Eastern Gemini Seamount, Vanuatu
Additional observations have been made of the submarine eruption at
Eastern Gemini seamount in the southern New Hebrides island arc, Vanuatu,
- An overflight of the area on February
21 revealed an area of rising steam about 1,200 feet (400 m) in diameter.
This area is surrounded by an ellipse of brown water that extends down
current 12,000 feet (4,000 m). Every 3-9 minutes an explosion sends
black volcanic material about 60 feet (20 m) above sea level. The steaming
area decreases in size immediately after the explosion but then continues
to grow until the next explosion. The brown water forms from the dilution
of the black volcanic material.