Global Volcanism Program | Image GVP-06436
Massive Gunung Awu volcano is surrounded by the sea on three sides at the northern end of Great Sangihe Island. The flat-topped summit is truncated by a large crater that has been the source of some of Indonesia's deadliest eruptions. Deep valleys dissecting the volcano's flanks provide passageways for pyroclastic flows and lahars.
Photo by J. Matahelumual, 1961 (Volcanological Survey of Indonesia).