See the animation of events for this volcanic eruption
[194k GIF Animation].
Volcanic Places in the USA
Listed below are places in the United States that are considered "active" volcanic areas.
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Mount St Helens | Long Vally | |
|
On May 18, 1980, after a long period of rest, this quiet
mountain in Washington provided
toppled over like toothpicks
|
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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| -- [full size image] -- | ||
| San Francisco Peaks | MacDougal Crater | |
| Scientists believe that the volcanic eruptions several million years ago that shaped this mountain in northern Arizona were very similar to the ones observed at Mount St. Helens. | When hot volcanic magma encounters ground water, these explosive eruptions can form deep craters seen just south of Arizona in the Pincate Volcanic region of Mexico. | |
