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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 53.93°N
  • 168.03°W

  • 150 m
    492 ft

  • 311300
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for Bogoslof.

 Available Weekly Reports

There are no Weekly Reports available for Bogoslof.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1992 Jul 6 1992 Jul 24 Confirmed 3 Historical Observations North tip of island (NE of 1927 dome)
[ 1951 Sep 21 ] [ Unknown ] Uncertain 0  
1931 Oct 31 Unknown Confirmed 1 Historical Observations 1926-1927 dome
1926 Jul 1928 Confirmed 2 Historical Observations Between New and Old Bogoslof
[ 1913 Jul ] [ Unknown ] Uncertain     Tahoma Peak
1909 Sep 1910 Sep 19 Confirmed 2 Historical Observations Tahoma Peak
[ 1908 Jan 15 ± 45 days ] [ Unknown ] Uncertain     Metcalf Peak
1906 Mar 1 ± 30 days 1907 Sep 1 Confirmed 3 Historical Observations Metcalf Peak, McCullough Peak
1883 Sep 27 (in or before) 1895 ± 2 years Confirmed 3 Historical Observations New Bogoslof (Grewingk)
1806 1823 Confirmed 2 Historical Observations Old Bogoslof (Castle Rock)
1796 May 1804 Confirmed 3 Historical Observations Old Bogoslof (Castle Rock)

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.

Byers F M, 1959. Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska. U S Geol Surv Bull, 1028-L: 267-365.

Coats R R, 1950. Volcanic activity in the Aleutian Arc. U S Geol Surv Bull, 974-B: 35-47.

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

Miller T P, McGimsey R G, Richter D H, Riehle J R, Nye C J, Yount M E, Dumoulin J A, 1998. Catalogue of the historically active volcanoes of Alaska. U S Geol Surv Open-File Rpt, 98-582: 1-104.

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.

Smith R L, Shaw H R, Luedke R G, Russell S L, 1978. Comprehensive tables giving physical data and thermal energy estimates for young igneous systems of the United States. U S Geol Surv Open-File Rpt, 78-925: 1-25.

Bogoslof is the emergent summit of a submarine volcano that lies 40 km north of the main Aleutian arc. It rises 1500 m above the Bering Sea floor. Repeated construction and destruction of lava domes at different locations during historical time has greatly modified the appearance of this "Jack-in-the-Box" volcano and has introduced a confusing nomenclature applied during frequent visits of exploring expeditions. The present triangular-shaped, 0.75 x 2 km island consists of remnants of lava domes emplaced from 1796 to 1992. Castle Rock (Old Bogoslof) is a steep-sided pinnacle that is a remnant of a spine from the 1796 eruption. Fire Island (New Bogoslof), a small island located about 600 m NW of Bogoslof Island, is a remnant of a lava dome that was formed in 1883.