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The Global Volcanism Program has no activity reports for San Pedro.
The Global Volcanism Program has no Weekly Reports available for San Pedro.
The Global Volcanism Program has no Bulletin Reports available for San Pedro.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1960 Dec 2||Unknown||Confirmed||2||Historical Observations|
|1938 Feb||Unknown||Confirmed||2||Historical Observations|
|[ 1923 ]||[ Unknown ]||Uncertain|
|[ 1917 ]||[ Unknown ]||Uncertain|
|[ 1916 ]||[ Unknown ]||Uncertain|
|1911 Sep||Unknown||Confirmed||2||Historical Observations|
|1901 May 25||1901 Aug||Confirmed||2||Historical Observations|
|1891 (?)||Unknown||Confirmed||2||Historical Observations|
|1877 (?)||Unknown||Confirmed||2||Historical Observations|
|[ 1870 ]||[ Unknown ]||Uncertain|
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|
|Poruña, La||Cone||3545 m||21° 53' 0" S||68° 30' 0" W|
|San Pablo||Twin volcano||5334 m||21° 53' 0" S||68° 20' 0" W|
|The composite volcano of San Pedro in the arid Atacama desert of northern Chile is one of the world's highest historically active volcanoes. The 6145-m-high San Pedro (left) is located to the west of its older twin volcano, 6092-m-high San Pablo (center). The youngest cone of San Pedro was constructed within the horseshoe-shaped crater left by the collapse of an older edifice, which produced a large debris avalanche to the west. Reports of variable reliability mention historical eruptions in the 19th and 20th centuries.
Photo by Oscar González-Ferrán (University of Chile).
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.
Casertano L, 1963a. Chilean Continent. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 15: 1-55.
de Silva S L, Francis P W, 1991. Volcanoes of the Central Andes. Berlin: Springer-Verlag, 216 p.
Francis P W, Roobol M J, Walker G P L, Cobbold P R, Coward M, 1974. The San Pedro and San Pablo volcanoes of northern Chile and their hot avalanche deposits. Geol Rundschau, 63: 357-388.
Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
O'Callaghan L J, Francis P W, 1986. Volcanological and petrological evolution of San Pedro volcano, Provincia El Loa, north Chile. J Geol Soc London, 143: 275-286.
Worner G, Hammerschmidt K, Henjes-Kunst F, Lezaun J, Wilke H, 2000. Geochronology (40Ar/39Ar, K-Ar and He-exposure ages) of Cenozoic magmatic rocks from Northern Chile (18-22° S): implications for magmatism and tectonic evolution of the central Andes. Rev Geol Chile, 27: 205-240.
|Large Eruptions of San Pedro||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.|