Colo volcano, seen here in eruption in September 1983, forms the isolated island of Una-Una in the Gulf of Tomini, northern Sulawesi. The broad, low island is truncated by a 2-km-wide caldera. Only three eruptions have taken place in historical time, but two of those, in 1898 and 1983, caused extensive devastation over much of the island.

Copyrighted photo by Katia and Maurice Krafft, 1983.

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Colo