Ukinrek Maars
Facts
- Official Name: Ukinrek Maars
- Seismically Monitored: Yes
- Color Code: GREEN
- Alert Level: NORMAL
- Elevation: 91m (298ft)
- Latitude: 57.8338
- Longitude: -156.5139
- Smithsonian VNum: 312131
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Nearby Towns:
- Kanatak 26 mi (41 km) SE
- Ugashik 39 mi (64 km) SW
- Egegik 41 mi (66 km) NW
- Pilot Point 44 mi (70 km) SW
- King Salmon 59 mi (95 km) NW
Distance from Anchorage: 329 mi (529 km)
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Subfeatures:
- West Maar
- East Maar
Description
From Miller and others (1998) [1] : "Ukinrek Maars are a pair of phreatomagmatic explosion vents that formed on a low (less than 100 m high), 4-km-long, ridge in the Bering Sea Lowland 1.5 km south of Becharof Lake and 12 km northwest of Peulik Volcano. West Maar, elliptical in shape and up to 170 m in diameter and 35 m deep, formed on the northwest end of the ridge [2] . East Maar lies 600 m east of West Maar at a lower elevation. It is circular, up to 300 m in diameter and 70 m deep, and has a 49-m-high central lava dome that is now partly covered by a crater lake. Location of the maars apparently coincides with, and may be controlled by, the intersection of the Bruin Bay fault and regional structures [2] [3] "Name Origin
"Ukinrek" is a Yup'ik word meaning "two holes." This feature was named after its formation in 1977.
References Cited
[1] 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 [2] Ukinrek Maars, Alaska: I, April 1977 eruption sequence, petrology and tectonic setting, 1980
Kienle, Juergen, Kyle, P. R., Self, Stephen, Motyka, R. J., and Lorenz, Volker, 1980, Ukinrek Maars, Alaska: I, April 1977 eruption sequence, petrology and tectonic setting: Journal of Volcanology and Geothermal Research, v. 7, n. 1, p. 11-37.[3] Generalized geologic map of the Ugashik, Bristol Bay, and part of the Karluk quadrangles, Alaska, 1983
Detterman, R. L., Case, J. E., Wilson, F. H., Yount, M. E., and Allaway, W. H. Jr., 1983, Generalized geologic map of the Ugashik, Bristol Bay, and part of the Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 1539-A, unpaged, 1 sheet, scale 1:250,000.Current Activity
No new updates for Ukinrek Maars volcano since October 19, 2022, 3:05 pm.
