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Takawangha volcano

Updated: Jun 5, 2023 22:48 GMT -
Stratovolcano 1449 m / 4,754 ft
Tanaga Island, Aleutian Islands, Alaska, 51.87°N / -178.01°W
Current status: restless (2 out of 5)
Last update: 22 Mar 2023 (Smithsonian / USGS Weekly Volcanic Activity Report)
Snow-clad Takanangha volcano on Tanaga Island (image: Loewen, M. W. via AVO / USGS)
Snow-clad Takanangha volcano on Tanaga Island (image: Loewen, M. W. via AVO / USGS)

Takawangha is a 1449-m-high, young stratovolcano on northern Tanaga Island near the western end of the Andreanof Islands in the Aleutian arc. It is capped by an ice-filled summit caldera.
Due to its remoteness, there are no historical observations of activity, but radiocarbon dates indicate it has probably been active about 500 years ago. In November 2022, seismic unrest was detected under the volcano, suggesting internal magma movements that could be precursor to new activity in the future.

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Typical eruption style: unspecified
Takawangha volcano eruptions: 1550 (?)

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Friday, May 26, 2023 GMT (1 quake)
May 26, 2023 12:01 am (GMT -9) (May 26, 2023 09:01 GMT)

7.8 km
13 km (8.1 mi)
81 Km W of Adak, Alaska
Thursday, May 25, 2023 GMT (1 quake)
May 25, 2023 7:57 am (GMT -9) (May 25, 2023 16:57 GMT)

5.5 km
13 km (8.1 mi)
Andreanof Islands, Aleutian Islands
Wednesday, May 24, 2023 GMT (1 quake)
May 23, 2023 8:38 pm (GMT -9) (May 24, 2023 05:38 GMT)

7.8 km
15 km (9.3 mi)
81 Km W of Adak, Alaska
Tuesday, May 23, 2023 GMT (2 quakes)
May 22, 2023 9:28 pm (GMT -9) (May 23, 2023 06:28 GMT)

10.4 km
13 km (8.1 mi)
107 Km W of Adak, Alaska
May 22, 2023 8:44 pm (GMT -9) (May 23, 2023 05:44 GMT)

1.5 km
4.9 km (3 mi)
99 Km W of Adak, Alaska


Takawangha lies across a saddle from historically active Tanaga volcano to the west; older, deeply eroded volcanoes lie adjacent to Takawangha on the east. The summit of the dominantly basaltic to basaltic-andesite volcano is largely ice covered, with the exception of five Holocene craters that during the last few thousand years produced explosive eruptions and lava flows that reached the lower flanks of the volcano. No historical eruptions are known from Takawangha, although radiocarbon dating indicates explosive eruptions have occurred within the past several hundred years.
Smithsonian / GVP volcano information

See also: Sentinel hub | Landsat 8 | NASA FIRMS
Wed, 22 Mar 2023, 15:00

Takawangha volcano (Andreanof Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 15 March-21 March 2023 (New Activity / Unrest)

AVO reported that earthquake activity near Takawangha had decreased in both rate and magnitude from the peak of the swarm recorded during 9-11 March. More than 800 earthquakes, including multiple M2 and above events, were detected beneath Tanaga Island at depths less than 9 km below sea level during 11-17 March. The decline in activity decreased the potential for an eruption, so AVO lowered the Volcano Alert Level to Advisory (the second lowest level on a four-level scale) and the Aviation Color Code to Yellow (the second lowest color on a four-color scale) on 16 March. ... Read all
Fri, 17 Mar 2023, 03:55

Takawangha volcano (Tanaga Island, Aleutians): alert status dropped to "yellow"

Tanaga Island as seen from space on 23 Feb (image: Sentinel-2)
The seismic crisis near the volcano has waned significantly both in magnitude and rate from the swarm peak during 9-11 March. ... Read all
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