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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. Minor ash emissions in 1892 marked the only historical eruption from Conchagüita, the easternmost Holocene volcano in El Salvador.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1892 Oct 12 (?)||1892 Oct 31 (?)||Confirmed||1||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.
|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. Minor ash emissions in 1892 were the only historical eruptions from Conchagüita.
Copyrighted photo by Tom Coafford, 1973, courtesy of Dick Stoiber (Dartmouth College).
|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).
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
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.
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.