Web Results
How Volcanoes Work
How Volcanoes Work
Whenever there is a major volcanic eruption in the world, you'll see a slew of newspaper articles and nightly news stories covering the catastrophe, all stressing... More »
Source: www.howstuffworks.com

en.wikipedia.org/wiki/Volcano

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 .... Like stratovolcanoes, they can produce violent, explosive eruptions, but their lava generally does not flow far from the originating vent.

simple.wikipedia.org/wiki/Volcanic_eruption

Eruptions can come from side branches or from the top of the volcano. Some eruptions are terrible explosions that throw out huge amounts of rock and ash and ...

www.universetoday.com/31124/how-volcanoes-erupt

May 4, 2017 ... Volcanoes come in many shapes and sizes, ranging from common cinder cone volcanoes that build up from repeated eruptions and lava ...

www2.usgs.gov/faq/categories/9819/2729

Some volcanic eruptions are explosive and other are not. How explosive an eruption is depends on how runny or sticky the magma is. If magma is thin and ...

volcano.oregonstate.edu/why-are-there-volcanoes

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).

eschooltoday.com/volcanoes/how-do-volcanoes-erupt.html

Find out what the earth make-up is, and how extreme pressure build up inside the earth forces molten matter to be expelled out to the surface, causing a volcanic ...

www.nytimes.com/video/science/100000003431211/how-it-happens-volcanic-eruptions.html

Jan 5, 2015 ... Understand the science behind the headlines in How It Happens, which combines simple explanation and elegant animation to reveal the ...

www.scientificamerican.com/article/what-causes-a-volcano-to

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 ...

.ask.com/youtube?q=How+Do+Volcano+Erupt&v=Qq7u1lw7038
Feb 25, 2009 ... United States Geological Survey podcast that answers the question, "How to volcanoes erupt?" NOTE: In no way does USGS endorse this ...