Dukono is a volcano located at the northernmost corner of Halmahera island. It has a broad profile and is capped by compound craters. Dukono is an active volcano. During the major eruption in 1550, a lava flow filled in the strait between Halmahera and the north flank cone of Mount Mamuya. It was an eruption of scale 3 on VEI. Deaths were reported but the figure is unknown. Smaller eruptions occurred in 1719, 1868, and 1901.