BackgroundGlacier Peak forms a prominent peak in the rugged forested terrain of the Glacier Peak Wilderness Area in the North Cascades. Glacier Peak is a dacitic-andesitic stratovolcano with summit and flank lava domes; it resembles Mount St. Helens in its explosive vigor.
Several major explosive eruptions and episodes of lava dome growth occurred in the past 10,000 years. Ash deposits from these eruptions are found over wide distances to the east. Voluminous pyroclastic flow and mudflow deposits extend into the Puget Sound lowlands to the west. Some of these deposits diverted river courses into adjacent valleys.
The latest eruption of Glacier Peak was only a few hundred years ago and was noted by Pacific Northwest Indians. Hot springs are found on its flanks.
See also: Sentinel hub | Landsat 8 | NASA FIRMS