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Ugashik-Peulik

Photo of this volcano
  • United States
  • Alaska
  • Stratovolcano
  • 1814 CE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 57.751°N
  • 156.368°W

  • 1474 m
    4835 ft

  • 312130
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Ugashik-Peulik.

The Global Volcanism Program has no Weekly Reports available for Ugashik-Peulik.

The Global Volcanism Program has no Bulletin Reports available for Ugashik-Peulik.

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 5 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1852 ] [ Unknown ] Uncertain     Peulik
1814 Unknown Confirmed 3 Historical Observations Peulik
1050 ± 100 years Unknown Confirmed   Radiocarbon (uncorrected) Peulik
5850 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected) Peulik
6550 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected) Peulik
Deformation History

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


Deformation during 1996 - 1998 [Uplift; Observed by InSAR]

Start Date: 1996 Stop Date: 1998 Direction: Uplift Method: InSAR
Magnitude: 20.000 cm Spatial Extent: Unknown Latitude: Unknown Longitude: Unknown

Remarks: Uplift event preceded the 1998 Becharof Lake earthquake swarm.

Figure (see Caption)

(Top row) Examples of observed and (bottom row) best-fit synthetic ERS interferograms of Ugashik-Mount Peulik volcanic center. Dates of image acquisitions are in yyyymmdd format: a 19960903_9970715 (track 315) b 19961018_19970923 (track 315) c 19970923_19980804 (track 315), and d 19950725_19980819 (track 021). Synthetic interferograms were produced using a Mogi (1958) source about 7 km BSL and beneath the center of Ugashik caldera. Areas lacking interferometric coherence are uncolored. A full cycle of colors (i.e., one interferometric fringe) represents 28 mm LOS surface displacement

From: Lu and Dzurisin 2014.


Reference List: Lu and Dzurisin 2014, Lu et al. 2002.

Full References:

Lu, Z., T. Masterlark, J. Power, D. Dzurisin, and C. Wicks,, 2002. Subsidence at Kiska volcano, Western Aleutians, Detected by Satellite Radar Interferometry. Geophysical Research Letters, 29, no. 18, 1855. https://doi.org/10.1029/2002GL014948

Emission History

There is no Emissions History data available for Ugashik-Peulik.

Photo Gallery

Mount Peulik is a 1474-m stratovolcano that was constructed immediately north of Ugashik caldera. It is seen here from NW near Ukinrek Maars. The hummocky terrain in the middle distance is a debris-avalanche deposit produced by collapse of ancestral Peulik volcano. Only one historical eruption, in 1814, is known from Peulik.

Photo by Christina Neal, 1993 (Alaska Volcano Observatory, U.S. Geological Survey).
See title for photo information.
The 4.5-km-wide Ugashik caldera was formed during the late Pleistocene. Five unglaciated Holocene lava domes occupy the caldera, seen here from the east with Upper Ugashik Lake in the background. The small Peulik stratovolcano was constructed immediately north of the caldera, out of view to the right, and partially overtops the caldera rim. Puelik has a summit crater that is breached to the west and contains a dacitic lava dome.

Photo by Betsy Yount (Alaska Volcano Observatory, U.S. Geological Survey).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.

Title: Canada, United States
Publisher: DMA Aerospace Center
Country: United States, Canada
Year: 1989
Series: ONC
Map Type: Topographic
Scale: 1:1,000,000
Map of Canada, United States
Title: Quat Geol, Ugashik, Bristol Bay, & W Karluk Quads
Publisher: US Geological Survey
Country: United States
Year: 1987
Series: MI
Map Type: Geology
Scale: 1:250,000
Map of Quat Geol, Ugashik, Bristol Bay, & W Karluk Quads
Title: Kodiak
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1987
Series: Sectional Aero Chart
Map Type: Topographic
Scale: 1:500,000
Map of Kodiak
Title: Mt Katmai & Portions of Afognak, Naknek Quads, Geo
Publisher: US Geological Survey
Country: United States
Year: 1987
Series: OFR
Map Type: Geology
Scale: 1:250,000
Map of Mt Katmai & Portions of Afognak, Naknek Quads, Geo
Title: Ugashik, AK Peninsula
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1986
Map Type: Bathymetric
Scale: 1:250,000
Map of Ugashik, AK Peninsula
Title: Map Showing Distribution, Composition, and Age of Late Cenozoic Volcanic Craters in Alaska
Publisher: US Geological Survey
Country: United States
Year: 1986
Series: Misc Investigations
Map Type: Geology
Scale: 1:1,000,000
Map of Map Showing Distribution, Composition, and Age of Late Cenozoic Volcanic Craters in Alaska
Title: Map Showing Distribution, Composition, and Age of Late Cenozoic Volcanic Craters in Alaska
Publisher: US Geological Survey
Country: United States
Year: 1986
Series: Misc Investigations
Map Type: Geology
Scale: 1:1,000,000
Map of Map Showing Distribution, Composition, and Age of Late Cenozoic Volcanic Craters in Alaska
Title: N Aleutian Basin, Gulf of AK
Publisher: USDI Minerals Management Service
Country: United States
Year: 1984
Series: OCSRM maps
Map Type: Bathymetric
Scale: 1:1,000,000
Map of N Aleutian Basin, Gulf of AK
Title: Mt Katmai, Shelikof Strait
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1983
Map Type: Bathymetric
Scale: 1:250,000
Map of Mt Katmai, Shelikof Strait
Title: Karluk, Shelikof Strait
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1983
Map Type: Bathymetric
Scale: 1:250,000
Map of Karluk, Shelikof Strait
Title: Mt Katmai (A-6)
Publisher: US Geological Survey
Country: United States
Year: 1982
Series: 63,360 Topo
Map Type: Topographic
Scale: 1:63,360
Map of Mt Katmai (A-6)
Title: Naknek
Publisher: US Geological Survey
Country: United States
Year: 1981
Series: AK Topo 250
Map Type: Topographic
Scale: 1:250,000
Map of Naknek
Title: (1) XSect AK Peninsula-Kodiak-Aleutian Trench
Publisher: GSA
Country: United States
Year: 1979
Series: MC
Map Type: Geology (Cross-Section)
Scale: 1:1,000,000
Map of (1) XSect AK Peninsula-Kodiak-Aleutian Trench
Title: (2) XSect AK Peninsula-Kodiak-Aleutian Trench
Publisher: GSA
Country: United States
Year: 1979
Series: MC
Map Type: Geology (Cross-Section)
Scale: 1:1,000,000
Map of (2) XSect AK Peninsula-Kodiak-Aleutian Trench
Title: Ugashik
Publisher: US Geological Survey
Country: United States
Year: 1963
Series: AK Topo 250
Map Type: Topographic
Scale: 1:250,000
Map of Ugashik
Title: Mt Katmai Area, Geol Map & Structure Sections in
Publisher: US Geological Survey
Country: United States
Year: 1959
Series: B
Map Type: Geology
Scale: 1:250,000
Map of Mt Katmai Area, Geol Map & Structure Sections in
Title: Mt Katmai
Publisher: US Geological Survey
Country: United States
Year: 1951
Series: AK Topo 250
Map Type: Topographic
Scale: 1:250,000
Map of Mt Katmai
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 117233-100 Dacite Peulik Volcano --
NMNH 117233-101 Dacite Peulik Volcano --
NMNH 117233-102 Basalt Peulik Volcano --
NMNH 117233-103 Basalt Peulik Volcano --
NMNH 117233-99 Dacite Peulik Volcano --
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