San Diego

Photo of this volcano
Google Earth icon
  Google Earth Placemark
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 14.27°N
  • 89.48°W

  • 781 m
    2562 ft

  • 343001
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for San Diego.

The Global Volcanism Program has no Weekly Reports available for San Diego.

The Global Volcanism Program has no Bulletin Reports available for San Diego.

An extensive volcanic field of fresh-looking basaltic cinder cones and barren lava flows near Lake Güija, which straddles the border between El Salvador and Guatemala, is named after its largest feature, 781-m-high Volcán de San Diego. A large basaltic lava flow from the San Diego cinder cone dammed the drainage and was responsible for the formation of Lake Güija. Volcanism is concentrated in two areas near Lake Güija--an area of volcanic cones including San Diego east of the lake, and an area of small cones north of the lake near the Guatemalan border, north of the Río Ostua. None of the eruptions in the San Diego volcanic field have been dated, but Williams and McBirney (1955) estimated that the latest eruption occurred within the past few thousand years. Quaternary volcanic rocks are also located across Lake Güija in Guatemala.

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


Synonyms

Güija Volcanic Field

Cones

Feature Name Feature Type Elevation Latitude Longitude
Chata, Cerro la Lava cone 746 m 14° 24' 0" N 89° 34' 0" W
Clara, Laguneta Pyroclastic cone 480 m 14° 18' 0" N 89° 28' 0" W
Conventilio, Cerro Cone 580 m 14° 10' 0" N 89° 30' 0" W
Coyotes, Cerro los Cone 595 m 14° 12' 0" N 89° 29' 0" W
Culebra, Loma la Pyroclastic cone 572 m 14° 20' 0" N 89° 36' 0" W
Iguana, Loma Pyroclastic cone 521 m 14° 17' 0" N 89° 30' 0" W
Junquillo, Cerro Pyroclastic cone 640 m 14° 20' 0" N 89° 35' 0" W
Masatepeque, Cerro Pyroclastic cone 540 m 14° 18' 0" N 89° 29' 0" W
Ostúa, Cerro de Pyroclastic cone 580 m 14° 19' 0" N 89° 35' 0" W
Pajalitos, Loma los Pyroclastic cone 500 m 14° 18' 0" N 89° 30' 0" W
Quemado, Cerro Pyroclastic cone 460 m 14° 15' 0" N 89° 28' 0" W
San Jorge, Cerro de Cone 680 m 14° 10' 0" N 89° 29' 0" W
Shiste, Cerro el Lava cone 780 m 14° 24' 0" N 89° 34' 0" W
Tecuán, Cerro Lava cone 812 m 14° 24' 0" N 89° 34' 0" W
Tule, Cerro el Cone 468 m 14° 15' 0" N 89° 29' 0" W
Vega de la Caña, Cerro la Pyroclastic cone 465 m 14° 17' 0" N 89° 30' 0" W
Cerro Quemado cinder cone near of the outlet of Lake Güija has been extensively quarried, and only a remnant of the cone remains. The San Diego volcanic field straddles the El Salvador/Guatemala border and contains numerous basaltic cinder cones and associated lava flows on both sides of Lake Güija.

Photo by Giuseppina Kysar, 1999 (Smithsonian Institution).
An extensive volcanic field of fresh basaltic cinder cones and barren lava flows near Lake Güija is named after its largest feature, 781-m-high Volcán de San Diego (upper right). A large basaltic lava flow from the San Diego cinder cone dammed the drainage and was responsible for the formation of 12-km-long Lake Güija, which lies mostly in El Salvador, but extends across the border into Guatemala. Cerro el Tule cinder cone in the center of the photo lies near the eastern shore of the lake, due south of Volcán San Diego.

Photo by Giuseppina Kysar, 1999 (Smithsonian Institution).
Volcán de San Diego (upper right) is seen here from the south at the outlet of Lake Güija. The lake was formed when lava flows from San Diego blocked the channel of the Dasague river. Cerro el Tule (left) lies across a narrow channel from the lower flanks of San Diego and during higher water levels forms an island. The 468-m-high Cerro el Tule contains a well-preserved summit crater and is one of the many morphologically youthful cones of the San Diego volcanic field.

Photo by Giuseppina Kysar, 1999 (Smithsonian Institution).
A panoramic view from the NE shows from left to right Volcán de San Diego, Cerro Masatepeque, and the two peaks of Loma Iguana and Cerro las Iguanas. Laguna de Metapán is at the right. San Diego is the largest cone of a volcanic field surrounding Lake Güija near the El Salvador/Guatemala border. Basaltic flows from smaller vents of the San Diego volcanic field were responsible for blocking drainages and forming Laguna de Metapán. The larger Lago de Güija was formed as a result of flows from Volcán de San Diego itself.

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.

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.

Weyl R, 1952. Estudios Geologicos de la Region del Rio Comalapa, El Salvador. Communic Itic Ano I, San Salvador.

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.

Volcano Types

Volcanic field

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
130,144
130,144
316,296
7,169,826

Affiliated Databases

Large Eruptions of San Diego 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).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.