On this day in 1989, Redoubt eruption triggered seismic shift in Alaska volcano research

Redoubt Volcano: The early part of the 1989-90 eruption was characterized by explosive events and widespread flooding of the Drift River valley. Hot volcanic debris interacted with snow and ice to form fast-moving slurries of water, mud, rocks, and sand. These flows, called lahars, completely inundated the Drift River valley downstream from Redoubt several times during the 1989-90 eruptions. Such flows posed a hazard to the Drift River Oil Terminal, located 35 km east of Redoubt near the mouth o

Beechcraft Bonanza airplane wingtip flies over Lake Clark Pass in Alaska. Mount Redoubt in the background. Small aircraft are only way to see many areas of Alaska.

Beechcraft Bonanza airplane wingtip flies over Lake Clark Pass in Alaska. Mount Redoubt in the background. Small aircraft are only way to see many areas of Alaska.

Beechcraft Bonanza airplane wingtip flies over Lake Clark Pass in Alaska. Mount Redoubt in the background. Small aircraft are only way to see many areas of Alaska.