▁used ▁the ▁following ▁color - coded ▁system ▁to ▁rate ▁vol can ic ▁activity . ▁ ▁It ▁was ▁originally ▁established ▁during ▁the ▁ 1 9 8 9 - 9 0 ▁er u ption ▁of ▁Red ou bt ▁Vol cano . ▁ ▁All ▁five ▁class ifications ▁are ▁sp elled ▁as ▁proper ▁n oun s , ▁i . e ., ▁Level ▁of ▁Conc ern ▁Color ▁Code ▁Orange ▁not ▁Level ▁of ▁concern ▁color ▁code ▁Orange ▁or ▁any ▁other ▁variation . ▁ ▁On ▁its ▁website ▁the ▁AV O ▁sp ells ▁the ▁alert ▁color ▁in ▁all ▁capit als , ▁but ▁this ▁is ▁not ▁otherwise ▁necessary ▁outside ▁their ▁system . ▁ ▁Warning ▁system ▁for ▁Cas cade ▁Range ▁vol cano es ▁in ▁Washington ▁and ▁Oregon ▁Int rodu ced ▁following ▁the ▁May ▁ 1 8 , ▁ 1 9 8 0 , ▁er u ption ▁of ▁Mount ▁St . ▁Hel ens . ▁ ▁References ▁US GS ▁Vol can ic ▁Activity ▁Alert - Notification ▁System ▁page ▁AV O ▁information ▁release ▁about ▁new ▁warning ▁scheme ▁ ▁Category : Vol can ology ▁Category : Warning ▁systems ▁Category : Color ▁codes <0x0A> </s> ▁D ren ge ▁is ▁the ▁self - t itled ▁debut ▁album ▁by ▁British ▁band ▁D ren ge . ▁It ▁was ▁released ▁on ▁ 1 9 ▁August ▁ 2 0 1 3 ▁on ▁In fect ious ▁Music . ▁The ▁album ▁reached ▁# 3 9 ▁on ▁the ▁i T unes ▁charts ▁upon ▁its ▁release . ▁ ▁The ▁album ▁received ▁mostly ▁positive ▁reviews ▁with ▁Cl ash ▁Music ▁describing ▁the ▁album ' s ▁use ▁of ▁a ▁"