Aardvark Communications' Volcano Guide
Volcanoes in the USAThere are 1500 potentially active volcanoes on the Earth. Listed below are two places in the United States that are considered "active" volcanic areas.
Mount St. Helens
On May 18, 1980, after a long period of rest, Mount St. Helens a quiet mountain in Washington State provided detailed observations on the mechanics of highly explosive eruptions. The towering pine trees of this once-quiet mountain were toppled over like toysLong Valley
 - 1998.iso/practica/wwwaar~1.ca/volcano/pictures/seismo.jpg)
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This field seismometer measures earthquakes associated with subsurface volcanic forces and may help to predict future events. It sits on a plateau known as the "Volcanic Tableland" formed by a major eruption 600,000 years ago.
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