United States · Maar
Ukinrek maars
Ukinrek Maars
- Type
- Maar
- Elevation
- 91m
- Last eruption
- 1977
- Type
- Maar
- Country
- United States
- Region
- North America / Alaska Peninsula Volcanic Arc
- Elevation
- 91m
- Coordinates
- 57.834, -156.520
- Last eruption
- 1977
- Tectonic setting
- Subduction zone / Continental crust (> 25 km)
- Landform
- Minor (basaltic)
- Major rock type
- Basalt / Picro-basalt
Geological summary
Ukinrek Maars are two explosion craters that were created in an area without previous volcanic activity during a 10-day phreatomagmatic eruption March-April 1977.
Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →
From Wikipedia
The Ukinrek maars are two volcanic craters on the north side of the Aleutian Range in Alaska that were formed by a phreatomagmatic eruption in 1977. The maars are 1.5 km south of Becharof Lake and 12 km northwest of Peulik Volcano, on a low area of the range, bordering the Bering Sea. The western of the two is elliptical in shape and up to 170 m in diameter and 35 m deep. The other lies 600 m to the east and is circular and up to 300 m in diameter and 70 m deep. The east maar has a 49 m-high lava dome within its crater lake.
Wikipedia · CC BY-SA · Read full article →
Eruption history
2 recordedGlossaryRecord summary
- Confirmed eruptions
- 2
- Uncertain eruptions
- 0
- Span of confirmed record
- 350 BCE – 1977
- Largest confirmed eruption
- VEI 3 (1977)
- Confirmed eruptions since 1900
- 1
Detailed timeline
- 1977VEI 3Observed1977-03-30 – 1977-04-09West and East Ukinrek Maars
- 350 BCEVEI ?Geological estimate350 BCE – end unknownGas Rocks
Nearby volcanoes
External links
⚠ For reference only. Not for emergency response.