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.

Eruptive History


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


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

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.

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.

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. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 117233-100 Dacite
NMNH 117233-101 Dacite
NMNH 117233-102 Basalt
NMNH 117233-103 Basalt
NMNH 117233-99 Dacite

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