Global Volcanism Program

The Global Volcanism Program has no activity reports available 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.

Basic Data

Volcano Number

Last Known Eruption

Elevation

Latitude
Longitude

351001

Pleistocene

1,163 m / 3,816 ft

5.65°N
74.961°W

Morphology

Volcano Landform
Minor

Volcano Types
Maar
Pyroclastic cone

Geological Summary

Although the San Diego maar has been known and described by Servicio Geologico Colombiana, along with dating by Toro (1988) that placed the most recent activity in the late Pleistocene-early Holocene, work by Borrero et al. (2016) provides a more comprehensive understanding of this volcano. The NNE-elongated crater is about 1.5 x 2.1 km and contains a lake about 230 m below the crater rim. A cone feature located immediately NE of the maar is the remains of a dacitic dome with landslides on the flanks. They determined that the volcanic features were all the result of a single monogenetic eruptive period that began with the vent opening and incremental growth of the original crater, followed by additional widening of the maar. Effusion of the dome was the last stage of active volcanism. A paleosol below the young maar sequence was ¹⁴C dated at 20,056 ± 93 years cal BP, and the dome was slightly younger at 18 ka BP based on fission track dating of apatite.

References

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

Borrero C, Murcia H, Agustin-Flores J, Arboleda M T, Giraldo A M, 2016. Pyroclastic deposits of San Diego maar, central Colombia: an example of a silicic magma-related monogenetic eruption in a hard substrate. in Nemeth K, Carrasco-Nuneez G, Aranda-Gomez J J, and Smith I E M (eds) Monogenetic Volcanism. Geological Society, London, Special Publications, 446. https://doi.org/10.1144/SP446.10

Hall M L, Wood C A, 1985. Volcano-tectonic segmentation of the northern Andes. Geology 13:203-207.

Monsalve M L, Ortiz I D, Norini G, 2017. El Escondido, a newly identified silicic Quaternary volcano in the NE region of the northern volcanic segment (Central Cordillera of Colombia). Journal of Volcanology and Geothermal Research. https://doi.org/10.1016/j.jvolgeores.2017.12.010

Servicio Geologico Colombiano, 2014-. http://www.sgc.gov.co/.

Eruptive History

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 12,000 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).

The Global Volcanism Program has no synonyms or subfeatures listed for San Diego.

Photo Gallery

The Global Volcanism Program has no photographs available for San Diego.

Smithsonian Sample Collections Database

There are no samples for San Diego 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 San Diego. 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 San Diego. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player.

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).