Amukta
Aleutian Ridge Volcanic Arc, United States. This page separates the permanent volcano catalogue, historical eruption records, and selective weekly activity reports.
- Coordinates
- 52.50° N, 171.25° W
- Elevation
- 1,066 m
- Last recorded eruption
- 1996 CE
- Historical eruption records
- 8
- Primary type
- Stratovolcano
- Evidence
- Eruption Observed
- GVP database
- 5.4.0
- Catalogue revision
- Revision 2
Volcano profile
- Volcanic landform
- Composite
- Tectonic setting
- Subduction zone / Intermediate crust (15-25 km)
- Geologic epoch
- Holocene
- Major rock type
- Andesite / Basaltic Andesite
- Region
- North America Volcanic Regions
- Subregion
- Aleutian Ridge Volcanic Arc
Geological summary
The symmetrical Amukta stratovolcano lies in the central Aleutians SW of Chagulak Island and is the westernmost of the Islands of the Four Mountains group. The stratovolcano was constructed at the northern side of an arcuate caldera-like feature that is open to the sea along the southern coast of the 8-km-wide Amukta Island. It overlies a broad shield volcano and is topped by a 400-m-wide crater, and a cinder cone is located near the NE coast. There have been several reported eruptions from both summit and flank vents.
Separate activity dataset
Weekly volcanic activity reports
Smithsonian/USGS weekly reports are selective and preliminary. They are not a comprehensive list of all eruptions or volcanic activity.
No weekly report appears on this page. Absence from the weekly report does not establish an absence of volcanic activity.
Historical catalogue records
Eruption history
Dates can be approximate, incomplete, or BCE. These are historical catalogue observations, not a statement about present activity.
| Start | End | Activity | Confirmation | VEI | Evidence | Record |
|---|---|---|---|---|---|---|
| 1997-03-03 CE | Not supplied | Uncertain Eruption | Uncertain | 1 | Observations: Reported | GVP 19790Database 5.4.0 |
| 1996-09-17 CE | 1996-09-18 CE | Confirmed Eruption | Confirmed | 1 | Observations: Reported | GVP 19789Database 5.4.0 |
| 1987-09-04 CE (day qualifier ?) | 1987-09-04 CE (day qualifier ?) | Confirmed Eruption | Confirmed | 1 | Observations: Reported | GVP 19788Database 5.4.0 |
| 1963-02-13 CE | Not supplied | Confirmed Eruption | Confirmed | 3 | Observations: Reported | GVP 19787Database 5.4.0 |
| 1878-07-02 CE (day uncertainty +/- 182) | Not supplied | Confirmed Eruption | Confirmed | Not supplied | Observations: Reported | GVP 19786Database 5.4.0 |
| 1876-07-02 CE (day uncertainty +/- 182) | Not supplied | Uncertain Eruption | Uncertain | Not supplied | Not supplied | GVP 19785Database 5.4.0 |
| 1786-06 CE | 1791 CE | Confirmed Eruption | Confirmed | ^3 | Observations: Reported | GVP 19784Database 5.4.0 |
| 1770 CE | Not supplied | Uncertain Eruption | Uncertain | Not supplied | Not supplied | GVP 19783Database 5.4.0 |
Source and attribution
Source: Data: Smithsonian Institution Global Volcanism Program, Volcanoes of the World.
View the original Smithsonian GVP recordGlobal Volcanism Program, 2026. Volcanoes of the World 5.4.0.
The GVP database is scientific documentation that changes as evidence is reviewed. Historical dates may be approximate or uncertain. This platform is not an official emergency-warning service.
Read the GVP terms of useData freshness
- Source updated
- Not supplied
- Retrieved
- 11 Oct 2026, 13:07 UTC
- GVP database version
- 5.4.0
- Catalogue revision
- 2
Source-update and retrieval times describe this catalogue record. Each weekly report carries its own publication date and preliminary status.