Westdahl Volcano
Mountain in the state of Alaska
From Wikipedia, the free encyclopedia
Westdahl Peak, also known as Westdahl Volcano or Mount Westdahl, is a stratovolcano of the Aleutian Range, in the U.S. state of Alaska. The volcano last erupted from November 29, 1991, to January 15, 1992.[2][3]
| Westdahl Volcano | |
|---|---|
Mount Westdahl (the tallest peak in the middle), as seen in 2026 from a passing transpacific flight | |
| Highest point | |
| Elevation | 5,426 ft (1,654 m)[1][2] |
| Prominence | 1,365 ft (416 m) |
| Coordinates | 54°31′05″N 164°39′00″W |
| Geography | |
  Westdahl Volcano Location in Alaska | |
| Location | Unimak Island,Alaska, USA |
| Parent range | Aleutian Range |
| Topo map | USGS Unimak C-2 |
| Geology | |
| Formed by | Subduction zone volcanism |
| Rock age | Holocene |
| Mountain type | Stratovolcano |
| Volcanic arc | Aleutian Arc |
| Last eruption | 1991 to 1992 |
It is on Unimak Island, near the western tip of the Alaska Peninsula. The volcano has a second summit, called Faris Peak, which is actually the highest point at 5,426 feet (1,654 m).[4] Westdahl Peak currently has a summit elevation of 5,118 feet (1,560 m).[2]
Other historical eruptions, all attributed to Westdahl by the Alaska Volcano Observatory, have been reported in 1795–1796, 1827–1829, 1951, 1964 and 1978. A couple eruptions were originally reported to be from nearby Pogromni Volcano, but the peak is old, eroded and most likely hasn't erupted since Pleistocene time.[5][2]
See also
- Fisher Caldera — also on Unimak Island.
- Alaska Volcano Observatory