Unnamed, United States

Submarine volcano? · Mariana Is-C Pacific

Unnamed is a submarine volcano? in the United States. Its last known eruption: an uncertain Holocene eruption. NOAA records no significant eruption here.

Unnamed on the map

Unnamed 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

No USGS alert level is set for this volcano, or the USGS did not answer just now.

The volcano

Type: Submarine volcano?
Country: United States
Region: Mariana Is-C Pacific
Summit: 20.300° N, 143.200° E
Last known eruption: An uncertain Holocene eruption
Holocene activity known from: Uncertain

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 Unnamed 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. Volcano numbers are the Smithsonian Institution’s Global Volcanism Program’s.