Kaguyak

Photo of this volcano
  • United States
  • Alaska
  • Lava dome(s)
  • 3850 BCE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 58.608°N
  • 154.028°W

  • 901 m
    2955 ft

  • 312250
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Kaguyak.

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

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

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
3850 BCE (?) Unknown Confirmed 5 Radiocarbon (uncorrected) Kaguyak caldera
4060 BCE ± 150 years Unknown Confirmed   Radiocarbon (uncorrected)

The Global Volcanism Program has no synonyms or subfeatures listed for Kaguyak.

Photo Gallery


The small, but spectacular 2.5-km-wide Kaguyak caldera,seen here from the west, is filled by a lake that lies more than 550 m below the caldera rim. A post-caldera lava dome extends into the lake on the SW side and another dome forms a small island in the center of the lake. The caldera is unglaciated and the voluminous caldera-forming deposits have been radiocarbon dated at at 5800 years ago. A large pre-caldera lava dome forms the high point on the east caldera rim. The broad valley of Big River descends to Shelikof Strait at the upper right.

Photo by Chris Nye, 1982 (Alaska Division of Geological and Geophysical Surveys, Alaska Volcano Observatory).
See title for photo information.
Fourpeaked volcano, the 2104-m-high glacier-covered peak at the upper left is one of a group of poorly known volcanoes NE of Katmai National Park. Much of the volcano's surface is hidden beneath Fourpeaked Glacier; the few exposed outcrops are lava flows interlayered with volcanic agglomerate. Rocks near the summit are extensively hydrothermally altered. The age of the volcano is not known. In the foreground is the dramatic young, 2.5-km-wide Kaguyak caldera, filled by a lake and 3 lava domes.

Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys, Alaska Volcano Observatory).
See title for photo information.
Snow and ice covers the surface of the lake filling Kaguyak caldera in this view from the NW. The caldera was formed during a voluminous eruption about 5800 years ago that produced pyroclastic flows that reached Shelikof Strait. Two lava domes, one large and the other just sticking above the center of the lake were formed some time after the caldera-forming eruption, following formation of a shallow lake.

Photo by Tom Miller, 1998 (U.S. Geological Survey and Alaska Volcano Observatory).
See title for photo information.

Smithsonian Sample Collections Database


The following 9 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 117233-65 Tuff
NMNH 117233-66 Pumice
NMNH 117233-67 Dacite
NMNH 117233-68 Tuff
NMNH 117233-69 Tuff
NMNH 117233-70 Pumice
NMNH 117233-71 Pumice
NMNH 117233-72 Pumice
NMNH 117233-73 Pumice

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