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USGS/Cascades Volcano Observatory, Vancouver, Washington

Volcano and Hydrologic Hazards


More than 50 volcanoes in the United States have erupted one or more times in the past 200 years. The most volcanically active regions of the Nation are in Alaska, Hawaii, California, Oregon, and Washington. Volcanoes produce a wide variety of hazards that can kill people and destroy property. Large explosive eruptions can endanger people and property hundreds of miles away and even affect global climate. Some of the volcano hazards, such as landslides, can occur even when a volcano is not erupting. -- Myers, et.al., 1997


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09/29/04, Lyn Topinka