List of volcanoes in Indonesia
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The geography of Indonesia is dominated by
volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates ...
es that are formed due to
subduction zone Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the ...
s between the
Eurasian plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent an ...
and the
Indo-Australian plate The Indo-Australian Plate is a major tectonic plate that includes the continent of Australia and the surrounding ocean and extends northwest to include the Indian subcontinent and the adjacent waters. It was formed by the fusion of the Indian an ...
.
Some of the volcanoes are notable for their eruptions, for instance,
Krakatoa Krakatoa (), also transcribed (), is a caldera in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung. The caldera is part of a volcanic island group ( Krakatoa archipelago) comprising four islands. T ...
for its global effects in 1883, the
Lake Toba Caldera Lake Toba ( id, Danau Toba) ( Toba Batak: ᯖᯀᯬ ᯖᯬᯅ; romanized: ''Tao Toba'') is a large natural lake in North Sumatra, Indonesia, occupying the caldera of a supervolcano. The lake is located in the middle of the northern part of the i ...
for its supervolcanic eruption estimated to have occurred 74,000
years before present Before Present (BP) years, or "years before present", is a time scale used mainly in archaeology, geology and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s. Becaus ...
which was responsible for six years of
volcanic winter A volcanic winter is a reduction in global temperatures caused by volcanic ash and droplets of sulfuric acid and water obscuring the Sun and raising Earth's albedo (increasing the reflection of solar radiation) after a large, particularly explosiv ...
, and
Mount Tambora Mount Tambora, or Tomboro, is an active stratovolcano in West Nusa Tenggara, Indonesia. Located on Sumbawa in the Lesser Sunda Islands, it was formed by the active subduction zones beneath it. Before 1815, its elevation reached more than ...
for the most violent eruption in
recorded history Recorded history or written history describes the historical events that have been recorded in a written form or other documented communication which are subsequently evaluated by historians using the historical method. For broader world his ...
in 1815. Volcanoes in
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Gui ...
are part of the
Pacific Ring of Fire The Ring of Fire (also known as the Pacific Ring of Fire, the Rim of Fire, the Girdle of Fire or the Circum-Pacific belt) is a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur. The Ring ...
. The 150 entries in the list below are grouped into six geographical regions, four of which belong to the volcanoes of the
Sunda Arc The Sunda Arc is a volcanic arc that produced the volcanoes that form the topographic spine of the islands of Sumatra, Nusa Tenggara, and Java, the Sunda Strait and the Lesser Sunda Islands. The Sunda Arc begins at Sumatra and ends at Flores ...
trench system. The remaining two groups are volcanoes of
Halmahera Halmahera, formerly known as Jilolo, Gilolo, or Jailolo, is the largest island in the Maluku Islands. It is part of the North Maluku province of Indonesia, and Sofifi, the capital of the province, is located on the west coast of the island. Ha ...
, including its surrounding
volcanic island Geologically, a high island or volcanic island is an island of volcanic origin. The term can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs (which have often formed ...
s, and volcanoes of
Sulawesi Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu ...
and the
Sangihe Islands The Sangihe Islands (also spelled "Sangir", "Sanghir" or "Sangi") – id, Kepulauan Sangihe – are a group of islands which constitute two regencies within the province of North Sulawesi, in northern Indonesia, the Sangihe Islands R ...
. The latter group is in one volcanic arc together with the
Philippine The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
volcanoes. The most active volcano is
Mount Merapi Mount Merapi, ''Gunung Merapi'' (literally Fire Mountain in Indonesian and Javanese), is an active stratovolcano located on the border between the province of Central Java and the Special Region of Yogyakarta, Indonesia. It is the most ac ...
on
Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
. Since AD 1000, Kelut has erupted more than 30 times, of which the largest eruption was at scale 5 on the Volcanic Explosivity Index (VEI), while
Mount Merapi Mount Merapi, ''Gunung Merapi'' (literally Fire Mountain in Indonesian and Javanese), is an active stratovolcano located on the border between the province of Central Java and the Special Region of Yogyakarta, Indonesia. It is the most ac ...
has erupted more than 80 times. 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. As of 2012, Indonesia has 127 active volcanoes and about 5 million people active within the danger zones. It has been conjectured that the earthquake and tsunami event of 26 December 2004 could trigger eruptions, with
Mount Sinabung Mount Sinabung (Indonesian: ''Gunung Sinabung'', Karo: ''Deleng Sinabung'') is a Pleistocene-to- Holocene stratovolcano of andesite and dacite in the Karo plateau of Karo Regency, North Sumatra, Indonesia, from the Lake Toba supervolcano. Many ...
( dormant since the 1600s) erupting in 2010 as a possible example. The word for ''Mount'' in Indonesian and many regional languages of the country is ''Gunung''. Thus, Mount Merapi may be referred to as ''Gunung Merapi''.


