Photo of this volcano
  • United States
  • Alaska
  • Stratovolcano
  • 1830 CE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 54.65°N
  • 164.43°W

  • 1112 m
    3647 ft

  • 311350
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Fisher.

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

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

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
1830 Aug Unknown Confirmed 2 Historical Observations Mount Finch
1826 Oct 11 1827 Jan (?) Confirmed 3 Historical Observations Mount Finch
1795 (in or before) Unknown Confirmed   Historical Observations
0400 ± 50 years Unknown Confirmed   Radiocarbon (uncorrected) Turquoise cone
3170 BCE ± 75 years Unknown Confirmed 5 Radiocarbon (uncorrected) Turquoise cone
7420 BCE ± 200 years Unknown Confirmed 6 Radiocarbon (uncorrected) NE and SW parts of Fisher caldera

Deformation History

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

Deformation during 1992 - 2010 [Subsidence; Observed by InSAR]

Start Date: 1992 Stop Date: 2010 Direction: Subsidence Method: InSAR
Magnitude: Unknown Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Fisher Caldera has been subsiding persistently.

Figure (see Caption)

Velocity maps from (a) PSI and (b) SBAS processing, respectively.

From: Gong et al. 2015.

Reference List: Lu and Dzurisin 2014; Mann and Freymueller 2003; Gong et al. 2015.

Full References:

Gong, W., Meyer, F. J., Lee, C. W., Lu, Z., & Freymueller, J., 2015. Measurement and interpretation of subtle deformation signals at Unimak Island from 2003 to 2010 using weather model- assisted time series InSAR. J. Geophys. Res., 120(2), 1175-1194.

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.

Mann D, Freymueller J, 2003. Volcanic and tectonic deformation on Unimak Island in the Aleutian Arc, Alaska. J. Geophys. Res., 108(B2), 2108.

Emission History

There is no Emissions History data available for Fisher.

Photo Gallery

This 1974 view shows part of the interior of Fisher caldera on Unimak Island in the eastern Aleutian Islands. Fisher is an 11 x 18 km caldera that formed about 9100 years ago during the eruption of compositionally zoned ash flows that overtopped topographic barriers more than 500 m in elevation. The caldera contains two large lakes and a smaller lake that drains through a notch in the south caldera rim. There has been one poorly documented historical eruption from Fisher in 1826.

Photo by Tom Miller, 1974 (U.S. Geological Survey).
See title for photo information.

Smithsonian Sample Collections Database

The following 11 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 117233-174 Pumice -- --
NMNH 117233-175 Pumice -- --
NMNH 117233-176 Pumice -- --
NMNH 117233-177 Volcanic Bomb -- --
NMNH 117233-178 Tuff -- --
NMNH 117233-179 Pumice -- --
NMNH 117233-181 Pumice -- --
NMNH 117233-182 Glass -- --
NMNH 117233-185 Pumice -- --
NMNH 117233-186 Obsidian -- --
NMNH 117233-187 Obsidian -- --

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