Volcano Warning Schemes Article Index for
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Volcano Warning Schemes




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COLOR-CODE CONDITIONS, LONG VALLEY CALDERA AND MONO-INYO CRATERS REGION, CALIFORNIA

Developed in 1997 to replace a previous 5-level system devised in 1991 .


LEVEL OF CONCERN COLOR CODES FOR VOLCANOES IN ALASKA

Established during the 1989 - 90 eruption of Redoubt Volcano .


WARNING SYSTEM FOR CASCADE RANGE VOLCANOES IN WASHINGTON AND OREGON

Introduced following the May 18 , 1980 , Eruption of Mount St. Helens .


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