Little Sitkin

Photo of this volcano
  • United States
  • Alaska
  • Stratovolcano
  • 1830 CE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 51.95°N
  • 178.543°E

  • 1174 m
    3851 ft

  • 311050
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 9 January-15 January 2013 Citation IconCite this Report


On 9 January, AVO reported that unrest at Little Sitkin had decreased over the past several months, reaching background levels. The Volcano Alert Level was lowered to Normal and the Aviation Color Code was lowered to Green.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Weekly Reports - Index


2013: January
2012: August | September | October


9 January-15 January 2013 Citation IconCite this Report


On 9 January, AVO reported that unrest at Little Sitkin had decreased over the past several months, reaching background levels. The Volcano Alert Level was lowered to Normal and the Aviation Color Code was lowered to Green.

Source: US Geological Survey Alaska Volcano Observatory (AVO)


17 October-23 October 2012 Citation IconCite this Report


AVO reported that during 17-23 October seismic activity at Little Sitkin remained elevated and satellite views were mostly obscured by clouds. AVO noted that there were no other reports of unusual activity. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.

Source: US Geological Survey Alaska Volcano Observatory (AVO)


19 September-25 September 2012 Citation IconCite this Report


AVO reported that during 19-24 September seismic activity at Little Sitkin remained elevated and satellite views were mostly obscured by clouds. On 21 September AVO noted that the frequency of earthquakes had declined during the previous week. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.

Source: US Geological Survey Alaska Volcano Observatory (AVO)


12 September-18 September 2012 Citation IconCite this Report


AVO reported that during 11-18 September seismic activity at Little Sitkin remained elevated and satellite views were obscured by clouds. Two earthquake swarms were detected on 11 and 13 September. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.

Source: US Geological Survey Alaska Volcano Observatory (AVO)


5 September-11 September 2012 Citation IconCite this Report


AVO reported that during 5-11 September seismic activity at Little Sitkin was much lower than the peak of activity during 29-30 August, but continued to remain elevated. Satellite views were obscured by clouds during 5 and 8-11 September. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.

Source: US Geological Survey Alaska Volcano Observatory (AVO)


29 August-4 September 2012 Citation IconCite this Report


AVO reported that at approximately 1915 on 29 August a swarm of high-frequency earthquakes was detected at Little Sitkin. The anomalous seismic activity continued through the night, prompting AVO to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. The rate of anomalous seismicity varied during 30-31 August; the two most active periods were during the morning of 30 August and at about 0400 on 31 August. The rate of earthquakes started to decline at around 0600 on 31 August, but remained elevated through 3 September. Little Sitkin is monitored by a four-station seismic network as well as satellite imagery.

Source: US Geological Survey Alaska Volcano Observatory (AVO)


The Global Volcanism Program has no Bulletin Reports available for Little Sitkin.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History


Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1828 1830 Confirmed   Historical Observations Summit and west flank
1776 Unknown Confirmed 1 Historical Observations

Deformation History


Information about Deformation periods will be available soon.

Emission History


There is no Emissions History data is available for Little Sitkin.

Photo Gallery


Snow-covered Little Sitkin volcano rises beyond Williwaw Cove on the NW side of the island. The sharp-topped unnamed peak at the left is part of the Williwaw Cove Formation, consisting of Tertiary to Quaternary lava flows. Two nested calderas lie between this peak and historically active Little Sitkin; the younger of these may be of early Holocene age. The older Pleistocene caldera, whose low rim lies just beyond the thin cloud bank in the center, may have once contained a caldera lake.

Photo by Steve Ebbert, 2000 (U.S. Fish and Wildlife Service).
See title for photo information.

Smithsonian Sample Collections Database


The following 5 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.

Catalog Number Sample Description Lava Source Collection Date
NMNH 118208-1 Scoriaceous tephra -- 9 Sep 2015
NMNH 118208-2 Scoriaceous tephra -- 9 Sep 2015
NMNH 118208-3 Basaltic Andesite -- 9 Sep 2015
NMNH 118208-4 Scoriaceous tephra -- 9 Sep 2015
NMNH 118208-5 Scoriaceous tephra -- 9 Sep 2015

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