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Tanaga volcano

Stratovolcanoes 1806 m / 5,925 ft
Aleutian Islands, 51.89°N / -178.15°W
Current status: dormant (1 out of 5)
Tanaga webcams / live data | Reports
Tanaga volcano books
Last update: 23 Dec 2016
Typical eruption style: unspecified
Tanaga volcano eruptions: 1914
TimeMag. / DepthDistanceLocation
Wed, 6 Jun
Wed, 6 Jun 18:10 UTCM 1.7 / 17.7 km24 km- 28km SW of Tanaga Volcano, Alaska
Wed, 6 Jun 16:26 UTCM 1.2 / 18.1 km24 km- 32km SW of Tanaga Volcano, Alaska
Thu, 31 May
Thu, 31 May 13:27 UTCM 1.8 / 20.4 km29 km- 33km SW of Tanaga Volcano, Alaska
Tanaga volcano is the second largest volcano of the central Aleutians. It is the central and highest of 3 young stratovolcanoes oriented along a roughly E-W line at the NW tip of Tanaga Island.

Background:

Arcuate ridges to the east and south represent the rim of an arcuate caldera formed by collapse of an ancestral Tanaga volcano during the Pleistocene. Most Holocene eruptions originated from Tanaga volcano itself, which consists of two large cones, the western of which is the highest, constructed within a caldera whose 400-m-high rim is prominent to the SE. At the westernmost end of the Tanaga complex is conical Sajaka, a 1304-m-high double cone that may be the youngest of the three volcanoes. Sajaka One volcano collapsed during the late Holocene, producing a debris avalanche that swept into the sea, after which Sajaka Two cone was constructed within the collapse scarp.
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Smithsonian / GVP volcano information


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