What Happens When A Volcano Erupts?

There are several different types of volcanic eruptions that are often named after famous volcanoes in which that particular type of behaviour has been observed. Volcanoes can generally exhibit any number of these characteristics during eruption or activity.

There are three different metatypes of eruptions: Magmatic eruptions, phreatomagmatic eruptions and phreatic eruption.

Magmatic eruptions has five subtypes, Hawaiian, Strombolin, Vulcanian, Pelean and Plinian. Most of these types do include some lava flow however the lava is a relatively smooth flow that can be billowy, this is known as pahoehoe lava. Some kinds of eruptions are characterised by short-lived and explosive eruptions of lavas with intermediate viscosity, often ejected high into the air. Columns can measure hundreds of meters in height.

Phreatomagmatic eruptions are eruptions that arise from interactions between water and magma. Because of the interaction with water volcanoes with these characteristics are known to spew heavy amounts of steam and ash, unless it is a submarine eruption in which case it'd be underwater.

Phreatic eruptions or steam-blast eruptions are a type driven by the expansion of steam. When cold ground or surface water come into contact with hot rock or magma it superheats and explodes, fracturing the surrounding rock and thrusting out a mixture of steam, water, ash, volcanic bombs, and volcanic blocks.

Volcanoes erupt in different ways. Some are quite quiet. Others are very forceful and send tons of stream, ash and rocks into the air. A Peleean volcano has the most powerful eruption. Glowing clouds of gas, steam and rock blast out of the volcano. The thick clouds drop down onto the volcano and race down its sides. These clouds are very dangerous to people and anyone caught in the flow faces almost certain death.

As magma bursts out of the top of the volcano, dust, gas, steam and hot rock shoot into the sky. Streams of magma called lava come to the surface and pour from the top of the volcano and down its sides. Sometimes the eruption is so loud it sounds like an explosion from a large bomb. Hot magma cools as it rises to the top. Some of it becomes solid on the way up. The solid pieces are blasted out in the eruption. The smaller pieces about the size of marbles are known as volcanic ash and the larger ones are called volcanic bombs. Volcanic bombs can be as big as and as heavy as trucks. The very small particles are called volcanic dust.

The magma leaves the magma chamber and passes through the pipe and the vent, finally, forcing its way though the crater and reaching the earth's surface. The magma (now known as lava) contain strong and toxic chemicals like sulfuric acid, that can burn several thousand people . The lava flows down the sides of the volcano, cooling and solidifying overtime, forming layers of ash and cinder along the cone.

Well, high pressure and high temperature forces the magma from under the earth, and this results in a volcanic eruption

Two tectonic plates touch under the ocean and it forces the magma up the volcano and into the air then causing an eruption to happen.

A volcano is a landform (usually a mountain) where (liquid rock) erupts through the surface of the planet.
In simple terms a volcano is a mountain that opens downward to a pool of molten rock (magma) below the surface of the earth. It is a hole in the Earth from which molten rock and gas erupt.

The Magma that has been stored in the magma chamber is lifted by tectonic plates and forced up into the pipe causing the magma to vent at the crater and let out a explosion of magma, gasses and other stuff

Every valcano is diffrent and it depends on the shape and location of valcanos but what usually happens is when lava bields up in the magma chamber it crates pressure witch causes the moutain to have a eruption and first there will be a earthquake then ash starts to shoot out along with rocks and then usually cemicall gases and fire then lava will start to flow and sometimes the water will turn to asied and if there are any hot springs then the bottom of the ground will start to come up with lava and excedra but and before a valcano erupts animals will go crazy such as running every where and barking and so on well I hope I ancerd some ones questions and remember valcano's are not only a destructive natural disaster but also a beautiful Creation : )

Lava pours and burns up islands!

Lava comes out
ashes blow up
it has more strength so it blows and kills many people

Lava comes out

As some people ask 'What Happen When A Volcano Erupts?'. Well most likely when a volcano erupts streams of lava which is also another known as magma, ash, rocks and gas are expelled from the mouth also known as the top of the volcano.Sometimes bad things such as gas clouds can kill are do harm to the human body sorry guys but this is the most that I can give rite now sorry I really hopes it gives part of your grades !!!

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When a volcano erupts ashes come out and magma starts to flow through.

Magma flows through and hardens and forms a volcano.

When a volcano erupts, lava builds up in the magma chamber, that creates the mountain to have an eruption ! :) xx

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When a volcano erupts ash gas and lava (molten rock or magma) spills out with a glowing colour which is red or white.

When a volcano erupts lava comes out of any kind of valcanos and then the lava turns into magma. When the lava comes out of the valcano the plants that are in on the valcano dies and the animals that lives by valcanos dies because the animals might live in an island I they have no where else to go and they die.

Poo comes out

Hey Thanks all of you This all helped me a lot!

What happens is all the ash and everything comes out.  There are many types of volcano's one of them is a dormant volcano.  You can think of this volcano as a quite volcano.  It does not explode often.