Yunaska

Photo of this volcano
  • United States
  • Alaska
  • Shield
  • 1937 CE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 52.643°N
  • 170.629°W

  • 550 m
    1804 ft

  • 311210
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Yunaska.

The Global Volcanism Program has no Weekly Reports available for Yunaska.

The Global Volcanism Program has no Bulletin Reports available for Yunaska.

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


There is data available for 6 Holocene eruptive periods.


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1937 Nov 3 1937 Nov 4 Confirmed 3 Historical Observations
[ 1929 ] [ Unknown ] Uncertain    
[ 1873 ] [ Unknown ] Uncertain 2  
1830 Unknown Confirmed 2 Historical Observations
1824 Unknown Confirmed 3 Historical Observations
[ 1817 ] [ Unknown ] Uncertain    

Deformation History


There is data available for 1 deformation periods. Expand each entry for additional details.


Deformation during 2004 - 2009 [Subsidence; Observed by InSAR]

Start Date: 2004 Stop Date: 2009 Direction: Subsidence Method: InSAR
Magnitude: Unknown Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Subsidence on the north flank due to contraction of 1937 lava flow.

Averaged deformation images of Yunaska Island produced by stacking all available InSAR images from 2004?2009 from the following tracks: a track 036 (ascending), b track 158 (descending), c track 265 (ascending), and d track 430 (descending). Dashed line delineates subsiding area on the north flank of Yunaska volcano extending from nearly the rim of Caldera II to the north shore. A full cycle of colors (i.e., one interferometric fringe) represents 28 mm/year of surface displacement along the LOS

From: Lu and Dzurisin 2014.


Reference List: Lu and Dzurisin 2014.

Full References:

Lubis, A. M., 2014. Uplift of Kelud Volcano Prior to the November 2007 Eruption as Observed by L-Band Insar. Journal of Engineering and Technological Sciences, 46(3), 245-257.

Emission History


There is no Emissions History data available for Yunaska.

Photo Gallery


The rim of the summit caldera of Yunaska volcano is seen from an older volcanic center on the western side of the island. The younger, 550-m-high eastern complex consists of a shield volcano capped by two nested calderas and is presumably the source of the island's historical eruptions, first recorded in 1817. A young lava flow at the far right descended through a notch in the caldera rim. In the background are the snow-capped peaks (left-to-right) of Carlisle, Cleveland, and Herbert volcanoes.

Photo by Jim Meyers, 1992 (University of Wyoming, courtesy of Alaska Volcano Observatory).
See title for photo information.

Smithsonian Sample Collections Database


There are no samples for Yunaska in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites