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News
Current seismic recording at Tanaga volcano (TASE station, AVO)
Sunday, Jan 27, 2013
Seismic activity is low. Some small local earthquakes including some aftershocks from the 21 Jan 5.1 quake are still occurring. [more]
Current seismic recording at Tanaga volcano (TASE station, AVO)
Tuesday, Jan 22, 2013
A magnitude M5.1 earthquake occurred 31 km at 7 km depth southwest of Tanaga yesterday morning. ... [more]
 

Tanaga volcano

Stratovolcanoes 1806 m / 5,925 ft
Aleutian Islands, 51.89°N / -178.15°W
Current status: normal or 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
Fri, 16 Nov
Fri, 16 Nov 17:31 UTCM 1.6 / 20.6 km30 km- 30km SW of Tanaga Volcano, Alaska
Fri, 16 Nov 08:43 UTCM 0.7 / 11.9 km7 km- 39km WSW of Tanaga Volcano, Alaska
Wed, 14 Nov
Wed, 14 Nov 12:45 UTCM 1.9 / 20.7 km28 km- 40km SW of Tanaga Volcano, Alaska
Mon, 29 Oct
Mon, 29 Oct 09:45 UTCM 1.5 / 19.8 km29 km- 31km SW of Tanaga Volcano, Alaska
Wed, 24 Oct
Wed, 24 Oct 11:48 UTCM 1.1 / 15.3 km8 km- Andreanof Islands, Aleutian Islands, Alaska
View all recent quakes
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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