November 18, 2009
Want to stay on top of all the space news? Follow @universetoday on Twitter By understanding how a volcano erupts, volcanologists have gained a deeper understanding of the various stages in the eruption process. This has subsequently allowed them to determine whether a particular volcano activity has already reached critical levels, i.e., time for evacuation. [...]
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April 22, 2009
There are several different kinds of lava, depending on the chemical composition and temperature of the molten rock that erupts from a volcano. The smooth variety is called pahoehoe, and the rougher variety is known as a’a (pronounced ah-ah). A’a is a Hawaiian word meaning “stony with rough lava”. If you’ve ever been to the [...]
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