2 spots left on Iceland Geo Tour 16-30 July 2022
Wed, 9 Sep 2020, 06:23
Makushin volcano yesterday (image: AVO)
The Alaska Volcano Observatory (AVO) reported that the seismicity at the volcano has been steadily declining for months, following an earthquake sequence that began on 15 June. ... Read all
Wed, 2 Sep 2020, 06:00
Seismicity at Makushin returned to background levels after steadily declining for almost three months following a sequence of earthquakes about 10 km E of the summit at a depth of 8 km that had started on 15 June. AVO lowered the Aviation Color Code and Volcano Alert Level remained at Green and Normal, respectively, on 8 September. ... Read all

Makushin volcano

Updated: Jul 4, 2022 19:17 GMT - Refresh
Stratovolcano 1800 m / 5,905 ft
Aleutian Islands, 53.89°N / -166.92°W
Current status: normal or dormant (1 out of 5)
Last update: 12 Dec 2021 (Volcanic Alert Level lowered to Green)

Makushin volcano is an ice-covered 1800-m-high stratovolcano on northern Unalaska Island west of the town of Dutch Harbor. The volcano contains a 2.5-km-wide caldera. Its broad, domical shape contrasts with the usual steep-sided profile of most other volcanoes in the Aleutians.

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Typical eruption style: unspecified
Makushin volcano eruptions: 1995
Lastest nearby earthquakes: No recent earthquakes

Background

Much of the volcano was formed during the Pleistocene, but the caldera (which formed about 8000 years ago), Sugarloaf cone on the ENE flank, and a cluster of about a dozen explosion pits and cinder cones at Point Kadin on the WNW flank, are of Holocene age. A broad band of NE-SW-trending satellitic vents cuts across the volcano. The composite Pakushin cone, with multiple summit craters, lies 8 km to the SW of Makushin. Frequent explosive eruptions have occurred during the past 4000 years, sometimes accompanied by pyroclastic flows and surges. Geothermal areas are found in the summit caldera of Makushin and on the SE and eastern flanks of the volcano. They represent the largest and most investigated high-temperature geothermal resources in Alaska. Small-to-moderate explosive eruptions have been recorded at Makushin since 1786.
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Smithsonian / GVP volcano information


See also: Sentinel hub | Landsat 8 | NASA FIRMS
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