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There are no activity reports for Tolguaca.
There are no Holocene eruptions known for Tolguaca. 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.
Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.
Moreno H, 1974. Airplane flight over active volcanoes of central-south Chile. Internatl Symp Volc Andean & Antarctic Volc Problems Guidebook, Excur D-3, 56 p.
Moreno H, Gardeweg M C, 1989. La erupcion reciente en el complejo volcanico Lonquimay (Diciembre 1988-), Andes del Sur. Rev Geol Chile, 16: 93-117.
Moreno H, Naranjo J A, 1991. The southern Andes volcanoes (33°-41° 30' S), Chile. 6th Geol Cong Chile, Excur PC-3, 26 p.
Petit-Breuihl M E, 1994. . (pers. comm.).
Smithsonian Institution-SEAN, 1975-89. [Monthly event reports]. Bull Scientific Event Alert Network (SEAN), v 1-14.
Tolguaca is a late-Pleistocene to Holocene stratovolcano located immediately NW of Lonquimay volcano. Only fumarolic activity has occurred from basaltic-andesitic Tolguaca during historical time. A NW-SE zone of aligned summit craters is youngest to the NW. Another group of vents cutting the south and east flanks is oriented SW-NE, parallel to the zone of flank vents on nearby Lonquimay volcano, and is of postglacial age (Moreno and Gardeweg 1989). Reports of eruptions in 1876 and on January 7, 1933, have not been confirmed. The latter date probably refers to an eruption of Lonquimay or Llaima volcanoes (Petit-Breuilh 1994, pers. comm.). The glacially eroded surface of Tolguaca contrasts with its neighbor of similar height, Lonquimay, and attests to its older age.