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Ukinrek Maars description and information


Official Name: Ukinrek Maars
Type:Two maars
Most Recent Activity:March 30, 1977
Seismically Monitored: Yes
Color Code:GREEN
Alert Level:NORMAL
Elevation: 299 ft (91 m)
Latitude: 57.8338° N
Longitude:156.5139° W
CAVW Number:312131
Associated Features:West Maar
East Maar
Nearby towns:Kanatak 25 mi (41 km) SE
Ugashik 39 mi (63 km) SW
Egegik 41 mi (66 km) NW
Pilot Point 43 mi (70 km) SW
Anchorage 329 mi (529 km) NE
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]"



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