Catalog record
These fields are copied from the Smithsonian Global Volcanism Program Holocene volcano snapshot stored on this site. The file was fetched 2026-09-19T12:21:44Z. It is a location catalog, not a live alert.
- Catalog name
- Shishaldin
- GVP number
- 311360
- Country
- United States
- Type
- Stratovolcano
- Elevation
- 2,857 m
- Region
- North America Volcanic Regions
- Subregion
- Aleutian Ridge Volcanic Arc
- Tectonic setting
- Subduction zone / Continental crust (> 25 km)
- Last-eruption year
- 2023
- Evidence code
- Eruption Observed
- Latitude, longitude
- 54.756, -163.97
Elevation rank in the Aleutian Ridge Volcanic Arc in this snapshot: 1 of 47. Rank is by the listed elevation only. It is not a hazard ranking.
How to read the last-eruption year
The year is a catalog field. A recent year means the snapshot recorded activity in that year. It is not an alert level, a size, or a statement about what happens next. Evidence codes in this file include “Eruption Observed” and “Eruption Dated.” Those are Smithsonian categories for how the eruption year was established, not a forecast flag.
Setting
Shishaldin is a stratovolcano at 2,857 m, last-eruption year 2023. Pavlof, in the same Aleutian Ridge subregion, is listed at 2,493 m with a last-eruption year of 2022. Redoubt is not in that subregion. The snapshot places Redoubt in the Alaska Peninsula Volcanic Arc at 3,108 m, last-eruption year 2009. The ridge and the peninsula are different catalog groups on one plate margin.
Shishaldin’s coordinates fall in the Alaska / Gulf of Alaska rectangle. The Aleutian Islands use two more rectangles because the chain crosses the date line. The USGS largest-earthquake list includes the 1964 M9.2 Alaska earthquake, the 1957 M8.6 Andreanof Islands earthquake, the 1965 M8.7 Rat Islands earthquake, and the 1946 M8.6 Unimak Island earthquake. Those are epicenters. This volcano is a catalog point. The Alaska-Aleutian page keeps them separate.
Inside these documented rectangles: Alaska / Gulf of Alaska. The rectangles are documented on the About page. They are a lat/lon belt, not an official plate polygon.
Other volcanoes in this subregion
Highest listed elevations in the Aleutian Ridge Volcanic Arc in this snapshot, excluding this volcano when it is already first:
- Veniaminof, 2,507 m, last-eruption year 2021.
- Pavlof, 2,493 m, last-eruption year 2022.
- Vsevidof, 2,160 m, last-eruption year 1878.
Distance to published great-earthquake epicenters
The distances below use this volcano’s catalog coordinates and epicenters from the USGS list of the 20 largest earthquakes since 1900. They are spherical distances to points, not distances to a fault trace, and not a hazard score.
- 1946 M8.6 Unimak Island, Alaska (1946-04-01 12:29 UTC) — 159 km from the catalog point.
- 1957 M8.6 Andreanof Islands, Aleutians (1957-03-09 14:23 UTC) — 857 km from the catalog point.
- 1964 M9.2 Great Alaska earthquake (1964-03-28 03:36 UTC) — 1,194 km from the catalog point.
You can repeat the measurement for any coordinates on the distance to fault references tool.
What this page will not tell you
It will not tell you the next eruption time, the next earthquake on the neighboring trench, or an evacuation route. For U.S. volcano notices, use the USGS Volcano Hazards Program. For earthquakes, use the USGS event pages linked from Live Quakes. This site’s volcano map only draws the Holocene catalog.