Antuco

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 37.406°S
  • 71.349°W

  • 2979 m
    9771 ft

  • 357080
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 24 April-30 April 2013 Citation IconCite this Report


The Buenos Aires VAAC reported that only gas and steam rose from Antuco on 20 April; although a pilot reported ash emissions, ash was not identified in satellite imagery or by web camera during clear skies.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)


Most Recent Bulletin Report: May 1992 (BGVN 17:05) Citation IconCite this Report


Fumarolic activity in summit crater's small scoria cone

During a February overflight, fumarolic activity was visible in the small scoria cone nested within the main crater. Weak summit fumaroles had previously been observed during visits in 1969, 1982, and March 1984. Fumarolic activity has apparently been continuous, but of variable intensity, from the cone since the volcano's last eruption in 1869. Lava flows from Antuco dammed Laja Lake's outlet in 1853, causing the water level to rise around 20 m.

Information Contacts: H. Moreno, SAVO, Temuco.

Weekly Reports - Index


2013: April


24 April-30 April 2013 Citation IconCite this Report


The Buenos Aires VAAC reported that only gas and steam rose from Antuco on 20 April; although a pilot reported ash emissions, ash was not identified in satellite imagery or by web camera during clear skies.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)


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.

05/1992 (BGVN 17:05) Fumarolic activity in summit crater's small scoria cone




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


May 1992 (BGVN 17:05) Citation IconCite this Report


Fumarolic activity in summit crater's small scoria cone

During a February overflight, fumarolic activity was visible in the small scoria cone nested within the main crater. Weak summit fumaroles had previously been observed during visits in 1969, 1982, and March 1984. Fumarolic activity has apparently been continuous, but of variable intensity, from the cone since the volcano's last eruption in 1869. Lava flows from Antuco dammed Laja Lake's outlet in 1853, causing the water level to rise around 20 m.

Information Contacts: H. Moreno, SAVO, Temuco.

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1972 ] [ Unknown ] Discredited    
[ 1929 ] [ Unknown ] Discredited    
1869 Unknown Confirmed 2 Historical Observations
1863 Dec Unknown Confirmed 2 Historical Observations
[ 1862 Jan ] [ 1862 Mar 3 ] Uncertain    
1861 Feb (?) 1861 Aug (?) Confirmed 0 Historical Observations
1852 Nov 1853 Jan Confirmed 3 Historical Observations NE flank fissure and summit
[ 1848 ] [ Unknown ] Uncertain 2  
1845 Feb 26 1845 Mar 1 (in or after) Confirmed 2 Historical Observations
[ 1839 ] [ Unknown ] Uncertain 2  
1828 Dec 18 Unknown Confirmed 2 Historical Observations
1820 1821 (?) Confirmed 1 Historical Observations
1806 May (?) Unknown Confirmed 2 Historical Observations
1752 Jan 31 1752 Feb 1 Confirmed 3 Historical Observations
1750 ± 10 years Unknown Confirmed 2 Historical Observations
7750 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected)

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


Antuco volcano rises dramatically above the shores of Laguna de la Laja. Edifice failure at the beginning of the Holocene created a large horseshoe-shaped caldera whose NW rim forms the ridge descending diagonally across the photo to the right. The steep-sided modern basaltic cone has grown 1000 m since then, producing fresh-looking lava flows with prominent levees that have overtopped the caldera rim and reached the lake shore in the foreground. The most recent eruptions of Antuco occurred during the 18th and 19th centuries.

Photo by Hugo Moreno (University of Chile).
See title for photo information.
Antuco volcano, seen here from the NW, has a complicated history beginning with construction of an andesitic stratovolcano during the Pleistocene. Edifice failure at the beginning of the Holocene produced a large debris avalanche that traveled down the Río Laja to the west. The collapse left a large horseshoe-shaped caldera whose NW rim forms the ridge descending to the right. The steep-sided modern basaltic cone (upper right) has grown 1000 m since then. Moderate explosive eruptions were recorded in the 18th and 19th centuries.

Photo by Norm Banks, 1990 (U.S. Geological Survey).
See title for photo information.
The snow-capped modern summit of 2979-m-high Antuco volcano rises above the rim of a large horseshoe-shaped caldera, whose WNW rim forms the flat ridge just above the snow line. The caldera was formed by collapse of an older Antuco volcano at the beginning of the Holocene. The 1-km-high modern cone subsequently grew at the head of the scarp. Eruptions from both summit and flank vents have occurred during the 19th and 20th centuries.

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

Smithsonian Sample Collections Database


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

Affiliated Sites