Poco Leok

No photo available for this volcano
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  • Indonesia
  • Indonesia
  • Stratovolcano
  • Unknown - Unrest / Holocene
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 8.68°S
  • 120.48°E

  • 1675 m
    5494 ft

  • 264070
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Poco Leok.

The Global Volcanism Program has no Weekly Reports available for Poco Leok.

The Global Volcanism Program has no Bulletin Reports available for Poco Leok.

Poco Leok volcano in western Flores Island was constructed with an irregular 7-km-wide caldera of uncertain origin. No pyroclastic-flow deposits are associated with the "caldera," which is poorly known geologically (Casadevall, 1989, pers. comm.). Poco Leok volcano was constructed within the caldera, culminating in the eruption of an andesite lava within the crater area. Volcanism is of Quaternary age (van Bemmelen, 1949b), and four fumarole fields are located at elevations of 825-1200 m within the depression. The Ulumbu geothermal field is located on the flank of Poco Leok at 650 m elevation and includes hot springs, fumaroles, mud pots, and steaming ground.

The Global Volcanism Program is not aware of any Holocene eruptions from Poco Leok. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Poco Leok page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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
Potjo Leok | Potjok Leok


Cones
Feature Name Feature Type Elevation Latitude Longitude
Poco Rii Stratovolcano


Thermal
Feature Name Feature Type Elevation Latitude Longitude
Ine Rua Thermal
Kokor, Wai Thermal
Mucu
    Mutju
Thermal
Ulumbu Thermal 650 m
Wara, Wai Thermal

The Global Volcanism Program has no photographs available for Poco Leok.

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.

Casadevall T J, 1989. . (pers. comm.).

Kasbani, Browne P R L, Johnstone R D, Kahsai K, Utami P, Wangge A, 1997. Subsurface hydrothermal alteration in the Ulumbu geothermal field, Flores, Indonesia. Proc 22nd Workshop Geotherm Res Eng, Stanford Univ, 1997, 7 p.

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

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

Sulasdi D, 1996. Exploration of Ulumbu geothermal field, Flores-East Nusa Tenggara Indonesia. Proc 21st Workshop Geotherm Res Eng, Stanford Univ, Jan 22-24, 1996, SGP-TR-151: 51-54.

van Bemmelen R W, 1949b. The Geology of Indonesia. The Hague: Government Printing Office, v 1, 732 p.

Volcano Types

Stratovolcano
Caldera

Tectonic Setting

Subduction zone
Crustal thickness unknown

Rock Types

Major
Andesite / Basaltic Andesite
Dacite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
653
47,055
270,617
862,807

Affiliated Databases

Large Eruptions of Poco Leok 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.