Tolhuaca

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 38.31°S
  • 71.645°W

  • 2739 m
    8984 ft

  • 357093
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: March 1987 (SEAN 12:03) Citation IconCite this Report


Active solfatara field found

An active solfataric field was detected in one of Tolguaca's NW craters (at 38.29°S, 71.67°W) during a March 1986-January 1987 geologic study. Several vents up to 2 m wide covered an area of ~200 m2. The vents emitted boiling water, high pressure steam, and H2S, with a jet-like noise. The entire area showed intense alteration and a small amount of sulfur deposition.

Information Contacts: H. Moreno, Univ de Chile.

The Global Volcanism Program has no Weekly Reports available for Tolhuaca.

Bulletin Reports - Index


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

03/1987 (SEAN 12:03) Active solfatara field found




Information is preliminary and subject to change. All times are local (unless otherwise noted)


March 1987 (SEAN 12:03) Citation IconCite this Report


Active solfatara field found

An active solfataric field was detected in one of Tolguaca's NW craters (at 38.29°S, 71.67°W) during a March 1986-January 1987 geologic study. Several vents up to 2 m wide covered an area of ~200 m2. The vents emitted boiling water, high pressure steam, and H2S, with a jet-like noise. The entire area showed intense alteration and a small amount of sulfur deposition.

Information Contacts: H. Moreno, Univ de Chile.

Eruptive History


Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
4000 BCE (after) Unknown Confirmed 0 Uncertain Pemehue
4885 BCE ± 243 years Unknown Confirmed 3 Uncertain
5371 BCE ± 243 years Unknown Confirmed 3 Uncertain
5857 BCE ± 243 years Unknown Confirmed 3 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.

Photo Gallery


Tolguaca volcano, the snow-capped peak at the left, is a late-Pleistocene to Holocene stratovolcano located immediately NW of Lonquimay volcano. The cinder cone at the right in this view from the SE is the Navidad cone on the NE flank of Lonquimay, which formed during an eruption in 1989. The 2806-m-high Tolguaca is older than its neighbor Lonquimay. It is dissected by glaciers and only fumarolic activity has occurred during historical time. Flank vents are oriented NW-SE, in line with Lonquimay, and SW-NE-trending vents occur on the south flank.

Photo by Norm Banks, 1990 (U.S. Geological Survey).
See title for photo information.

Smithsonian Sample Collections Database


There are no samples for Tolhuaca in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites