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Volcano - Wikipedia


A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava ... Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption. ...

What causes a volcano to erupt and how do scientists predict ...


When a part of the earth's upper mantle or lower crust melts, magma forms. A volcano is essentially an opening or a vent through which this magma and the ...

What causes volcanic eruptions? | Reference.com


Volcanic eruptions occur when magma builds up beneath the Earth's crust and forces its way to the surface. Natural vents in the crust allow magma passage to ...

What causes a volcano erupt?


A volcano begins as melted rock (magma) which rises from deep inside the earth toward the surface. As the gas-filled magma rises ...

Why are there volcanoes? Why do they erupt? | Volcano World ...


Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup).

What Causes Volcanoes? Why do Volcanoes Erupt? - WorldAtlas.com


Sep 19, 2016 ... A volcano is a geological feature of the earth where an opening allows magma to escape from the mantle of the planet.

Volcanic Eruptions: What Causes Volcanoes to Erupt - Buzzle


Aug 5, 2016 ... ... an enormous volcanic eruption. But, have you ever wondered what causes a volcano to erupt? If you have, this article has the answer for you.

www.ask.com/youtube?q=What Causes A Volcano Eruption&v=ShOFQ2h2fws
Jun 19, 2014 ... Volcanoes form when magma from the earth's interior is able to make its way to the surface, via a vent. This is usually associated with plate ...

Volcanic eruptions - IFRC


Volcanic eruptions happen when lava and gas are discharged from a volcanic vent ... Volcanic eruptions often cause temporary food shortages and volcanic ash ...

Volcanoes - Weather Wiz Kids weather information for kids


Eruptions can cause lateral blasts, lava flows, hot ash flows, mudslides, avalanches, falling ash and floods. Volcano eruptions have been known to knock down ...

Several factors trigger volcanic eruptions, including the buoyancy of magma, a build-up of pressure from the gases in the magma and an injection of new magma into a full magma chamber.
When a part of the earth's upper mantle or lower crust melts, magma forms. A volcano is essentially an opening or a vent through which this magma and the dissolved gases it contains are discharged.
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What Causes A Volcanic Eruption? | IFLScience


Jan 6, 2016 ... A team of volcanologists led by the University of Liverpool have released a perhaps controversial Nature study on the causes of volcanic ...

Volcanoes and volcanic eruptions - BBC


Volcanoes form when magma reaches the Earth's surface, causing eruptions of lava and ash. They occur at destructive (compressional) and constructive ...

What causes Volcanoes? - Geoscience Australia


Where plates move away from each other at spreading or divergent plate margins, volcanic eruptions are gentle extrusions of basaltic lava. Most of these occur ...