Photograph by T. Miller, U.S. Geological Survey, January 5, 1990. This aerial view, looking southwest, shows the 1.9 billion-barrel capacity oil storage tanks. Redoubt Volcano is on the skyline at left. Photograph by R. McGimsey, U.S. Geological Survey, April 13, 1990. Photograph by T. Miller, U.S. Geological Survey, February 15, 1990.
Geologists view an unusual flowing mixture of water and ice in the upper Drift River.
The flow was produced by a sudden release of impounded water from the upper reaches of the Drift River canyon which drains the summit crater of Redoubt Volcano. Photograph by R. McGimsey, U.S. Geological Survey, March 15, 1990. Photograph by C. Gardner, U.S. Geological Survey, June 1, 1990. Photograph by R. McGimsey, U.S. Geological Survey, June 15, 1990. Aerial view, looking southwest, of the Drift River valley following the 1989 to 1990 eruptions of Redoubt Volcano.