruption results from the fragmentation and explosion of a plug of lava in a volcanic conduit, or from the rupture of a lava dome (viscous lava that piles up over a vent).olcanologists classify eruptions into several different types. Some are named for particular volcanoes where the type of eruption is common; others concern the resulting shape of the eruptive products or the place where the eruptions occur. Here are some of the most common types of eruptions:
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- The type of volcano and eruption from basaltic magma would be a  cinder cone volcano. The eruption would be a mild explosive  eruption. It would be mainly ash and scoria. 3 people found this useful.
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Types of Volcanic Eruptions A Vulcanian eruption is a short, violent, relatively small explosion of viscous magma (usually andesite, dacite, or rhyolite). This type of eruption results from the fragmentation and explosion of a plug of lava in a volcanic conduit, or from the rupture of a lava dome (viscous lava that piles up over a vent).ere are some of the most common types of eruptions: In a Hawaiian eruption, fluid basaltic lava is thrown into the air in jets from a vent or line of vents (a fissure) at the summit or on the flank of a volcano. The jets can last for hours or even days, a phenomenon known as fire fountaining.
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- Confidence votes 179. Those of Cinder Cone volcanoes. The scale of violent eruptions is based upon the Volcanic Explosive Index (VEI) and it is as follows: 1: Hawaiian and other similar effusive eruptions which erupt almost 100% lava, a small amount of ash and a lot of fume like Mauna Loa, Kilauea on Hawaii.ci … d-lava and composite volcanoes also cause the most violent eruptions as the lava is viscous and the opening of the volcano is sometimes blocked by hardened lava, causing a huge massive explosion during the eruption. 5 people found this useful. Answered. In Volcanoes.