El Aguajito

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 27.6°N
  • 112.53°W

  • 1300 m
    4264 ft

  • 341802
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for El Aguajito.

The Global Volcanism Program has no Weekly Reports available for El Aguajito.

The Global Volcanism Program has no Bulletin Reports available for El Aguajito.

Volcano Types

Lava dome(s)

Tectonic Setting

Rift zone
Continental crust (> 25 km)

Geological Summary

El Aguajito caldera (also known as Santa Ana caldera) is located along the Gulf of California immediately NE of Tres Vírgenes volcano and NW of La Reforma caldera. The rim of the approximately 10-km-wide resurgent caldera is not exposed, but an arcuate line of andesitic-to-rhyolitic lava domes covers its northern margin. Formation of the rhyolitic caldera was associated with the eruption of ignimbrites, K-Ar dated at 0.76 +/- 0.06 million years ago (Ma), most of which were deposited in the Gulf of California. Rhyolitic lava domes on the northern margin have been dated at 0.5 +/- 0.04 Ma; dacitic lava domes on the southern side of the caldera appear to be older. The regional NNE-SSW-trending Cimarron fault cuts across the center of the caldera. Hot springs are located along the southern caldera margin, and active seismicity was noted during geothermal exploration.

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


Santa Ana


Feature Name Feature Type Elevation Latitude Longitude
Aguajito, El Caldera


Feature Name Feature Type Elevation Latitude Longitude
Agua Agria Thermal
Rincón, El Thermal

Photo Gallery

Three major Quaternary volcanic complexes are visible in this Landsat satellite image of Baja California. The N-S-trending Las Vírgenes volcanic complex at the left center consists of three southward-younging stratovolcanoes. The dramatic 10-km-wide La Reforma caldera along the Gulf of California coast at the upper right displays dark-colored andesitic outer flanks and a resurgent dome in the center of the caldera. The extensively eroded El Aguajito caldera lies north of Tres Vírgenes and NW of La Reforma and has indistinct margins.

Landsat image (National Aeronautical and Space Administration, processed by Brian Hausback, UC Sacramento).


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.

Garduno-Monroy V H, Vargas-Ledezma H, Campos-Enriquez J O, 1993. Preliminary geologic studies of Sierra El Aguajito (Baja California, Mexico): a resurgent-type caldera. J Volc Geotherm Res, 59: 47-58.

Sawlan M G, 1991. Magmatic evolution of the Gulf of California rift. In: Dauphin J P and Simoneit B A (eds) {The Gulf and Peninsular Province of the Californias}, Amer Assoc Petrol Geol Mem, 47: 301-369.

Affiliated Databases

Large Eruptions of El Aguajito 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.