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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 51.944°N
  • 176.747°W

  • 1196 m
    3923 ft

  • 311111
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for Moffett.

 Available Weekly Reports

There are no Weekly Reports available for Moffett.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1600 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Sandwich Ash deposit
3750 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Intermediate Ash deposit
7850 BCE (?) Unknown Confirmed   Radiocarbon (corrected) Main Ash deposit

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Coats R R, 1956a. Geology of northern Adak Island, Alaska. U S Geol Surv Bull, 1028-C: 47-66.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Marsh B D, 1990. . (pers. comm.).

Motyka R J, Liss S A, Nye C J, Moorman M A, 1993. Geothermal resources of the Aleutian arc. Alaska Div Geol Geophys Surv, Prof Rpt, no 114, 17 p and 4 map sheets.

Myers J D, 1994. The Geology, Geochemistry and Petrology of the recent Magmatic Phase of the Central and Western Aleutian Arc. Unpublished manuscript, unpaginated.

Myers J D, Frost C D, 1994. A petrologic re-investigation of the Adak volcanic center, central Aleutian arc, Alaska. J Volc Geotherm Res, 60: 109-146.

Myers J D, March B D, Sinha A K, 1985. Strontium isotopic and selected trace element variations between two Aleutian volcanic centers (Adak and Atka): implications for the development of arc volcanic plumbing systems. Contr Mineral Petr, 91: 221-234.

Nye C J, McGimsey G, Power J, 1998. Volcanoes of Alaska. Alaska Div Geol Geophys Surv, Inf Circ, 38.

Waythomas C F, Miller T P, Nye C J, 2003. Geology and late Quaternary eruptive history of Kanaga volcano, a calc-alkaline stratovolcano in the western Aleutian Islands, Alaska. Studies by the U.S. Geological Survey in Alaska, 2001 U S Geol Surv Profl Pap, 1678: 181-197.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

Rising above Adak, the largest town of the Aleutians, Mount Moffett is a modest-sized, eroded stratovolcano with several flank lava domes. The summit cone has been largely destroyed by glacial erosion, and has been filled by an andesitic plug dome. Five other lava domes are scattered over the flanks of the volcano. The south flank lava dome is one of the youngest features of the northern Adak Island volcanoes. The Heart Lake lava flow west of Sweeper Cove on the SE side of the volcano is another young volcanic feature. Several Holocene ash layers on Adak Island have been attributed to Moffett volcano. Its proximity to Adak Naval Air Station makes this one of the most accessible of the Aleutian volcanoes. Kiguga Warm Springs are located at Cape Kiguga, west of Mount Moffet, and the northern part of Adak Island has been investigated for geothermal power production.