Peuet Sague

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 4.914°N
  • 96.329°E

  • 2801 m
    9187 ft

  • 261030
  • Latitude
  • Longitude

  • Summit
    Elevation

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    Number

Most Recent Weekly Report: 10 January-16 January 2001


The VSI reported two explosions at Peuet Sague on 25 December, and another the next day. The explosions deposited ash over a wide area including villages 20 km from the summit. As of about 8 January lava flows were visible at the volcano from Trans village, 7 km away. The volcano is at Alert Level 2 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)


Most Recent Bulletin Report: January 2001 (BGVN 26:01)


1999 activity continues through 14 June; explosions in late December 2000

Peuet Sague's 1999 activity (BGVN 24:05) was reported to have continued, although at a decreased level, through 14 June 1999. A malfunctioning seismograph prevented instrumental monitoring in late May, but thin white gas-and-steam plumes that rose ~15 m were visible. During the first week in June plumes continued to rise to heights of 20 m. Rumbling was heard on 18 occasions, and plumes continued to rise through 14 June.

The VSI did not release further reports until renewed activity began at 0800 on 25 December 2000 with the first of three explosions. A second explosion occurred at 1310, and a third one followed at 1130 on 26 December. The explosions generated ash that spread over a relatively large area. Ashfall occurred on Geumpang, Lutung, Mane, and Bangke villages up to 20 km away. An observer from the village of Trans reported having seen glowing lava flows at night. Reported emissions ceased for the remainder of 2000, and the hazard status stayed at 2 (on a scale of 1-4).

Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (Email: dali@vsi.esdm.go.id, URL: http://www.vsi.esdm.go.id/).

Index of Weekly Reports


2001: January

Weekly Reports


10 January-16 January 2001

The VSI reported two explosions at Peuet Sague on 25 December, and another the next day. The explosions deposited ash over a wide area including villages 20 km from the summit. As of about 8 January lava flows were visible at the volcano from Trans village, 7 km away. The volcano is at Alert Level 2 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)


Index of Bulletin Reports


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

04/1998 (BGVN 23:04) Pilots spot ash erupting from remote volcano in N Sumatra beginning in late April

05/1999 (BGVN 24:05) March-May activity initially increased and later slackened; minor ash emissions

01/2001 (BGVN 26:01) 1999 activity continues through 14 June; explosions in late December 2000




Bulletin Reports

All information contained in these reports is preliminary and subject to change.


04/1998 (BGVN 23:04) Pilots spot ash erupting from remote volcano in N Sumatra beginning in late April

An eruption of Mount Peuet Sague, in a remote part of northern Sumatra, was first seen the morning of 26 April by pilots. Indonesia's Antara news agency reported on 27 April that a pilot of the national airline, Garuda, saw a volcano erupting in the province of Aceh, in the Pidie area. The report said the pilot saw ash to an altitude of ~3 km as he flew over at ~7 km altitude. The report also quoted the local Air Force chief as saying a fighter pilot spotted fire and thick smoke issuing from the mountain. It was the second recent eruption there: the first, on 19 April, was obscured by thick smoke from forest fires.

Officials at the Ministry of Mines and Energy, which has responsibility for monitoring volcanic activity in Aceh Province, reported a phreatic eruption. The active crater is near Mount Tutung, 2 km W of the peak of Peuet Sague. The nearest village sits 8 km W of the eruption center. No one was harmed and it appears few noticed, as there were no accounts from local residents of sounds, tremors, or ashfall. There were some indications of material ejected from the crater. A 15 May statement said white smoke was weakly issuing from the volcano, but that all other activity had ceased.

Peuet Sague is remote and scientific information is accordingly difficult to collect. VSI observers who went to the area shortly after the latest eruption were delayed because they had to walk nearly four days to reach the volcano. The Mount Peuet Sague Volcano Observatory was initiated at the end of 1997 but had been equipped with neither monitoring devices nor observers at the time of this activity. VSI planned to install one radio telemetric seismograph and to employ one observer by late May 1998.

