Hot avalanches down the steep north flank of Redoubt during the 1989-90 eruptions mixed with water derived from melted snow and ice to form lahars. These sediment-rich floods carried steaming debris many kilometers down the Drift River Valley. The top of the gray area marks the high-water line of the lahar that contrasts with the snow-covered slopes above it. Note the helicopter for scale.

Photo by Tom Miller, 1990 (Alaska Volcano Observatory, U.S. Geological Survey).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Fieldwork | Lahars

Keywords: lahar | deposit | field work | volcanologist

Redoubt