Global Volcanism Program

The Global Volcanism Program has no activity reports available for Conchagüita.

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

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

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

Conchagua Island

Basic Data

Volcano Number

Last Known Eruption

Elevation

Latitude
Longitude

343120

Pleistocene

505 m / 1,657 ft

13.229°N
87.767°W

Morphology

Volcano Landform
Composite

Volcano Types
Stratovolcano

Rock Types

Major
Basalt / Picro-Basalt

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Population

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

1,076
5,575
172,113
2,625,176

Geological Summary

Conchagüita volcano occupies a small, 4-km-wide island in the Gulf of Fonseca across a narrow strait from Conchagua volcano. Late-stage eruptions formed a small, sharp-topped cone with a 100-m-wide summit crater at the southern end of the low 505-m-high island, and a youthful peninsula also extends from the island's eastern side. A crescent-shaped crater open to the west is located at the northern end of the island.

References

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

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. https://doi.org/10.3190/jgeosci.069

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.

Williams H, Meyer-Abich H, 1955. Volcanism in the southern part of El Salvador with particular reference to the collapse basins of Lakes Coatepeque and Ilopango. Univ Calif Pub Geol Sci, 32: 1-64.

Eruptive History

The Global Volcanism Program is not aware of any Holocene eruptions from Conchagüita. If this volcano has had large eruptions (VEI >= 4) prior to 12,000 years ago, information might be found on the Conchagüita page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

Deformation History

There is no Deformation History data available for Conchagüita.

Emission History

There is no Emissions History data available for Conchagüita.

Photo Gallery

Islands dot the Gulf of Fonseca in this NE-looking view from Cerro el Havillal on Isla Conchagüita. Isla Conchagüita is a small, 4-km-wide island across a narrow strait from Conchagua volcano. Late-stage eruptions formed a small, sharp-topped cone with a 100-m-wide summit crater at the southern end of the island. A crescent-shaped crater open to the west is located at the northern end of the island.

Photo by Tom Crafford, 1973 (Dartmouth College, courtesy of Dick Stoiber).

Conchagüita (left), an island in the Gulf of Fonseca, and Conchagua (right) a volcano on the Salvadoran mainland are seen here across the Gulf of Fonseca from the NE on the island of Zacate Grande in Honduras. Both Conchagüita and Conchagua are extensively eroded, but a historical eruption was reported from Conchagüita. The NW flank of Isla El Tigre volcano forms the ridge extending into the sea at the extreme left.

Photo by Mike Carr, 1991 (Rutgers University).

Conchagüita volcano occupies a small, 4-km-wide island in the Gulf of Fonseca across a narrow strait from Conchagua volcano. Conchagüita is seen here from Punta El Chiquirín, the easternmost point on the Salvadoran mainland. Late-stage eruptions formed a small, sharp-topped cone with a 100-m-wide summit crater at the southern end of the low 550-m-high island. Minor ash emissions in 1892 marked the only reported historical eruption from Conchagüita. Meanguera Island can be seen beyond Conchagüita at the left.

Photo by Francesco Frugioni, 1999 (Istituto Nazionale di Geofisca e Vulcanologia, Rome).

Conchagüita (right) and Meanguera (left) volcanoes lie across a narrow strait from Punta El Chiquirín in eastern El Salvador. Conchagüita is the youngest of the two small volcanic islands in the Gulf of Fonseca and had an historical eruption in 1892. The more eroded Isla Meanguera volcano ceased activity during the Pleistocene.

Photo by Giuseppina Kysar, 1999 (Smithsonian Institution).

GVP Map Holdings

Maps are not currently available due to technical issues.

Smithsonian Sample Collections Database

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

External Sites

Copernicus Browser

The Copernicus Browser replaced the Sentinel Hub Playground browser in 2023, to provide access to Earth observation archives from the Copernicus Data Space Ecosystem, the main distribution platform for data from the EU Copernicus missions.

WOVOdat
   Single Volcano View
   Temporal Evolution of Unrest
   Side by Side Volcanoes

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.

GVMID Data on Volcano Monitoring Infrastructure The Global Volcano Monitoring Infrastructure Database GVMID, is aimed at documenting and improving capabilities of volcano monitoring from the ground and space. GVMID should provide a snapshot and baseline view of the techniques and instrumentation that are in place at various volcanoes, which can be use by volcano observatories as reference to setup new monitoring system or improving networks at a specific volcano. These data will allow identification of what monitoring gaps exist, which can be then targeted by remote sensing infrastructure and future instrument deployments.

IRIS seismic stations/networks

Incorporated Research Institutions for Seismology (IRIS) Data Services map showing the location of seismic stations from all available networks (permanent or temporary) within a radius of 0.18° (about 20 km at mid-latitudes) from the given location of Conchagüita. Users can customize a variety of filters and options in the left panel. Note that if there are no stations are known the map will default to show the entire world with a "No data matched request" error notice.

UNAVCO GPS/GNSS stations

Geodetic Data Services map from UNAVCO showing the location of GPS/GNSS stations from all available networks (permanent or temporary) within a radius of 20 km from the given location of Conchagüita. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player.

Large Eruptions of Conchagüita

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).

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).