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When the magma gets close to the surface, the gases dissolved in it start to come out, forming gases which help the magma rise further and erupt. If there is a lot of gas in the magma, it may explode as the gases expand. There may also be triggers like a landslide that uncaps the magma reservoir (like at Mt. St. Helens in 1980) or an interaction with groundwater that causes an explosion.

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14y ago
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4mo ago

Before a volcano erupts, there are typically signs of increased seismic activity such as earthquakes, deformation of the volcano's surface, and gas emissions. This is often preceded by a build-up of magma beneath the surface, which creates pressure that eventually results in an eruption. Monitoring these signs allows scientists to issue warnings and evacuate nearby areas to prevent loss of life.

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15y ago

They first give off warning signs.

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The magma moves into this place that is called (here at least) a waiting chamber. Here, it gives off gasses, volcanos also cause quick earthquakes or vibrations.

Magma gathering in a chamber causes slight swelling of the volcano's slopes. Gases released near the volcano can be measured for changes or in quantity.

Hope you got all that ^_^

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15y ago

magma crawls from underground to an opening in the volcano

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Q: What happens before a volcano erupts?
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What happens as a volcano erupts?

destruction


What happens if a volcano never erupts?

dormant


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which are the following?


What hapens before a volcano erupts?

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What sign did the volcano give before it erupts?

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Tectonic plates.


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What happens when a volcano erupts from the cone?

Idk im kinda dumb......... Stuff just happens ok? So leave me alone poopface