St. Helens, United States

Stratovolcano · 2,549 m (8,363 ft) · US-Washington

St. Helens is a stratovolcano in the United States, 2,549 m (8,363 ft) high. Its last known eruption: 1964 or later. NOAA records 3 significant eruptions here, which killed 61 people where the toll is counted.

St. Helens on the map

St. Helens 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 15:32 UTC. USGS threat ranking: Very High Threat.

Normal / Green Cascades Volcano Observatory rates St. Helens at alert level Normal, aviation color code Green, since 2025-09-16 17:42 UTC.

CVO Mount St. Helens GREEN/NORMAL - Stong winds are resuspending ash at Mount St. Helens.

The latest notice The observatory’s page

The volcano

Type: Stratovolcano
Elevation: 2,549 m (8,363 ft)
Country: United States
Region: US-Washington
Summit: 46.200° N, 122.180° W
Last known eruption: 1964 or later
Holocene activity known from: Historical
Smithsonian volcano number: 321050

Significant eruptions

3 on record, newest first.

Around it

The volcanoes within 300 km.

Earthquakes near St. Helens 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.