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Gareloi volcano

Stratovolcano 1573 m / 5,161 ft
United States, Aleutian Islands, 51.79°N / -178.79°W
Current status: dormant (1 out of 5) | Reports
Gareloi volcano books
Typical eruption style: unspecified
Gareloi volcano eruptions: 1989 
TimeMag. / DepthDistanceLocation
Tue, 7 Aug
Tue, 7 Aug 02:35 UTCM 1.6 / 17.9 km20 km- 27km WSW of Tanaga Volcano, Alaska
Sat, 4 Aug
Sat, 4 Aug 22:45 UTCM 1.9 / 25.9 km23 km- 34km SW of Tanaga Volcano, Alaska
Mon, 23 Jul
Mon, 23 Jul 22:53 UTCM 1.3 / 6.3 km22 km- 31km SW of Tanaga Volcano, Alaska
Sun, 22 Jul
Sun, 22 Jul 17:40 UTCM 1.4 / 13.2 km28 km- 30km SW of Tanaga Volcano, Alaska
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Background:

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.
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Smithsonian / GVP volcano information


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