Okmok, United States

Shield volcano · 1,073 m (3,520 ft) · Aleutian Is

Okmok is a shield volcano in the United States, 1,073 m (3,520 ft) high. Its last known eruption: 1964 or later. NOAA records 2 significant eruptions here.

Okmok on the map

Okmok and the volcanoes within 300 km, colored by when each last erupted.

Since 1964
1900 to 1963
1800s
AD 1 to 1799
Before AD 1, or undated

Open the live map with volcanic ash advisories

Now

From the USGS Volcano Hazards Program, read 16:51 UTC. USGS threat ranking: High Threat.

Normal / Green Alaska Volcano Observatory rates Okmok at alert level Normal, aviation color code Green, since 2026-01-30 02:55 UTC.

AVO Okmok GREEN/NORMAL - Resuspended ash observed from multiple sources on Unmak Island. Okmok Volcano aviation color code and alert level remain at GREEN/NORMAL

The latest notice The observatory’s page

The volcano

Type: Shield volcano
Elevation: 1,073 m (3,520 ft)
Country: United States
Region: Aleutian Is
Summit: 53.430° N, 168.130° W
Last known eruption: 1964 or later
Holocene activity known from: Historical
Smithsonian volcano number: 311290

Significant eruptions

2 on record, newest first.

Around it

The volcanoes within 300 km.

Earthquakes near Okmok Volcanic ash advisories on the live map

Sources

Volcanoes and significant eruptions from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. Alert levels, color codes and notices from the USGS Volcano Hazards Program and its observatories, public domain. Volcano numbers are the Smithsonian Institution’s Global Volcanism Program’s.