Dukono

Geography & Climate

Dukono is located in Indonesia, within the Halmahera Volcanic Arc of the broader Western Pacific Volcanic Regions. Situated at 1.70° N, 127.88° E in the Northern Hemisphere, the volcano lies within a tropical climate zone. With a summit elevation of 1,273 meters above sea level, Dukono is a moderately sized peak that remains accessible to hikers and researchers for much of the year. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.

Geological Context

Dukono sits in a subduction zone, where one tectonic plate dives beneath another, creating intense heat and pressure that generates magma. Subduction zones are responsible for many of the world's most explosive volcanoes and deadliest eruptions. For communities in Indonesia near Dukono, this tectonic setting means the volcano is capable of producing powerful explosive eruptions, pyroclastic flows, and lahars that can threaten populated areas within tens of kilometers of the summit. The dominant rock type is andesite / basaltic andesite, a dark, fine-grained volcanic rock that forms from rapidly cooling, low-viscosity lava. Basaltic eruptions tend to be less explosive and produce fluid lava flows that can travel long distances. While less immediately dangerous than explosive eruptions, basaltic lava flows can destroy structures and infrastructure in their path, and volcanic gases released during these eruptions can affect air quality over a wide area.

Eruption History Summary

Dukono has 5 recorded eruptions in the geological database, spanning from 1550 CE to 1933 CE. The most powerful recorded event was a severe eruption capable of regional ash fall and pyroclastic flows in 1933 CE, reaching VEI 3 on the Volcanic Explosivity Index. Notable eruptions include 1933 CE (VEI 3), 1550 CE (VEI 3). This eruption frequency indicates a moderately active volcanic system with periodic reawakenings. The most recent eruption in 1933 CE places this volcano within the modern era of volcanological observation.

Significance

With a maximum recorded VEI of 3, Dukono has produced eruptions capable of generating pyroclastic flows and significant ash fall in the surrounding area. While not among the largest eruptions globally, VEI 3 events pose serious hazards to local populations and can disrupt regional air travel. With 5 recorded eruptions on file, Dukono has enough documented activity to help scientists identify patterns in its eruptive behavior.

GVP Reference Summary

The Dukono complex in northern Halmahera is on an edifice with a broad, low profile containing multiple peaks and overlapping craters. Almost continuous explosive eruptions, sometimes accompanied by lava flows, have occurred since 1933. During a major eruption in 1550 CE, a lava flow filled in the strait between Halmahera and the Gunung Mamuya cone, 10 km NE. Malupang Wariang, 1 km SW of the summit crater complex, contains a 700 x 570 m crater that has also had reported eruptions.

— Smithsonian Institution, Global Volcanism Program