Gemini-Oscostar, Vanuatu

Submarine volcano · -33 m (-108 ft) · SW Pacific

Gemini-Oscostar is a submarine volcano in Vanuatu, -33 m (-108 ft) high. Its last known eruption: 1964 or later. NOAA records no significant eruption here.

Gemini-Oscostar on the map

Gemini-Oscostar 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

The volcano

Type: Submarine volcano
Elevation: -33 m (-108 ft)
Country: Vanuatu
Region: SW Pacific
Summit: 20.957° S, 170.130° E
Last known eruption: 1964 or later
Holocene activity known from: Historical
Smithsonian volcano number: 258001

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 Gemini-Oscostar 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.