Banua Wuhu

Banua Wuhu is a submarine volcano in the Sangihe Islands off North Sulawesi. The structure rises over 400 meters from the sea floor and ends about 5 meters below the surface, where bubbles regularly emerge from the water.

The volcano created several temporary islands during active eruptions, including a peak about 90 meters high that emerged in 1835. This landmass gradually eroded and disappeared beneath the ocean surface again by 1848.

The inhabitants of adjacent Mahengetang Island maintain traditional practices influenced by the continuous presence of underwater volcanic activities.

The site is best observed from a boat, where you can see the gas vents at the surface. You will need water transport to reach the exact location at coordinates 3°08'16"N 125°29'26"E.

This underwater volcano still shows active signs when observed from a boat, with bubbles and gas continuously rising from the water. These visible demonstrations reveal how the volcano remains geologically active without currently building islands above the surface.

Elevation above the sea: -5 m

GPS coordinates: 3.14552,125.44254

Latest update: December 11, 2025 11:00