Earlier_volcano_warning_schemes_for_the_United_States Volcano_warning_schemes_of_the_United_States

1 earlier volcano warning schemes united states

1.1 color code conditions, long valley caldera , mono-inyo craters region, california
1.2 level of concern color codes volcanoes in alaska
1.3 warning system cascade range volcanoes in washington , oregon

earlier volcano warning schemes united states

prior october 2006, 3 parallel volcano warning schemes used united states geological survey , volcano observatories different volcano ranges in united states. each have base level dormant-quiescent states , 3 grades of alert.

color code conditions, long valley caldera , mono-inyo craters region, california

developed in 1997 replace previous 5-level system devised in 1991.

level of concern color codes volcanoes in alaska

the alaska volcano observatory (avo) used following color-coded system rate volcanic activity. established during 1989-90 eruption of redoubt volcano.

all 5 classifications spelled proper nouns, i.e., level of concern color code orange not level of concern color code orange or other variation. on website avo spells alert color in capitals, not otherwise necessary outside system.

warning system cascade range volcanoes in washington , oregon

introduced following may 18, 1980, eruption of mount st. helens.