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mer., 9 sept. 2020, 06:23

Makushin volcano (Aleutian Islands): Volcanic Alert Level lowered to Green

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

Makushin Volcano

Updated: 28 mars. 2024 21:51 GMT -
Stratovolcano 1800 m / 5,905 ft
Aleutian Islands, 53.89°N / -166.92°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 12 Oct 2023 (Volcanic Ash Advisory)

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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Style éruptif tipique: unspecified
Eruptions du volcan Makushin: 1995

Derniers séismes proches

HeureMag. / ProfondeurDistance / Lieu
18 mars 18:31 (Anchorage)
19 mars. 02:31 GMT
1.2

5.2 km
22 km à l'est États-Unis, 3.8 km à l'ouest de Unalaska, Zone de recensement d'Aleutians West, Alaska Info
dimanche, 17 mars 2024 GMT (1 séisme)
17 mars 06:55 (Anchorage)
17 mars. 14:55 GMT
1.2

5.8 km
22 km à l'est 3 km WSW of Dutch Harbor, Alaska Info
vendredi, 22 mars 2024 GMT (1 séisme)
22 mars 11:57 (Anchorage)
22 mars. 19:57 GMT
1.0

9.8 km
25 km à l'est Bering Sea, États-Unis, 7.1 km au nord de Dutch Harbor, Zone de recensement d'Aleutians West, Alaska Info
jeudi, 21 mars 2024 GMT (1 séisme)
21 mars 02:26 (Anchorage)
21 mars. 10:26 GMT
0.8

5.1 km
22 km à l'est États-Unis, 3.9 km à l'ouest de Unalaska, Zone de recensement d'Aleutians West, Alaska Info
dimanche, 17 mars 2024 GMT (1 séisme)
16 mars 19:48 (Anchorage)
17 mars. 03:48 GMT
0.8

4.6 km
22 km à l'est 3 km WSW of Dutch Harbor, Alaska Info
jeudi, 21 mars 2024 GMT (1 séisme)
21 mars 02:40 (Anchorage)
21 mars. 10:40 GMT
0.6

4.6 km
21 km à l'est 4 km W of Unalaska, Alaska Info

Introduction

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

Latest satellite images

makushin satellite image sat1makushin satellite image sat2

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