Global Volcanism Program | Image GVP-10137
Karangetang (Api Siau) is one of Indonesia's most active volcanoes. Twentieth-century eruptions have included frequent explosive activity that is sometimes accompanied by pyroclastic flows and lahars. Lava dome growth has occurred in the summit craters; collapse of lava flow fronts has also produced pyroclastic flows.
Photo by Volcanological Survey of Indonesia.