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The Global Volcanism Program has no activity reports for Isla Zacate Grande.
The Global Volcanism Program has no Weekly Reports available for Isla Zacate Grande.
The Global Volcanism Program has no Bulletin Reports available for Isla Zacate Grande.
Zacate Grande volcano forms a low 7 x 10 km wide island across a narrow strait from the end of a peninsula surrounded on three sides by the Gulf of Fonseca and Chismuyo bay. At least seven satellitic cones, some of which form small islands offshore, are located from the NE to SE base of the broad 640-m-high basaltic stratovolcano. Some of these, including the symmetrical cone of Isla Gueguensi in the tidal flats about 3 km east of the base of Zacate Grande, are of probable Holocene age (Carr 1992, pers. comm.). In contrast to neighboring Isla El Tigre volcano to the south, Zacate Grande itself is extensively eroded, and deep valleys extend from the summit ridges to the base of the volcano.
The Global Volcanism Program is not aware of any Holocene eruptions from Isla Zacate Grande. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Isla Zacate Grande 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|
|Gueguensi, Isla||Cone||100 m||13° 21' 0" N||87° 34' 0" w|
|Zacate Grande volcano, seen here from Punta el Chiquirín at the eastern tip of El Salvador, forms a low 7 x 10 km wide island across a narrow strait from the end of a peninsula extending into the Gulf of Fonseca. At least seven satellitic cones are located near the base of the 640-m-high dissected basaltic stratovolcano. Some of these, including the symmetrical cone of Isla Gueguensi, are of probable Holocene age. The northern tip of the Salvadoran island of Zacatillo forms the ridge in the center of the photo.
Photo by Rick Wunderman, 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.
Carr M J, 1992. . (pers. comm.).
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Walker J A, Patino L C, Cameron B I, Carr M J, 2000. Petrogenetic insights provided by compositional transects across the Central American Arc; southeastern Guatemala and Honduras. J Geophys Res, 105: 18,949-18,963.
Williams H, McBirney A R, 1969. Volcanic history of Honduras. Univ Calif Pub Geol Sci, 85: 1-101.