Background. The name Peuet Sague, which has numerous spelling variants (e.g. Peut Sagoe, Peuet Sagu, Puet Sagu, Peuet Sagoee), means "square." Accordingly, Peuet Sague, a stratovolcano, contains four summit peaks. It is located in Sigli Regency, Aceh Province near Seulawah Agam and Burni Telong volcanoes. The crater believed to be active resides SE of one of the peaks of the lava dome (Mount Tutung). This narrow crater has a diameter of about 70 m and a depth of 80 m.

According to Igan Sutawidjaja, a May 1920 expedition was stopped by heavy ashfall and a 1952 expedition spent 20 days without reaching the volcano. A 1975 team reached the peak after nine days but found no eruptive activity. They documented a lake (500 x 800 m) at the foot of Mount Tutung containing water at a temperature of 19°C. Within Tutung's crater they found a small (40 x 75 m) blue lake with a temperature of 21°C. This intracrater lake was surrounded by four solfataras (with temperatures of 59-78°C).

The last major eruption occurred in 1918-21 when ash was emitted, a lava dome was formed, and pyroclastic flows spilled into surrounding uninhabited forests. Scientists inspecting the summit area in 1984 found burned trees surrounding the main crater, likely due to a 1979 eruption. Local eye-witnesses and pilots reported ash columns above the summit in 1979, 1986, and 1991. An expedition in 1984 found burned trees surrounding the crater, attributed to the 1979 eruption. Uncertain activity was reported in 1949.

Information Contacts: Mahbub Iskandar, Ministry of Mines and Energy, Banda Aceh, Sumatra, Indonesia (Email: depe@aceh.wasantara.net.id); Igan S. Sutawidjaja, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No.57, Bandung 40122, Indonesia (Email: igan@vsi.esdm.go.id, URL: http://www.vsi.esdm.go.id/sague/geninfo.html); Reuters News Agency; Associated Press.

05/1999 (BGVN 24:05) March-May activity initially increased and later slackened; minor ash emissions

During 9 March-24 May activity initially increased but later diminished. Volcanic activity increased during 9-15 March and people in the local settlement heard booming noises about 20 times/day. From 16 to 22 March, volcanic activity continued at the same scale, but the booming noises weakened. The seismic record also illustrated decreased intensity. Activity continued through the week of 23-29 March without diminishing, but the booming noises ceased. Volcanic and tectonic events increased, with volcanic type-B earthquakes rising from 6 to 15 and tectonic events increasing from 1 to 18. From 27 April to 3 May volcanic earthquakes increased and an eruption emitted white-gray ash to 200 m.

Activity began tapering during 4-10 May. A white plume was observed at heights of 10-20 m. Volcanic shocks decreased. Activity continued to decline during 11-17 May, with a plume ranging from 10 to 200 m heights. Volcanic activity was not recorded during 18-24 May, but observers reported 14 "thin white ash plumes" rising 10-50 m.

The Peuet Sague stratovolcano contains four summit peaks. The crater believed to be active resides SE of one of the peaks of the lava dome (Mount Tutung). This narrow crater has a diameter of about 70 m and a depth of 80 m. The last major eruption occurred in 1918-21 when ash was emitted, a lava dome was formed, and pyroclastic flows spilled into surrounding uninhabited forests. A 1975 team that reached the peak found no eruptive activity, but documented a lake (500 x 800 m) at the foot of Mount Tutung. Within Tutung's crater they found a small (40 x 75 m) blue lake surrounded by four solfataras. Scientists inspecting the summit area in 1984 found burned trees surrounding the main crater, likely due to a 1979 eruption. Local eyewitnesses and pilots reported ash columns above the summit in 1979, 1986, and 1991.

Information Contacts: Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).

01/2001 (BGVN 26:01) 1999 activity continues through 14 June; explosions in late December 2000

Peuet Sague's 1999 activity (BGVN 24:05) was reported to have continued, although at a decreased level, through 14 June 1999. A malfunctioning seismograph prevented instrumental monitoring in late May, but thin white gas-and-steam plumes that rose ~15 m were visible. During the first week in June plumes continued to rise to heights of 20 m. Rumbling was heard on 18 occasions, and plumes continued to rise through 14 June.

