
On this day in 1989, Redoubt eruption triggered seismic shift in Alaska volcano research
Redoubt on Dec. 18, 1989. (W.M. White/Alaska Volcano Observatory) When an ominous mushroom cloud of ash erupted from Mount Redoubt 31 years ago on Dec. 14, 1989, it was anyone’s guess how long the eruption would last. https://media.ktoo.org…