Scope

There is no single standard definition for a volcano. It can be defined from individual vents, volcanic edifices or volcanic fields. Interior of ancient volcanoes may have been eroded, creating a new subsurface magma chamber as a separate volcano. Many contemporary active volcanoes rise as young parasitic cones from flank vents or at a central
crater Crater may refer to: Landforms * Impact crater, a depression caused by two celestial bodies impacting each other, such as a meteorite hitting a planet * Explosion crater, a hole formed in the ground produced by an explosion near or below the surf ...
. Some volcanic cones are grouped into one volcano name, for instance, the Tengger caldera complex, although individual vents are named by local people. The status of a volcano, either active or dormant, cannot be defined precisely. An indication of a volcano is determined by either its historical records,
radiocarbon dating Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was de ...
, or geothermal activities. The primary source of the list below is taken from the Volcanoes of the World book, compiled by two volcanologists Tom Simkin and Lee Siebert, in which active volcanoes in the past 10,000 years (
Holocene The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togeth ...
) are listed. 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 Simkin and Siebert list is the most complete list of volcanoes in Indonesia, but the accuracy of the record varies from one region to another in terms of contemporary activities and fatalities in recent eruptions. Complementary sources for the latest volcanic data are taken from the Volcanological Survey of Indonesia, a governmental institution which is responsible for volcanic activities and geological hazard mitigation in Indonesia, and some academic resources.


Geographical groups


Sumatra

The geography of
Sumatra Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...
is dominated by a
mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have ari ...
called Bukit Barisan (lit: "a row of hills"). The mountain range spans nearly from the north to the south of the island, and it was formed by movement of the Australian tectonic plate. The plate moves with a convergence rate of 5.5 cm/year which has created major
earthquake An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, fr ...
s on the western side of Sumatra including the 2004 Sumatra–Andaman earthquake. The tectonic movement has been responsible not only for earthquakes, but also for the formation of magma chambers beneath the island. Only one of the 35 active volcanoes, Weh, is separated from the Sumatran mainland. 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 The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
epoch. The largest volcano of Sumatra is the
supervolcano A supervolcano is a volcano that has had an eruption with a Volcanic Explosivity Index (VEI) of 8, the largest recorded value on the index. This means the volume of deposits for such an eruption is greater than 1,000 cubic kilometers (240 cubi ...
Toba Toba may refer to: Languages * Toba Sur language, spoken in South America * Batak Toba, spoken in Indonesia People * Toba people, indigenous peoples of the Gran Chaco in South America * Toba Batak people, a sub-ethnic group of Batak people from N ...
within the × Lake Toba, which was created after a
caldera collapse A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
(est. in 74,000
Before Present Before Present (BP) years, or "years before present", is a time scale used mainly in archaeology, geology and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s. Beca ...
). The eruption is estimated to have been at level eight on the VEI scale, the highest level for a volcanic eruption. The highest peak of the mountain range is Mount Kerinci with an elevation of 3,800 m (12,467 ft). , - , Sibayak , , stratovolcano , , align="right", , , 1881 , , , - , Sinabung , , stratovolcano , , align="right", , , 2 March 2021, , , - ,
Toba Toba may refer to: Languages * Toba Sur language, spoken in South America * Batak Toba, spoken in Indonesia People * Toba people, indigenous peoples of the Gran Chaco in South America * Toba Batak people, a sub-ethnic group of Batak people from N ...
, ,
supervolcano A supervolcano is a volcano that has had an eruption with a Volcanic Explosivity Index (VEI) of 8, the largest recorded value on the index. This means the volume of deposits for such an eruption is greater than 1,000 cubic kilometers (240 cubi ...
, , align="right", , , 75000 BC (8) , , , - , Helatoba-Tarutung , , fumarole field , , align="right", , ,
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
, , , - ,
Imun Imun is a small dacitic and rhyolitic lava cone at 20 km (12,42 miles) south of Lake Toba and 6 km (3,72 miles) north of the town of Situmeang. Due to its closeness to the much larger caldera A caldera ( ) is a large cauldron- ...
, , unknown , , align="right", , , unknown , , , - , Sibualbuali , , stratovolcano , , align="right", , , unknown , , , - , Lubukraya , , stratovolcano , , align="right", , , unknown , , , - , Sorikmarapi , , stratovolcano , , align="right", , , (1) , , , - , Talakmau , , complex volcano , , align="right", , , unknown , , , - , Sarik-Gajah , , volcanic cone , , align="right", unknown , , unknown , , , - , Marapi , , complex volcano , , align="right", , , 2018 , , , - , Tandikat , , stratovolcano , , align="right", , , (1) , , , - , Talang , , stratovolcano , , align="right", , , (2) , , , - , Kerinci , , stratovolcano , , align="right", , , (on going) , , , - , Hutapanjang , , stratovolcano , , align="right", , , unknown , , , - , Sumbing , , stratovolcano , , align="right", , , (2) , , , - , Masurai , , stratovolcano , , align="right", , ,
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
, , , - , Kunyit , , stratovolcano , , align="right", , , unknown , , , - , Pendan , , unknown , , align="right", unknown , , unknown , , , - , Belirang-Beriti , , complex volcano , , align="right", , , unknown , , , - ,
Bukit Daun Bukit Daun (, means: ''Leaves Hill'') is a stratovolcano, located in a sparsely populated region in Sumatra, Indonesia. A 600 m wide of crater lake is located at the summit. A smaller crater lake, Tologo Kecil, is found in the south-west flan ...
, , stratovolcano , , align="right", , , unknown , , , - , Kaba , , stratovolcano , , align="right", , , (1) , , , - , Dempo , , stratovolcano , , align="right", , , 2018 (1) , , , - , Patah , , unknown , , align="right", , , unknown , , , - , Bukit Lumut Balai , , stratovolcano , , align="right", , , unknown , , , - , Besar , , stratovolcano , , align="right", , , (1) , , , - , Ranau , ,
caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
, , align="right", , , unknown , , , - , Sekincau Belirang , , caldera , , align="right", , , unknown , , , - , Suoh , , caldera , , align="right", , , (4) , , , - , Hulubelu , , caldera , , align="right", , , , , , - ,
Rajabasa Rajabasa is an isolated 1281-m-high conical volcano along the Sunda Strait at the most southeastern point of Sumatra. It has a well-preserved 500 x 700 m summit crater with a swampy floor. The volcano is covered with vegetation. Although fumarol ...
, , stratovolcano , , align="right", , , , ,


