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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, 19 Sep
Wed, 19 Sep 11:32 UTCM 1.3 / 10.1 km11 km- 35km W of Tanaga Volcano, Alaska
Wed, 19 Sep 00:02 UTCM 0.2 / 9.2 km9 km- 40km W of Tanaga Volcano, Alaska
Tue, 18 Sep
Tue, 18 Sep 09:56 UTCM 0.6 / 12.9 km13 km- 33km W of Tanaga Volcano, Alaska
Tue, 18 Sep 09:52 UTCM 0.8 / 6.5 km34 km- 34km SSW of Tanaga Volcano, Alaska
Tue, 18 Sep 06:22 UTCM 1.0 / 11.6 km11 km- 39km W of Tanaga Volcano, Alaska
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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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