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There are no activity reports for El Valle.
Available Weekly Reports
There are no Weekly Reports available for El Valle.
There are no Holocene eruptions known for El Valle. If this volcano has had large eruptions prior to 10,000 years ago, information might be found in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. 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. Additional discussion of data sources can be found under Volcano Data Criteria.
Bush M B, Colinvaux P A, 1990. A pollen record of a complete glacial cycle from lowland Panama. J Vegetation Sci, 1: 105-118.
de Boer J Z, Defant M J, Stewart R H, Restrepo J F, Clark L F, Ramirez A H, 1988. Quaternary calc-alkaline volcanism in western Panama: regional variation and implication for the plate tectonic framework. J South Amer Earth Sci, 1: 275-293.
Defant M J, Clark L F, Stewart R H, Drummond M S, de Boer J Z, Maury R C, Bellon H, Jackson T E, Restrepo J F, 1991. Andesite and dacite genesis via contrasting processes; the geology and geochemistry of El Valle Volcano, Panama. Contr Mineral Petr, 106: 309-324.
Diaz F, Ponce F, Reyes E, 2000. Advanced pre-feasibility studies of El Valle de Anton geothermal field. Proc World Geotherm Cong 2000, Kyushu - Tohoku, Japan, May 28-June 10, 2000, p 159-168.
Frullani A, 1987a. Estudio de reconocimiento geotermico nacional area de Valle de Anton. IRHE - BID - OLADE, 74 p.
Hidalgo P J, 2007. Petrology and geochemistry of El Hato silicic ignimbrite, El Valle volcano, Panama. Unpublished MSci thesis, Michigan Tech Univ, 218 p.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Innocenti F, 1986. Estudios petrologicos adicionales de algunas vulcanitas del sistema Baru y Valle de Anton. IRHE - OLADE, unpublished rpt, 22 p and tables.
Innocenti F, 1985a. Estudio de reconocimiento geotermico nacional informe petrografico. IRHE - OLADE, upublished rpt, 34 p and tables.
IRHE, 1987. Final report on the reconnaissance study of geothermal resources in the Republic of Panama. IRHE - OLADE - BID, 72 p.
Merla A, 1995. Integracion de los estudios geocientificos en las zonas geotermicas Valle de Anton y Chitra-Calobre. IRHE - BID, 29 p.
Shevenell L, 1989. Preliminary evaluation of thermal and nonthermal waters at selected sites in Panama, Central America. Los Alamos Nat Lab, LA-11103-MS: 1-27.
El Valle volcano, 80 km SW of Panama City, is a broad stratovolcano cut by a large compound Pleistocene caldera. The 6-km-wide El Valle de Antón caldera was formed about 56,000 years ago in association with eruption of the dacitic El Hato pyroclastic flows. The caldera has steep, 200-300 m high walls overlooking a flat floor underlain by deposits of a former caldera lake and currently occupied by the town of El Valle. Cerro Pajita, Cerro Gaital, and Cerro Caracoral form a dacitic lava dome complex that was constructed along an E-W-trending lineament within the caldera and forms the 1185 m high point of the volcano. Major phreatomagmatic plinian eruptions produced when magma interacted with caldera-lake water as recently as about 34,600 years ago generated pyroclastic flows that reached the Pacific coast, 25 km to the south. Phreatic eruptions have occurred since then (the most recent dated eruption took place about 13,000 years ago), and activity may have continued into the Holocene (IRHE, 1987). A geothermal exploration program is currently underway to evaluate the energy potential of the caldera.