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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 37.144°S
  • 70.033°W

  • 4114 m
    13494 ft

  • 357072
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Tromen.

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

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

Basic Data

Volcano Number

Last Known Eruption



1822 CE

4114 m / 13494 ft


Volcano Types

Pyroclastic cone(s)
Lava dome(s)

Rock Types

Andesite / Basaltic Andesite
Basalt / Picro-Basalt

Tectonic Setting

Subduction zone
Continental crust (> 25 km)


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

Geological Summary

Tromen is an Argentinian stratovolcano that is the primary structure in an elongated volcanic plateau or field that extends about 70 km from Tilhue in the S to Piujenta in the N, including the Boliviano caldera and Palao dome. The summit of Tromen is cut by two overlapping 3.5-km-wide calderas. The Pleistocene Volcán Cerro Negro del Tromen, with a 5-km-wide caldera, lies immediately north, and lava flows have partially overtopped the northern caldera rim. At the SSW end of this N-S-trending chain is Cerro Tilhue, of Pleistocene-Holocene age. Post-caldera vents at Tromen were constructed inside both calderas and on the flanks of the NE-most caldera. The youngest lava flows originated from flank vents and descended the N and NE sides of the andesitic-to-rhyolitic volcanic complex. Holocene vents are also located in the Cerro Michico area on the lower NE flank. Historical eruptions were reported in the mid-18th century and in 1822. Von Wolff (1929) attributed purported eruptions of Pomahuida in 1820, 1823, 1827, 1828 as being from Tromen, but these are not confirmed.


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

Folguera A, Bottesi G, Zapata T, Ramos V A, 2008. Crustal collapse in the Andean backarc since 2 Ma: Tromen volcanic plateau, southern Central Andes (36° 40'-37° 30' S). Tectonophysics, 459: 140-160.

Galland O, Hallot E, Cobbold P R, Ruffet G, de Bremond d'Ars J, 2007. Volcanism in a compressional Andean setting: a structural and geochronological study of Tromen volcano (Neuquen province, Argentina). Tectonics, 26: doi:10.1029/2006TC002011.

Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.

Holmberg E, 1976. Descripcion geologica de la Hoja 32c, Buta Ranquil. Servicio Geol Nac Argentina Bol, 152: 1-86.

Kay S M, Burns W M, Copeland P, Mancilla O, 2006. Upper Cretaceous to Holocene magmatism and evidence for transient Miocene shallowing of the Andean subduction zone under the northern Neuquen basin. In: Kay S M, Ramos V (eds), Evolution of an Andean Margin: A Tectonic and Magmatic View from the Andes to the Neuquen basin (35 deg-39 deg lat.). {Geol Soc Amer Spec Pap}, 407: 19-60.

Von Wolff F, 1929. Der Volcanismus II Band: Spezieller Teil 1 Teil Die Neue Welt (Pazifische Erdhalfte) der Pazifische Ozean und Seine Randgebiete. Stuttgart: Ferdinand Enke, 828 p.

Zollner W, Amos A J, 1973. Descripcion geologica de la Hoja 32b, Chos Malal. Servicio Geol Nac Argentina Bol, 143: 1-91.

Eruptive History

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1822 Unknown Confirmed   Historical Observations
1751 Dec 31 ± 365 days Unknown Confirmed 3 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.


Feature Name Feature Type Elevation Latitude Longitude
Bayo, Cerro Cone 2502 m 37° 10' 0" S 69° 57' 0" W
Buta Mallin Cone 3008 m 36° 54' 46" S 70° 4' 42" W
Michico, Cerro Cone 2000 m 37° 2' 0" S 69° 57' 0" W
Negro del Tromen, Cerro Stratovolcano 3366 m 37° 13' 0" S 70° 2' 0" W
Piujenta Cone 3088 m 36° 45' 12" S 70° 12' 5" W
Polco Cone 2777 m 36° 52' 2" S 70° 8' 2" W
Tilhue, Cerro Stratovolcano 2578 m 37° 17' 0" S 70° 8' 0" W
Wayle Cone 3161 m 37° 3' 11" S 70° 7' 9"


Feature Name Feature Type Elevation Latitude Longitude
Boliviano Caldera 3066 m 36° 48' 27" S 70° 14' 40" W
Pozo, El Crater


Feature Name Feature Type Elevation Latitude Longitude
Palao Dome 3512 m 36° 52' 35" S 70° 16' 39" W


Feature Name Feature Type Elevation Latitude Longitude
Baños, Los Thermal

Photo Gallery

Tromen (center) is a 3978-m-high youthful Argentinian stratovolcano that lies at the northern end of an elongated volcanic massif. The summit of Tromen is cut by two overlapping 3.5-km-wide calderas, visible south of the snow-dappled summit cone in this NASA Landsat view (with north to the top). The youngest lava flows at Tromen originated from north-flanks vents and produced the dark-colored lava flows that blanket the north and NE sides of the andesitic-to-dacitic volcano.

NASA Landsat7 image (
Dark-colored lava flows descend the northern flank of Volcán Tromen, a 3978-m-high Argentinian stratovolcano in this view from La Laguna del Tromen, NW of the volcano. This and another lake at the NW foot the volcano are renowned for their exotic bird life, including flamingos. The youngest lava flows at Tromen originated from flank vents and descended the north and NE sides of the andesitic-to-rhyolitic volcanic complex. Historical eruptions of Tromen were reported in the mid-18th century and in 1822.

Photo by Olivier Galland, 2007 (University of Oslo).

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of Tromen 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.