Sunda Strait and Java

The
Sunda Strait The Sunda Strait ( id, Selat Sunda) is the strait between the Indonesian islands of Java and Sumatra. It connects the Java Sea with the Indian Ocean. Etymology The strait takes its name from the Sunda Kingdom, which ruled the western portion o ...
separates the islands of Sumatra and
Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
with the volcanic island
Krakatoa Krakatoa (), also transcribed (), is a caldera in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung. The caldera is part of a volcanic island group ( Krakatoa archipelago) comprising four islands. T ...
lying between them. Krakatau erupted violently in 1883, destroying two-thirds of the island and leaving a large
caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
under the sea. This cataclysmic explosion was heard as far away as the island of
Rodrigues Rodrigues (french: Île Rodrigues, link=yes ; Creole: ) is a autonomous outer island of the Republic of Mauritius in the Indian Ocean, about east of Mauritius. It is part of the Mascarene Islands, which include Mauritius and Réunion. R ...
near
Mauritius Mauritius ( ; french: Maurice, link=no ; mfe, label= Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It ...
(approx. away). A new parasitic cone, called Anak Krakatau (or the child of Krakatau), rose from the sea at the centre of the caldera in 1930. The other Krakatau
islet An islet is a very small, often unnamed island. Most definitions are not precise, but some suggest that an islet has little or no vegetation and cannot support human habitation. It may be made of rock, sand and/or hard coral; may be permanen ...
s from the 1883 eruptions are known as Sertung, Panjang and Rakata. Java is a relatively small island compared to Sumatra, but it has a higher concentration of active volcanoes. There are 45 active volcanoes on the island excluding 20 small
crater Crater may refer to: Landforms * Impact crater, a depression caused by two celestial bodies impacting each other, such as a meteorite hitting a planet * Explosion crater, a hole formed in the ground produced by an explosion near or below the surf ...
s and cones in the
Dieng volcanic complex The Dieng Volcanic Complex ( jv, ꦢꦶꦲꦾꦁ, Dihyang) is a volcanic complex located on the Dieng Plateau in the Central Java, Indonesia, a complex of volcanoes. The volcanic complex consists of two or more of stratovolcanoes, more than 20 sm ...
and the young cones in the Tengger caldera complex. Some volcanoes are grouped together in the list below because of their close location.
Mount Merapi Mount Merapi, ''Gunung Merapi'' (literally Fire Mountain in Indonesian and Javanese), is an active stratovolcano located on the border between the province of Central Java and the Special Region of Yogyakarta, Indonesia. It is the most ac ...
, Semeru and Kelud are the most active volcanoes in Java. Mount Semeru has been continuously erupting since 1967. Mount Merapi has been named as one of the
Decade Volcanoes The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) as being worthy of particular study in light of their history of large, destructive eruptions and p ...
since 1995.
Ijen Map of Ijen Crater, where sulfur is mined The Ijen volcano complex is a group of composite volcanoes located on the border between Banyuwangi Regency and Bondowoso Regency of East Java, Indonesia. It is known for its blue fire, acidic crate ...
has a unique colourful
caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
lake which is an extremely acidic natural reservoir ( pH<0.3). There are sulfur mining activities at Ijen, where miners collect highly concentrated sulfur rocks by hand. Note: Height of Krakatau is of Rakata, not of the active Anak Krakatau


