No latest activity reported for Adagdak.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

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.

Alaska Volcano Observatory, 2005-. Volcanoes. {http://www.avo.alaska.edu/volcanoes.php}

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, 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

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

Mount Adagdak, at the NE tip of Adak Island, lies across Andrew Lagoon from Mount Moffett volcano and about 15 km NNE of Adak, the largest town of the Aleutians. Adagdak consists of a small stratovolcano capping an older shield volcano exposed on the southern side of the complex. An andesitic lava dome fills the summit crater. A late-stage basaltic lava dome was constructed on the SE flank, and a phreatic vent is located on the western flank of the shield volcano. The most recent eruptions from Mount Adagdak have been considered to be Holocene (Marsh, in Wood and Kienle 1990) or Pleistocene (Motyka et al. 1993, Nye et al. 1998). Three stages of volcanism were mapped by Bratten, the youngest of which was a lava dome dated at about 0.21 million years (AVO, 2005-). The older Andrew Bay volcano, located north of Andrew Lagoon between Adagdak and Moffett volcanoes, is preserved only in erosional remnants. Andrew Bay Hot Springs lie along the coast west of Mount Adagdak, and the northern part of Adak Island has been investigated for geothermal power potential.