what are advantages and disadvantages of volcanic eruption?
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When a volcano erupts it throws out a lot of ash. At short notice this ash can be very harmful to the environment, but on the long term the ash layer, which contains many useful minerals, will be converted to a very fertile soil. Nearly everywhere volcanoes are located people use the rich soil for farming.
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Eruptions. Each type of volcano erupts as a result of the same basic process. ... These eruptions generally occur in the same locations because they involve the same plates. Volcanoes evolve when molten lava—magma above ground—cools, forming the basic volcano types.
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Major health threats from a volcanic eruption The most common cause of death from a volcano is suffocation. Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires.
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Volcanoes are dangerous. They can kill people and damage property. Economic activity can suffer as it is hard for businesses to operate after an eruption. Habitats and landscapes are damaged by lava flows.
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“It gives us really fertile soils, which are great for farming and crops.” Volcanoes also provide a good environment for the formation of new habitats for animals, plants and insects, she said. Hot springs and geothermal energy are additional benefits.
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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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Gaseous emissions from an erupting volcano can suffocate, poison, or induce health problems among humans and animals. ... Lastly, large amounts of volcanic ash repeatedly ejected into the atmosphere can disrupt the weather, reduce visibility, and cause harmful effects upon air travel.
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In general, eruptions can be categorized as either effusive or explosive. Effusive eruptions involve the outpouring of basaltic magma that is relatively low in viscosity and in gas content. Explosive eruptions generally involve magma that is more viscous and has a higher gas content.
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Three characteristics of magma that mainly affect the explosiveness of a volcanic eruption include gas content, viscosity, and temperature. ... A magma with higher viscosity means it has a lot of silica. As a result, the more silica a magma contains the thicker and more explosive it is.
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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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Volcanoes contribute to long-term global warming and short-term global cooling. When a volcano erupts, it spews ash and aerosol droplets into the atmosphere. ... As the sulfur dioxide is converted into sulfuric acid, it creates aerosol droplets, which further reflect the sun's rays away from Earth and contribute to cooling ...
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There 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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The molten rock contains a high proportion of water which, as superheated gas, provides the power for the explosive eruptions. In addition, the presence of the water lowers the melting temperature of the rock, which aids the transformation from solid rock to hot, liquid magma — a necessary ingredient for volcanoes.
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Viscosity, together with the amount of gas dissolved in magma, can determine the explosivity of the eruption. More viscous magma with volatiles is more explosive than less viscous magma, where gases can bubble out relatively easily.
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Would quiet eruptions or explosive eruptions be more likely to increase the height of a volcano? ... Quiet eruptions, because they usually build up layers of lava whereas explosive eruptions often blow up the top of a volcano, decreasing its height.
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When volcanoes erupt, they emit a mixture of gases and particles into the air. Some of them, such as ash and sulphur dioxide, have a cooling effect, because they (or the substances they cause) reflect sunlight away from the earth. Others, such as CO2, cause warming by adding to the the greenhouse effect.
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Definition: A volcanic eruption occurs when magma is released from a volcano. Volcanic eruptions can be quite calm and effusive, or they can be explosive. Effusive eruptions produce lava flows, while explosive eruptions produce ash and pyroclastic density currents. Volcanic Eruption.