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Gareloi Volcano

Updated: Jul 18, 2024 00:38 GMT -
Stratovolcano 1573 m / 5,161 ft
United States, Aleutian Islands, 51.79°N / -178.79°W
Current status: normal or dormant (1 out of 5)
Last update: 6 Mar 2024 (Smithsonian / USGS Weekly Volcanic Activity Report)
Gareloi volcano from the webcam on 8 June 2021
Gareloi volcano from the webcam on 8 June 2021

[smaller] [larger]
Typical eruption style: unspecified
Gareloi volcano eruptions: 1989 

Latest nearby earthquakes

TimeMag. / DepthDistance / Location
Jul 15, 08:30 pm (Adak)

9.9 km
14 km (8.7 mi) to the SE 140 km W of Adak, Alaska Info
Jul 15, 04:03 pm (Adak)

8.1 km
150 km W of Adak, Alaska Info
Friday, July 12, 2024 GMT (1 quake)
Jul 11, 05:21 pm (Adak)

14 km
26 km (16 mi) to the SE 136 km WSW of Adak, Alaska Info
Thursday, July 11, 2024 GMT (1 quake)
Jul 10, 07:37 pm (Adak)

4.6 km
151 km W of Adak, Alaska Info
Thursday, July 4, 2024 GMT (2 quakes)
Jul 4, 08:52 am (Adak)

12 km
5.9 km (3.6 mi) to the SW 154 km W of Adak, Alaska Info
Jul 4, 07:25 am (Adak)

8.5 km
23 km (14 mi) to the SE 129 km W of Adak, Alaska Info


The 8 x 10 km diameter Gareloi Island, the northernmost volcano of the Delarof Group at the western end of the Andreanof Islands, consists of a stratovolcano with two summits and a SE-trending fissure. This prominent fissure was formed during an eruption in 1929 and extends from the southern summit to the sea. Steep sea cliffs that are cut into rocks of an older, eroded center are found on the SW coast, and submarine deposits of three debris avalanches produced by edifice collapse are found offshore. Young lava flows cover the older volcano from the 1573-m-high summit of Gareloi to the coast along three broad axes trending NW, ENE, and south. The 1929 eruption originated from 13 craters along a 4-km-long fissure. Phreatic explosions were followed by the ejection of glassy pumice, lapilli, scoria, and older blocks, as well as by the emission of four short, steep lava flows, one of which reached the SE coast.
Smithsonian / GVP volcano information

Latest satellite images

gareloi satellite image sat1gareloi satellite image sat2
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Wed, 6 Mar 2024, 15:00

Gareloi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 February-5 March 2024 (Continuing Activity)

AVO reported that volcanic activity at Gareloi had decreased during the previous few weeks and that, although small earthquakes continue to be recorded, the current activity was at background levels. At 1150 on 5 March the Volcano Alert Level was lowered to Normal (the lowest level on a four-level scale) and the Aviation Color Code was lowered to Green (the lowest color on a four-color scale). ... Read all
Wed, 6 Mar 2024, 03:58

Gareloi volcano (States, Aleutian Islands): alert level downgraded to Green

The summit crater at Gareloi volcano (image: AVO)
The Alaska Volcano Observatory (AVO) lowered the alert status for the volcano to Green, as its general activity has decreased over the past few weeks. ... Read all

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