Gunungapi Wetar, volcanic island in Indonesia

Gunungapi Wetar is a stratovolcano forming an island north of Wetar in the Banda Sea. The summit rises 239 m above sea level, while the base lies over 5,000 m below, and the central cone has a small crater. The earliest solidified young lava flow is on the southwest slope.

Gunungapi Wetar has only two recorded eruptions in written sources: one in 1512 and another in 1699. Both are listed as historical explosions of the volcano, separated by nearly two centuries. No further eruptions have been recorded since 1699.

Visitors must reach the island by boat as it is completely isolated in the sea with no regular connections. The terrain is rough with steep slopes and loose soil, so waterproof gear and a local guide are strongly recommended.

The summit cone rises only 239 metres above the sea, yet the volcano's base lies on the seabed more than 5,000 metres down, so most of the mountain is underwater. The youngest solidified lava flow runs down the southwest slope.