Leroboleng

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 8.358°S
  • 122.842°E

  • 1117 m
    3664 ft

  • 264200
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

23 July-29 July 2003

Based on an aircraft report, the Darwin VAAC reported that an eruption from Leroboleng on 29 July at 0900 lasted 10 minutes and produced an ash cloud to a height of ~7.3 km a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Index of Weekly Reports


2003: June | July

Weekly Reports


23 July-29 July 2003

Based on an aircraft report, the Darwin VAAC reported that an eruption from Leroboleng on 29 July at 0900 lasted 10 minutes and produced an ash cloud to a height of ~7.3 km a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


9 July-15 July 2003

Based on a pilot's report, the Darwin VAAC reported that an ash plume was visible above Leroboleng on 14 July at 1606 at a height of`~2.5 km. Ash was not visible on satellite imagery and VSI personnel could not observe the volcano.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


25 June-1 July 2003

Based on information from an aircraft report, the Darwin VAAC reported that an ash plume from Leroboleng rose to ~1.8 km a.s.l. on 26 June. Ash was not visible on satellite imagery. Leroboleng has not erupted since the 19th century, and results from ground observations are pending.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


Index of Monthly 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.

07/2003 (BGVN 28:07) June-July ash plumes reported by pilots may be the first eruptions in 122 years


Contents of Monthly Reports

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

07/2003 (BGVN 28:07) June-July ash plumes reported by pilots may be the first eruptions in 122 years

The Darwin Volcanic Ash Advisory Center (VAAC) provided a series of pilot reports on Leroboleng. Confirmation from observers on the ground are pending.

At 1038 on 26 June 2003 aviators reportedly saw an ash plume rise to ~1.8 km altitude. An aircraft crew advised that the activity appeared to be increasing. Ash was not visible on satellite imagery. Another report stated that an ash plume was visible above Leroboleng at 1606 on 14 July at ~2.5 km altitude. Ash was not visible on satellite imagery and at that time VSI personnel could not observe the volcano. An alleged eruption on 29 July at 0900 lasted 10 minutes and sent an ash cloud to ~7.3 km altitude.

Information Contacts: Darwin Volcanic Ash Advisory Centre (VAAC), Bureau of Meteorology, Northern Territory Regional Office, PO Box 40050, Casuarina, NT 0811, Australia (URL: http://www.bom.gov.au/info/vaac/).

Leroboleng volcano, also known as Lereboleng or Lewono, lies at the eastern end of a 4.5-km-long, WSW-ESE-trending chain of three volcanoes straddling a narrow peninsula in NE Flores Island. The summit of Gunung Leroboleng contains 29 small fissure-controlled craters, two containing lakes. A small lava dome occupies one of the craters. Most of the craters originated along three N-S-trending fissures immediately east of the summit of the volcano. The largest crater, 250-m-wide Ili Gelimun, is located SSE of the summit and fed lava flows from a lower south-flank vent. Explosive eruptions were reported from Burak crater during the 19th century.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2003 Jun 26 2003 Jul 29 Confirmed 3 Historical Observations
1881 Mar 16 Unknown Confirmed 2 Historical Observations Burak (Kawah XXVII)
1876 Unknown Confirmed 2 Historical Observations Burak (Kawah XXVI)
1873 Unknown Confirmed 2 Historical Observations Burak (Kawah XXIV)

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
Lewono | Leweno | Iliburak | Lereboleng | Leweroh | Lewero | Leworoh


Craters
Feature Name Feature Type Elevation Latitude Longitude
Burak Crater 945 m
Gelimun
    Gelimoen
Crater 967 m
The summit of Leroboleng volcano contains 29 small fissure-controlled craters, two containing lakes; a small lava dome occupies one of the craters. Leroboleng volcano is also known as Lereboleng or Lewono and lies at the eastern end of a 4.5-km-long, WSW-ESE-trending chain of three volcanoes straddling a narrow peninsula in NE Flores Island. Most of the craters originated along three N-S-trending fissures immediately east of the summit of the volcano.

Photo by Volcanological Survey of Indonesia.

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.

Kemmerling G L L, 1929. Vulkanen van Flores. Vulk Seism Meded Dienst Mijnw Ned-Indie, 10: 1-138.

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.

Sudradjat A, 1977. . (pers. comm.).

Volcano Types

Complex

Tectonic Setting

Subduction zone
Crustal thickness unknown

Rock Types

Major
Andesite / Basaltic Andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
9,164
26,794
358,627
896,194

Affiliated Databases

Large Eruptions of Leroboleng 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.