Peuet Sague is a volcanic complex in the northwestern part 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 ...

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 Guine ...

. The name ''peuet sagoe'' in Acehnese means ''four square''. The location of the volcanic complex is isolated that needs several journeys on foot from the nearest village to reach the mountain. There are four summits in the complex that all of them are located in the Sigli Regency,

Aceh Province Aceh ( ), officially the Aceh Province ( ace, Nanggroë Acèh; id, Provinsi Aceh) is the westernmost province of Indonesia. It is located on the northernmost of Sumatra island, with Banda Aceh being its capital and largest city. Granted a s ...

. One of the

lava dome In volcanology, a lava dome is a circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions on ...

is called Mount Tutung and it has 70 metres (230 feet) diameter and 80 meters (262.5 feet) deep of an active

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 surfac ...

Eruptive History

The first recorded eruption took place between 1918–1921. Due to its remoteness, the volcanic complex is infrequently visited. Little is known about its eruption history prior the 20th century. In the morning of 26 April 1998, an

ash Ash or ashes are the solid remnants of fires. Specifically, ''ash'' refers to all non-aqueous, non- gaseous residues that remain after something burns. In analytical chemistry, to analyse the mineral and metal content of chemical samples, ash ...

eruption was spotted by a pilot of the

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airline. The pilot saw the ash around 3 km (9,840 feet)

altitude Altitude or height (also sometimes known as depth) is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context ...

when he flew over 7 km (23,000 feet) altitude. The local Indonesia Air Force chief confirmed the eruption from a fighter pilot who also spotted fire and thick smoke from the nearby forest. This was actually the second eruption from the first one on 19 April 1998, but the first eruption was obscured by a thick smoke from

forest fire A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of Combustibility and flammability, combustible vegetation. Depending on the type of vegetation present, a wildfire ...

s. Officials from the Ministry of Mines and Energy reported a

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 evapo ...

. The active crater was near Mount Tutung, west of the Peuet Sague's peak. Nobody was injured from this eruption because the nearest village is west of the mountain. Between 9 March 1999 until 24 May 1999, volcanic activity in the Peuet Sague complex increased. Local people heard explosion noises about 20 times per day.

Tectonic Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents k ...

events increased and an eruption emitted white-gray ash up until 200 metres (656 feet) height. A white plume was observed between 10–20 metres (30–65 feet) height. All activities were then diminished. The 1999 activity was later discovered to be continued until late of December 2000, although at a decreased level. The activity monitoring at that time was stopped due to a malfunctioning

seismograph A seismometer is an instrument that responds to ground noises and shaking such as caused by earthquakes, volcanic eruptions, and explosions. They are usually combined with a timing device and a recording device to form a seismograph. The output ...

. Plumes continued to rise in June up to heights of 20 metres. Rumbling was heard on 18 occasions, and plumes continued to rise through 14 June 1999. A renewed activity began on 25 December 2000 with three explosions. Ash was spread over a relatively large area. Reports of ashfall occurred on Geumpang, Lutung, Mane and Bangke villages, up to away. A glowing

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 und ...

s at night was also reported. The 2000 eruption was estimated at scale 2 on Volcanic Explosivity Index.

References

{{DEFAULTSORT:Peuet Sagoe Volcanoes of Sumatra Mountains of Sumatra Complex volcanoes Landforms of Aceh

Eruptive History

See also

References