This seismometer measures
earthquakesassociated with
subsurface volcanic forces.
Volcanic Places in the USA
Listed below are two places in the United States that are
considered "active" volcanic areas.
| Mount St. Helens | long Valley | |
| On may 18, 1980, after a long period of rest, this quiet mountain in Washingon provided detailed observations on the mechanics of highly explosive eruptions. | This field seismomeer measures earthquakes associated with sudsurface 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]--> This seismometer measures earthquakesassociated with subsurface volcanic forces. |
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