List of volcanoes in Indonesia

The 150 entries in the list below are grouped into six geographical regions, four of which belong to the volcanoes of the Sunda Arc trench system.

[5] The International Association of Volcanology and Chemistry of the Earth's Interior has named Mount Merapi as a Decade Volcano since 1995 because of its high volcanic activity.

Many contemporary active volcanoes rise as young parasitic cones from flank vents or at a central crater.

[7] Particularly for Indonesia, Simkin and Siebert used a catalogue of active volcanoes from the International Association of Volcanology and Chemistry of the Earth's Interior publication series.

The geography of Sumatra is dominated by a mountain range called Bukit Barisan (lit: "a row of hills").

The mountain range spans nearly 1,700 km (1,100 mi) from the north to the south of the island, and it was formed by movement of the Australian tectonic plate.

The separation was caused by a large eruption that filled the lowland between Weh and the rest of the mainland with sea water in the Pleistocene epoch.

Krakatau erupted violently in 1883, destroying two-thirds of the island and leaving a large caldera under the sea.

[16] Ijen has a unique colourful caldera lake which is an extremely acidic natural reservoir (pH<0.3).

Note: Height of Krakatau is of Rakata, not of the active Anak Krakatau The Lesser Sunda Islands is a small archipelago which, from west to east, consists of Bali, Lombok, Sumbawa, Flores, Sumba and the Timor islands; all are located at the edge of the Australian continental shelf.

Active volcanoes are found in the northern peninsula and continuously stretch to the north to Sangihe Islands.

Gamalama's island name is Ternate and it has been the centre for spice trading since the Portuguese Empire opened a fort in 1512.

Due to its location as the centre for spice trading during the Age of Discovery, historical records of volcanic eruptions in Halmahera have been available as far back as the early 16th century.