mount active largely volcanic state alaska located head lake clark national park preserve mountain west cook inlet borough southwest anchorage feet miles feet prominence surrounding terrain highest summit active erupted times observed questionable eruption volcanic ash height caught flight boeing aircraft plane descended feet pilots restarted engines landed plane safely anchorage ash area km2 eruption notable volcanic eruption successfully predicted method long period seismic events developed swiss american august rated aviation alert level green official mountain translation russian referring word fortified place local means fortified place difficult determine derived decided refers mountain simply lists following alternate names burnt mountain uses simply lists alternate names addition following geology volcano miles diameter base rough volume sides upper cone relatively steep comparison general flow deposits lava flows resting era rocks mountain somewhat movement glaciers reside current main vent north crater head drift present mountain deposits extend far mountain produced relatively dominant recent early reports captain saw summer describing white smoke fire think white thick cloud frequently seen coast appearing sides hills extends range different times falls rises expands contracts resemblance clouds white smoke small clouds remained fixed spot time mountain clear hours sources eruption activities called smoke observed mountain recorded eruption information insufficient identify similarly blowing cloud snow mistaken employee building anchorage ash possible steam let observed mountain apparently eruption described eastward feet high constantly smoking periods exaggerated activity fire seen issuing summit far sea great eruption took place party native hunters half way slopes overwhelmed lava flow escaped eruption documented sources volcano erupted abruptly ash january june year local newspaper stated word received cook inlet eruption january country miles covered ashes lava news comes sunrise definite damage boats neighborhood volcano news reports eruption describing eruption terrific earthquake burst mountain leaving large gap possibly suggest crack formation volcano crater unlikely supposedly volcano flames eruption terrified natives area newspapers suggest ash traveled miles reaching opposite volcano erupted december continued months sudden melting snow ice summit caused flows dome collapses caused flowed north flank mountain majority miles volcano entered nearby river worrying officials destroy oil storage facility located produced repeatedly scientists realized use analyze trial period newly developed device proposed measure movement rocks device known acoustic flow monitor nearby stations possible eruption caused engines fail boeing jet operated flew cloud volcanic ash damage eruption estimated million second volcanic eruption united_states history pre eruption january scientists warned eruption imminent sending experienced shopping protection dusty shower volcanic ash descend south central alaska january volcanic earthquakes increased hour large hole mountain spotted scientists began monitor seismic data mountain hours day effort warn people nearby communities conducted detected significant steaming new melt depression mouth summit crater near vent area eruption march seismic activity increased beginning observation flight reported steam ash rose high feet sea level produced minor ash fall upper south flank later reports mainly steam basis change activity increased level concern alert level orange watch emissions material ejected volcano mainly consisted water smaller amounts carbon dioxide dioxide study airborne monitors suggests materials little concentration contained large scale begin erupted late evening march recorded numerous volcanic explosions volcano
Mount Redoubt