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When magma finds a way to escape from beneath the earth's surface, it creates a volcano. Some, like Mount St. Helens, explode. Explosive eruptions are so powerful, they can shoot particles 20 miles up (32 kilometers), hurl 8-ton boulders more than a half mile (0.8 kilometers) away, …
Imagine walking amid molten lava, deadly gases, and 2,000-degree heat on an active volcano. For more than 20 years, Maurice and Katia Krafft have traveled the world pursuing just such adventure.
Put simply, a volcano is an opening (usually in a mountain) in the Earth’s surface from which gas, hot magma and ash can escape. 2. The word “volcano” comes from the Roman name “Vulcan” – the Roman god of fire.
10/15/2008 · These rifts in the earth, spewing lava, gases and ash, are forces of nature that are both a blessing and curse for human civilization. See All National Geogr...

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