Lesser Sunda Islands

The
Lesser Sunda Islands The Lesser Sunda Islands or nowadays known as Nusa Tenggara Islands ( id, Kepulauan Nusa Tenggara, formerly ) are an archipelago in Maritime Southeast Asia, north of Australia. Together with the Greater Sunda Islands to the west they make up ...
is a small
archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or sometimes a sea containing a small number of scattered islands. Examples of archipelagos include: the Indonesian Arch ...
which, from west to east, consists of
Bali Bali () is a province of Indonesia and the westernmost of the Lesser Sunda Islands. East of Java and west of Lombok, the province includes the island of Bali and a few smaller neighbouring islands, notably Nusa Penida, Nusa Lembongan, and ...
, Lombok, Sumbawa,
Flores Flores is one of the Lesser Sunda Islands, a group of islands in the eastern half of Indonesia. Including the Komodo Islands off its west coast (but excluding the Solor Archipelago to the east of Flores), the land area is 15,530.58 km2, and t ...
,
Sumba Sumba ( id, Pulau Sumba) is an island in eastern Indonesia. It is one of the Lesser Sunda Islands and is in the province of East Nusa Tenggara. Sumba has an area of , and the population was 779,049 at the 2020 Census; the official estimate as a ...
and the
Timor Timor is an island at the southern end of Maritime Southeast Asia, in the north of the Timor Sea. The island is divided between the sovereign states of East Timor on the eastern part and Indonesia on the western part. The Indonesian part, ...
islands; all are located at the edge of the Australian continental shelf. Volcanoes in the area are formed because of
oceanic crust Oceanic crust is the uppermost layer of the oceanic portion of the tectonic plates. It is composed of the upper oceanic crust, with pillow lavas and a dike complex, and the lower oceanic crust, composed of troctolite, gabbro and ultramafic ...
s and the movement of the shelf itself. Some volcanoes completely form an island, for instance, the Sangeang Api island.
Mount Tambora Mount Tambora, or Tomboro, is an active stratovolcano in West Nusa Tenggara, Indonesia. Located on Sumbawa in the Lesser Sunda Islands, it was formed by the active subduction zones beneath it. Before 1815, its elevation reached more than ...
, on Sumbawa island, erupted on 5 April 1815, with a scale 7 on the VEI and is considered the most violent eruption in recorded history.


Banda Sea

The Banda Sea in the south of the Molucca archipelago includes a small
group of islands An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or sometimes a sea containing a small number of scattered islands. Examples of archipelagos include: the Indonesian Archi ...
. Three major
tectonic plate Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large te ...
s beneath the sea,
Eurasian Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipela ...
, Pacific and
Indo-Australian all of this entry re immigration is a complete fabrication Indian Australians or Indo-Australians are Australians of Indian ancestry. This includes both those who are Australian by birth, and those born in India or elsewhere in the Indian ...
plates, have been converging since the
Mesozoic The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretace ...
epoch. Volcanoes in the Banda Sea are mainly
island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An isla ...
s, but some are
submarine volcano Submarine volcanoes are underwater vents or fissures in the Earth's surface from which magma can erupt. Many submarine volcanoes are located near areas of tectonic plate formation, known as mid-ocean ridges. The volcanoes at mid-ocean ri ...
es.


