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  • Indonesia
  • Indonesia
  • Lava cone
  • Unknown - Evidence Uncertain
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 2.156°N
  • 98.934°E

  • 1503 m
    4930 ft

  • 261101
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Imun.

The Global Volcanism Program has no Weekly Reports available for Imun.

The Global Volcanism Program has no Bulletin Reports available for Imun.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Uncertain

1503 m / 4930 ft


Volcano Types

Lava cone

Rock Types


Tectonic Setting

Subduction zone
Continental crust (> 25 km)


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

Geological Summary

Imun is a single small dacitic and/or rhyolitic cone south of Lake Toba with a youthful, undissected morphology, and is considered to be of late-Pleistocene or Holocene age (Aldiss et al., 1983). Nukman and Moeck (2013, reproduced in Niasari, 2015) mapped Imun as Pleistocene.


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

Aldiss D T, Whandoyo R, Ghazali S A, Kusyono, 1983. Geologic map of the Sidikalang and (part of) Sinabang quadrangles, Sumatra. Geol Res Devel Centre Indonesia, 1:250,000 scale map and 41 p text.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Niasari S W, 2015. Magnetotelluric Investigation of the Sipoholon Geothermal Field, Indonesia. Dissertation zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) im Fachbereich Geowissenschaften der Freien Universität Berlin.

Nukman M, Moeck I, 2013. Structural controls on a geothermal system in the Tarutung Basin, North Central Sumatra. Journal of Asian Earth Sciences 74:86–96.

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

The Global Volcanism Program has no synonyms or subfeatures listed for Imun.

The Global Volcanism Program has no photographs available for Imun.

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of Imun 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.