West Crater, United States

Volcanic field · 1,329 m (4,360 ft) · US-Washington

West Crater is a volcanic field in the United States, 1,329 m (4,360 ft) high. Its last known eruption: bC (Holocene). NOAA records no significant eruption here.

West Crater on the map

West Crater 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 19:14 UTC. USGS threat ranking: Low Threat.

Unassigned / Unassigned Cascades Volcano Observatory rates West Crater at alert level Unassigned, aviation color code Unassigned.

The observatory’s page

The volcano

Type: Volcanic field
Elevation: 1,329 m (4,360 ft)
Country: United States
Region: US-Washington
Summit: 45.880° N, 122.080° W
Last known eruption: BC (Holocene)
Holocene activity known from: Radiocarbon
Smithsonian volcano number: 321060

Significant eruptions

NOAA records eruptions that killed, did damage, were very large, or set off a tsunami or earthquake.

None on record.

Around it

The volcanoes within 300 km.

Earthquakes near West Crater 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.