Sulawesi and Sangihe Islands

Four
peninsula A peninsula (; ) is a landform that extends from a mainland and is surrounded by water on most, but not all of its borders. A peninsula is also sometimes defined as a piece of land bordered by water on three of its sides. Peninsulas exist on a ...
s dominate the shape of
Sulawesi Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu ...
island (formerly known as Celebes). The central part is a high mountainous area, but mostly non-volcanic. Active volcanoes are found in the northern peninsula and continuously stretch to the north to
Sangihe Islands The Sangihe Islands (also spelled "Sangir", "Sanghir" or "Sangi") – id, Kepulauan Sangihe – are a group of islands which constitute two regencies within the province of North Sulawesi, in northern Indonesia, the Sangihe Islands R ...
. The Sangihe Islands mark the border with the
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
.


Halmahera

Halmahera Halmahera, formerly known as Jilolo, Gilolo, or Jailolo, is the largest island in the Maluku Islands. It is part of the North Maluku province of Indonesia, and Sofifi, the capital of the province, is located on the west coast of the island. Ha ...
island in the north of Molucca archipelago has been formed by the movement of three
tectonic plates Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large ...
resulting in two intersecting mountain ranges, which form four rocky peninsulas separated by three deep bays. A volcanic arc stretches from north to south in the west side of Halmahera, some of which are
volcanic island Geologically, a high island or volcanic island is an island of volcanic origin. The term can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs (which have often formed ...
s, for instance,
Gamalama Gamalama is a near-conical stratovolcano that comprises the entire Ternate island in Indonesia. The island lies off the western shore of Halmahera island in the north of the Maluku Islands. For centuries, Ternate was a center of Portuguese and Du ...
and Tidore. Gamalama's island name is Ternate and it has been the centre for spice trading since the
Portuguese Empire The Portuguese Empire ( pt, Império Português), also known as the Portuguese Overseas (''Ultramar Português'') or the Portuguese Colonial Empire (''Império Colonial Português''), was composed of the overseas colonies, factories, and the ...
opened a fort in 1512. Due to its location as the centre for spice trading during the
Age of Discovery The Age of Discovery (or the Age of Exploration), also known as the early modern period, was a period largely overlapping with the Age of Sail, approximately from the 15th century to the 17th century in European history, during which seafa ...
, historical records of volcanic eruptions in Halmahera have been available as far back as the early 16th century.


Major eruptions

Below is a list of selected major eruptions of volcanoes in Indonesia, sorted chronologically by the starting date of the eruption. Only eruptions with scale 3 or above on VEI are given with known sources and fatalities, except if smaller scale eruptions resulted some fatalities. Notes: cv=central vent eruption, pf=
pyroclastic flow A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of b ...
s, lf=
lava flow Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or un ...
s, lm=
lahar A lahar (, from jv, ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water. The material flows down from a volcano, typically along a river valley. Lahars are extr ...
mudflows, cl= crater lake eruption, ph=
phreatic eruption A phreatic eruption, also called a phreatic explosion, ultravulcanian eruption or steam-blast eruption, occurs when magma heats ground water or surface water. The extreme temperature of the magma (anywhere from ) causes near-instantaneous evap ...
, ld= lava dome extrusion, cc=
caldera collapse A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
, se= submarine eruption, fa= fumarole activity, rf=radial fissure eruption.


See also

*
List of earthquakes in Indonesia __NOTOC__ This is an incomplete list of more recent recorded major earthquakes that have occurred within the boundaries of Indonesia. The determinants of the activity are indicated by the geology of the region, and the volcanic activity. Large nu ...
* Lists of volcanoes *
List of disasters in Indonesia The following is a list of disasters in Indonesia that have had widespread effects or received substantial attention. It is split into natural and manmade disasters, which includes deliberate actions, and is further sorted by date. Natural disaste ...
* Volcanism of Indonesia * Volcanism of Java *
List of Ultras of the Malay Archipelago This is a list of ultra prominent peaks (with topographic prominence greater than 1,500 metres) in the Malay Archipelago, a group of over 25,000 islands which includes Brunei, Singapore, East Malaysia, Indonesia, the Philippines and East Timor. H ...


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Volcanological Survey Indonesia

Indonesian Volcanoes and mountains of Indonesia
Volcanoes A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates a ...
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Gui ...
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