[Image,270K,GIF]
View south of Redoubt volcano, Alaska on 7 April 1990. Hot
pyroclastic flows during eruptions between December 1989
and June 1990 melted most of upper Drift glacier.
Resulting floods threatened an oil storage-and-loading
facility at the valley mouth. Debris of the pyroclastic
flows thickly mantled the piedmont lobe of the Drift
glacier (in foreground).
[Image,230K,GIF]
View northwest of Redoubt volcano, Alaska, on 4 March
1990. Steam commonly vents from the dome in the crater in
between eruptions.
[Image,305K,GIF]
View west of Redoubt volcano on 10 April 1990. Drift
glacier occupies the valley extending from the vent (at
steam plume) to the valley bottom (visible in lower
right).
[Image,275K,GIF]
View southwest down Crescent glacier on south flank of Mt.
Redoubt volcano in August 1990. A hot pyroclastic surge
during the eruption of 15 December 1989 caused thick
snowpack near on the upper volcano flank to avalanche and
partly melt. The glacier in the right middleground is
blanketed (dark material at surface) by an an unusual ice
diamict emplaced during the eruption.
