Forecast Seamount, United States

Submarine volcano · -1,456 m (-4,777 ft) · Mariana Is-C Pacific

Forecast Seamount is a submarine volcano in the United States, -1,456 m (-4,777 ft) high. Its last known eruption: undated, but a probable Holocene eruption. NOAA records no significant eruption here.

Forecast Seamount on the map

Forecast Seamount 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
Elevation: -1,456 m (-4,777 ft)
Country: United States
Region: Mariana Is-C Pacific
Summit: 13.400° N, 143.920° E
Last known eruption: Undated, but a probable Holocene eruption
Holocene activity known from: Fumarolic
Smithsonian volcano number: 284220

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 Forecast Seamount 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.