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Volcano warning
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Volcano warning schemes of the United States
USGS Volcano Warning Scheme for the United States
The
United States Geological Survey
(USGS) has adopted as of October 2006 a common system nationwide for characterizing the level of unrest and eruptive activity at volcanoes. The new volcano alert-level system is now used by the
Alaska Volcano Observatory
, the
Cascades Volcano Observatory
, the
Hawaiian Volcano Observatory
, the
Long Valley Observatory
, and the
Yellowstone Volcano Observatory
.
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