Okmok 1938/7
Start: July 1938 ± 2 Months [1]
Event Type: Other
Description: The Anchorage Daily News reported on October 20, 1938, that U.S. Coast and Geodetic Survey crews of the ships Pioneer and Surveyor had reported "Mount Tulik on Umnak Island" active during the summer of 1938. The deeply glaciated nature of Mount Tulik (Coats, 1950; Miller and others, 1998) indicates that it has not been active within historic time. Eruptions attributed to Tulik are almost certainly eruptions at Okmok instead. Coats (1950) reports this eruption as occurring in October; this date probably references the date of the newspaper article and not the date of the eruption, which seems to have occurred sometime during the summer months. Powers (1958) reports a lava flow associated with this eruption, as well.
References Cited
[1] Three peaks busy boiling in Aleutians, Coast and Geodetic Survey crews home from work, tell of adventures, 1938
Unknown, 1938, Three peaks busy boiling in Aleutians, Coast and Geodetic Survey crews home from work, tell of adventures: Anchorage Daily Times, v. Oct. 20, 1938, Anchorage, AK, p. 4.[2] Volcanic activity in the Aleutian Arc, 1950
Coats, R. R., 1950, Volcanic activity in the Aleutian Arc: U.S. Geological Survey Bulletin 0974-B, p. 35-49, 1 sheet, scale 1:5,000,000.
plate 1 PDF 819 KB
full-text PDF 783 KB [3] Alaska Peninsula-Aleutian Islands, 1958
Powers, H. A., 1958, Alaska Peninsula-Aleutian Islands: in Williams, H., (ed.), Landscapes of Alaska, Los Angeles, CA, University of California Press, p. 61-75.[4] Volcanoes of the world [2nd edition], 1994
Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.Complete Eruption References
Catalog of the historically active volcanoes of Alaska, 1998
Miller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report 98-0582, 104 p.
intro and TOC PDF 268 KB
references PDF 43 KB 
Volcanoes of the world [2nd edition], 1994
Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.
Hard Copy held by AVO at FBKS - CEC shelf
Alaska Peninsula-Aleutian Islands, 1958
Powers, H. A., 1958, Alaska Peninsula-Aleutian Islands: in Williams, H., (ed.), Landscapes of Alaska, Los Angeles, CA, University of California Press, p. 61-75.
Volcanic activity in the Aleutian Arc, 1950
Coats, R. R., 1950, Volcanic activity in the Aleutian Arc: U.S. Geological Survey Bulletin 0974-B, p. 35-49, 1 sheet, scale 1:5,000,000.
plate 1 PDF 819 KB
full-text PDF 783 KB 
Three peaks busy boiling in Aleutians, Coast and Geodetic Survey crews home from work, tell of adventures, 1938
Unknown, 1938, Three peaks busy boiling in Aleutians, Coast and Geodetic Survey crews home from work, tell of adventures: Anchorage Daily Times, v. Oct. 20, 1938, Anchorage, AK, p. 4.
Hard Copy held by AVO at FBKS - CEC file cabinet