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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 13.275°N
  • 87.845°W

  • 1225 m
    4018 ft

  • 343110
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Conchagua.

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

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

Basic Data

Volcano Number

Last Known Eruption




1225 m / 4018 ft


Volcano Types


Rock Types

Basalt / Picro-Basalt
Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone
Continental crust (> 25 km)


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

Geological Summary

Conchagua (also known as Cochague) is a conical edifice consisting of two overlapping stratovolcanoes, Ocotal and Banderas, overlooking the Gulf of Fonseca at the SE tip of El Salvador. It is elongated WSW-ENE, and the eastern and southern flanks descend into the sea. Cerro de La Banderas has a large horseshoe-shaped crater open to the NE, and though it appears younger, Ar-Ar dating by Quezada and Garcia (2008) was 0.41 +/- 0.1 Ma. To the WSW, the slightly higher Cerro del Ocotal, at 1225 m, was dated at 0.15 +/- 0.02 Ma. Ocotal has multiple peaks and the flanks are more dissected. Eruptions reported for the years 1522, 1688, 1868, 1892, and 1947 are erroneous, and may refer to landslides associated with earthquakes, an interpretation supported by Rapprich et al. (2010).


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

Carr M J, 1984. Symmetrical and segmented variation of physical and geochemical characterisitics of the Central American volcanic front. J Volc Geotherm Res, 20: 231-252.

Mooser F, Meyer-Abich H, McBirney A R, 1958. Central America. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 6: 1-146.

Rapprich V, Erban V, Farova K, Kopackova V, Bellon H, Hernandez W, 2010. Volcanic history of the Conchagua Peninsula (eastern El Salvador). Journal of Geosciences, 55, 95–112.

Sapper K, 1925. The Volcanoes of Central America. Halle: Verlag Max Niemeyer, 144 p.

Weber H S, Wiesemann G, 1978. Mapa Geologico de la Republica de El Salvador/America Central. Bundesanstalt fur Geowissenschaften und Rohstoffe, Hannover, Germany, 1:100,000 scale geologic map in 6 sheets.

The Global Volcanism Program is not aware of any Holocene eruptions from Conchagua. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Conchagua 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.




Feature Name Feature Type Elevation Latitude Longitude
Banderas Stratovolcano 1133 m 13° 16' 48" N 87° 49' 44" W
Ocotal Stratovolcano 1225 m 13° 16' 30" N 87° 50' 42" W

The Global Volcanism Program has no photographs available for Conchagua.

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of Conchagua 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.