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Volcano

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 ...

Where do Volcanoes occur? - Geoscience Australia

www.ga.gov.au/scientific-topics/hazards/volcano/basics/where

Volcanoes can remain inactive, or dormant, for hundreds or thousands of years before erupting again. During this time they can become covered by vegetation ...

Where Does Volcanic Activity Occur? | Earth 520: Plate Tectonics ...

www.e-education.psu.edu/earth520/content/l6_p2.html

Volcanic activity occurs at two types of plate boundaries: mid-ocean ridges and subduction zones. At mid-ocean ridges, basaltic eruptions produce new sea-floor  ...

USGS FAQs - Volcanoes General - How Do Volcanoes Erupt?

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 ...

How often do volcanoes erupt? | Volcano World | Oregon State ...

volcano.oregonstate.edu/how-often-do-volcanoes-erupt

Eruptions. Well that depends on the volcano . Some volcanoes erupt very often ( and some like Kilauea almost never stop). On the other hand, some volcanoes ...

Do volcanoes occur in the ocean? - NOAA's National Ocean Service

oceanservice.noaa.gov/facts/volcanoes.html

Volcanic eruptions occur only in certain places and do not occur randomly. This is because the Earth's crust is broken into a series of slabs known as tectonic ...

Why do volcanoes erupt? What creates eruptions? - eSchooltoday

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 ...

10 Most Hazardous Countries For Volcanoes (Photos) - Live Science

www.livescience.com/50451-10-hazardous-countries-volcanoes.html

Apr 10, 2015 ... Here are the countries most at risk of a deadly volcanic eruption, according ... though the volcano did not erupt, according to historical accounts.

Volcanoes - Weather Wiz Kids weather information for kids

www.weatherwizkids.com/weather-volcano.htm

An extinct volcano is one which has erupted thousands of years ago and there's no possibility of eruption. Why do volcanoes erupt? The Earth's crust is made up  ...

How It Happens | Volcanic Eruptions - Video - NYTimes.com

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

Jan 5, 2015 ... 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.

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Where do most volcanoes occur? | Reference.com

www.reference.com

Most volcanoes occur in the basin of the Pacific Ocean, also known as the Ring of Fire. ... Why do earthquakes and volcanoes happen mostly in the same place? A: ... A composite cone volcano, or a stratovolcano, is built by multiple eruptions ...

How Do Volcanoes Erupt? - Universe Today

www.universetoday.com

May 26, 2016 ... Volcanic eruptions are driven by a combination of mechanisms, which include pressure and heat in the Earth's mantle, as well as tectonic ...

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

volcano.oregonstate.edu

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).