what are the factors that determine how violent a volcanic eruption will be?
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The two main factors that influence how a volcano will erupt are viscosity and gas content. Both are related to the composition of the magma . Hawaiian volcanoes tend to erupt basalt , which is low in viscosity and low in gas content (about 0.5 weight percent).
183428
Collection and analysis of data indicates that constructive forces include crustal deformation, faulting, volcanic eruption and deposition of sediment, while destructive forces include weathering and erosion.
845987
The primary factors that determine the nature of volcanic eruptions include the magma's temperature, its composition, and the amount of dissolved gases it contains. As lava cools, it begins to congeal, and as viscosity increases, its mobility decreases.
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['A volcano is formed by eruptions of lava and ash.', 'Volcanoes are usually cone shaped mountains or hills.', "When magma reaches the Earth's surface it is called lava. ... ", 'Volcanic eruptions can happen at destructive and constructive boundaries , but not at conservative boundaries or collision zones .']
1069655
The characteristic of the volcano that depends on it's magma emission is it's shape...
219979
Volcanologists can predict eruptions—if they have a thorough understanding of a volcano's eruptive history, if they can install the proper instrumentation on a volcano well in advance of an eruption, and if they can continuously monitor and adequately interpret data coming from that equipment.
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To scientists, volcanoes are known as “constructive” forces. That is, volcanoes often result in the construction of new landforms. “Destructive” forces are those like erosion or weathering in which landforms are broken down into smaller pieces like soil and sand.
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Volcanoes are formed by eruptions of lava and ash when magma rises through cracks or weak-spots in the Earth's crust. A build up of pressure in the earth is released, by things such as a plate movement which forces molten rock to exploded into the air causing a volcanic eruption.
524425
Powerful volcanic eruptions will likely get more frequent in the future, scientists say. A recent paper found a link between glaciers and volcanism. As glaciers retreat because of climate change and other causes, volcanic activity tends to increase, according to the analysis.
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But scientists have found another force—climate change—affects the frequency of eruptions. Now a new study shows even relatively minor climate variations may have such an influence. If they are right, today's global warming could mean more and bigger volcanic eruptions in the future.
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"As with most natural disasters, this volcanic eruption will have direct and indirect costs. The initial cost is the loss of life and injury. The direct costs at this time are property damage to homes, cars, and infrastructure.
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['basic lava, which is non-acidic and very runny.', 'gentle sides as the lava flows for long distances before it solidifies.', 'no layers, as the volcano just consists of lava.', 'less violent eruptions.', 'shorter periods between eruptions.']
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The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity (how runny the magma is), volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano.
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Explosive volcanism. Part of Hall of Planet Earth. Most explosive eruptions occur in volcanoes above subduction zones, where one tectonic plate dives beneath the other. Eighty to 120 kilometers below the surface, magma forms when the rocks of the mantle melt just above the subducting plate.
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Image courtesy of USGS. There are two predominant types of volcanic eruptions: Effusive eruptions – magma rises through the surface and flows out of the volcano as a viscous liquid called lava. Explosive eruptions – magma is torn apart as it rises and reaches the surface in pieces known as pyroclasts.
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Volcano. A volcanic eruption indicates you are feeling out of control in life. If you think about the violent release of the lava, in dreams this can indicate that there are a hotspot in life creating hazards. ... The more lava and ash presented in a dream the more likely that this dream will become even more important.
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Volcanic eruptions can be extremely damaging to the environment, particularly because of a number of toxic gases possibly present in pyroclastic material. It typically consists mainly of water vapour, but it also contains carbon dioxide and sulphur dioxide gas.