Space Shuttle photo STS068-0220-0004 of Erromango Island.
Traitor's Head is a stratovolcano with two historic eruptions. In 1881, the volcano erupted from a submarine vent on the northeast flank. In 1959, an eruption was reported from four submarine vents north of Erromango Island.
Sources of information on the volcanoes of Vanuatu (New Hebrides Islands).