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Augustine volcano (Alaska) - eruption update: increased volcanic alert level
Thursday, Sep 27, 2007
AVO increased the Volcanic Alert Level to Advisory and the Aviation
Color Code to Yellow for Augustine on 22 September due to an increase
... [more]
Augustine volcano (Alaska) - eruption update: low activity
Thursday, Aug 17, 2006

AVO reduced the Concern Color Code at Augustine from Yellow to Green on 9 August. Seismic, satellite, and visual data indicated a de... [more]

Map of Augustine volcano, surrounding volcanoes, and surrounding communities. (Image courtesy Schaefer, Janet, Alaska Division of Geological & Geophysical Surveys.)
Map of Augustine volcano, surrounding volcanoes, and surrounding communities. (Image courtesy Schaefer, Janet, Alaska Division of Geological & Geophysical Surveys.)
Photograph of Augustine's summit and the steaming lava dome, taken on 4 January, 2006 (Photo: USGS)
Photograph of Augustine's summit and the steaming lava dome, taken on 4 January, 2006 (Photo: USGS)

Augustine volcano

stratovolcano 1252 m
Cook Inlet (SW Alaska), 59.36°N / -153.43°W
Current status: dormant (1 out of 5)
Augustine webcams / live data
Typical eruption style: Explosive
Augustine volcano eruptions: 1812, 1883-84(?), 1908(?), 1935, 1963, 1971, 1976, 1986
Augustine is the most active volcano of the eastern Aleutian arc. It consists of several overlapping lava domes that frequently produce explosive eruptions and are notorious for collapsing, producing glowing avalanches (block and ash flows).
Augustine volcano had a devastating eruption 1883 when large parts of the summit dome complex collapsed. In the following century, several eruptions associated with dome growth have restored the volcano's height again. Historical eruptions after that date were typically explosive, producing pyroclastic pumice flows and block-and-ash flows, followed by regrowth of the lava domes.

Background:

The oldest exposed rocks on the flanks of Augustine are little more than 40,000 years old. At least 11 large debris avalanches have reached the sea during the past 1800-2000 years, and five major pumiceous tephras have been erupted during this interval.