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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: dormant (1 out of 5)
Tanaga webcams / live data
Tanaga volcano books
Last update: 23 Dec 2016
Typical eruption style: unspecified
Tanaga volcano eruptions: 1914
TimeMag. / DepthDistanceLocation
Mon, 26 Jun
Mon, 26 Jun 08:05 UTCM 2.8 / 5.3 km25 km- 39km SW of Tanaga Volcano, Alaska
Wed, 21 Jun
Wed, 21 Jun 21:13 UTCM 1.9 / 4.8 km23 km- 22km S of Tanaga Volcano, Alaska
Wed, 21 Jun 17:49 UTCM 1.8 / 13.1 km27 km- 36km SW of Tanaga Volcano, Alaska
Tue, 20 Jun
Tue, 20 Jun 16:45 UTCM 1.4 / 13.2 km29 km- 31km SW of Tanaga Volcano, Alaska
Tue, 20 Jun 11:53 UTCM 4.2 / 3.9 km24 km- 34km SW of Tanaga Volcano, 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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