The VSI did not release further reports until renewed activity began at 0800 on 25 December 2000 with the first of three explosions. A second explosion occurred at 1310, and a third one followed at 1130 on 26 December. The explosions generated ash that spread over a relatively large area. Ashfall occurred on Geumpang, Lutung, Mane, and Bangke villages up to 20 km away. An observer from the village of Trans reported having seen glowing lava flows at night. Reported emissions ceased for the remainder of 2000, and the hazard status stayed at 2 (on a scale of 1-4).

Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (Email: dali@vsi.esdm.go.id, URL: http://www.vsi.esdm.go.id/).

Peuet Sague is a large volcanic complex that rises to 2801 m in NW Sumatra. The volcano, whose name means "square," contains four summit peaks, with the youngest lava dome being located to the north or NW. This extremely isolated volcano lies several days journey on foot from the nearest village and is infrequently visited. The first recorded historical eruption took place from 1918-21, when explosive activity and pyroclastic flows accompanied summit lava-dome growth. The historically active crater is located SE of the Gunung Tutung lava dome and has typically produced small-to-moderate explosive eruptions.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2000 Dec 25 2000 Dec 26 (in or after) Confirmed 2 Historical Observations
1999 Mar 9 (?) 1999 Apr 30 ± 3 days Confirmed 1 Historical Observations
1998 Apr 19 1998 Apr 26 (?) Confirmed 1 Historical Observations
1991 Unknown Confirmed 2 Historical Observations
1986 Unknown Confirmed 2 Historical Observations
1979 Unknown Confirmed 2 Historical Observations
1918 1921 Confirmed 2 Historical Observations

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Synonyms

Puet Sagu | Peut Sagoe | Peuet Sagoee

Domes

Feature Name Feature Type Elevation Latitude Longitude
Tutung, Gunung Dome 2435 m 4° 54' 0" N 96° 17' 0" E
Thin clouds drape one of four summit peaks of Peuet Sague volcano in NW Sumatra. This infrequently visited volcano lies several days' journey on foot from the nearest village. The first recorded historical eruption took place during 1918-21, when explosive activity and pyroclastic flows accompanied summit lava dome growth.

Photo by Sumarma Hamidi, 1975 (Volcanological Survey of Indonesia).
Vegetation drapes one of the four peaks forming the summit of Peuet Sague volcano in NW Sumatra. This extremely isolated volcano lies several days' journey on foot from the nearest village and is infrequently visited. The first recorded historical eruption took place during 1918-21, when explosive activity and pyroclastic flows accompanied summit lava dome growth.

Photo by R.D. Erfan (Volcanological Survey of Indonesia).
The steep-walled summit crater of Peuet Sague is part of a large volcanic complex that rises to 2801 m in NW Sumatra. The volcano, whose name means "square," contains four summit peaks, with the youngest lava dome being located to the north or NW. The first recorded historical eruption took place from 1918-21, when explosive activity and pyroclastic flows accompanied summit lava-dome growth. The historically active crater has typically produced small-to-moderate explosive eruptions.

Copyrighted photo by Michael Thirbeck, 1997.

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Kaswanda O, Said H, Rahardja N, 1987. . (pers. comm.).

Kusumadinata K, 1979. Data Dasar Gunungapi Indonesia. Bandung: Volc Surv Indonesia, 820 p.

Neumann van Padang M, 1951. Indonesia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 1: 1-271.

Rock N M S, Syah H H, Davis A E, Hutchison D, Styles M T, Lena R, 1982. Permian to Recent volcanism in northern Sumatra, Indonesia: a preliminary study of its distribution, chemistry, and peculiarities. Bull Volc, 45: 127-152.

Volcano Types

Complex
Lava dome(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Andesite / Basaltic Andesite
Dacite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
53
144
16,227
1,862,448

Affiliated Databases

Large Eruptions of Peuet Sague Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.