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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 | Reports
Tanaga volcano books
Last update: 23 Dec 2016
Typical eruption style: unspecified
Tanaga volcano eruptions: 1914
TimeMag. / DepthDistanceLocation
Fri, 16 Feb
Fri, 16 Feb 09:52 UTCM 3.2 / 73 km13 km- 14km SSE of Tanaga Volcano, Alaska
Thu, 8 Feb
Thu, 8 Feb 23:20 UTCM 2.2 / 27 km35 km- 39km SSE of Tanaga Volcano, Alaska
Wed, 7 Feb
Wed, 7 Feb 11:28 UTCM 2.5 / 29.7 km22 km- 21km S of Tanaga Volcano, Alaska
Tue, 6 Feb
Tue, 6 Feb 06:24 UTCM 1.8 / 27.5 km22 km- 22km WSW of Tanaga Volcano, Alaska
Sun, 28 Jan
Sun, 28 Jan 09:39 UTCM 1.9 / 34 km39 km- 51km SE 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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