Todoko-Ranu

Todoko-Ranu is a large volcanic complex south of Gamkonora in North Maluku, Halmahera, that includes two calderas. The 2 x 2.8 km nested Ranu calderas on the north contains a caldera lake in the smaller one. The lava-filled Todoko caldera is south of the Ranu calderas. The post-caldera Sahu cone, on the S flank of Todoko, is the high point of the complex. Gunung Onu, NW of Ranu caldera, lies at the northern end of the complex. No eruptions have been reported, but it was mapped as Holocene (Supriatna, 1980). Fumaroles are present at Ranu caldera and hot springs are found on Mt. Sahu. Youthful-looking lava flows reach the sea from several locations within the complex.