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What happens when a volcano erupts - Edu4Hazards


An eruption begins when pressure on a magma chamber forces magma up through the conduit ... Volcanic activity is classified by how often a volcano erupts .

What happens during an volcanic eruption


Volcanic hazards and prediction. What happens during an volcanic eruption: Types of volcanic eruptions are quite varied, dependent on the type of magma, the ...

Volcano Eruption - Earth Facts and Information


Volcanic eruptions happen deep down inside the earth. When the earth's tectonic plate's shift, it causes more than just earthquakes, it can create new volcanoes ...

Volcanoes - Weather Wiz Kids weather information for kids


The friction causes earthquakes and volcanic eruptions near the edges of the plates. The theory that ... When this happens, it commonly results in earthquakes.

Volcanic eruptions - IFRC


Volcanic eruptions happen when lava and gas are discharged from a volcanic vent. The most common consequences of this are population movements as large ...

What Happens Before a Volcano Blows? | Science | Smithsonian


Feb 7, 2012 ... A caldera is a very large crater that forms after a very large volcanic eruption. The eruption is explosive and ejects a lot of material. Most of what ...

How Volcanoes Erupt - Universe Today


May 20, 2009 ... To understand how volcanoes erupt, you have to consider the structure of the Earth. ... This is what happened with Mount St. Helens in 1980.

What causes a volcano erupt?


Most volcanic materials erupt through the central vent. However, some magma may break through the main conduit wall and branch out into smaller channels ...

Volcanic Eruptions | Scholastic.com


About 50 to 60 eruptions happen each month. Some volcanoes are in constant activity — Stromboli, Kilauea, or Sakurajima, for example. There are many ...

What Happens When The World's Largest Volcano Erupts Again?


May 20, 2014 ... Of the five active volcanoes in Hawaii, only the Kilauea and Loihi volcanoes have been quietly erupting consistently for decades. But Mauna ...

When a volcano erupts, hot magma (molten rock), gases and volcanic ash are emitted. The explosiveness of the eruption depends on the consistency of the magma and the amount of pressure built up prior to eruption.
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How It Happens | Volcanic Eruptions - Video - NYTimes.com


The eruption of a volcano can be one of the planet's most destructive events — spewing huge amounts of rock, gas and ash that can kill people. Henry Fountain  ...

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 will happen when the eruption ends?


Nov 3, 2000 ... Earthquakes · Other Volcanoes. Volcanic Hazards ... In fact, this could even happen before the Pu`u `O`o eruption ends. Many people believe ...