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

  • Volcano

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.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Unrest / Holocene

1675 m / 5494 ft


Volcano Types


Rock Types

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone
Crustal thickness unknown


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

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 following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

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.

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.


Potjo Leok | Potjok Leok


Feature Name Feature Type Elevation Latitude Longitude
Poco Rii Stratovolcano


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

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

Smithsonian Sample Collections Database

There are no samples for Poco Leok in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

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).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.