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Aracar

Photo of this volcano
  • Country
  • Volcanic Region
  • Landform | Volc Type
  • Last Known Eruption
  • 24.29°S
  • 67.783°W

  • 6,095 m
    19,997 ft

  • 355160
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number


Most Recent Bulletin Report: April 1993 (BGVN 18:04) Citation IconCite this Report

Ash column reported

A steam plume was observed rising above Arácar on 28 March. Viewed from the town of Tolar Grande, 50 km SE, the plume persisted throughout the clear day. At least twice during the day, a large ash column slowly rose 2,000 m above the summit. The following day clouds prevented a clear view of the volcano, but an "ashy haze" in the sky was noted. A local observer indicated that the activity was not unusual.

Arácar has a base 10 km in diameter. It is located just E of the Argentina-Chile border, ~ 100 km S of Lascar and 80 km NE of Llullaillaco volcanoes. No historical eruptions have been recorded. Moyra Gardeweg provided the following background. "It is clearly younger than the surrounding Miocene volcanoes. Its steep conical edifice has been cut by some deep gorges and an uncovered alteration zone lies close to its summit on the NE flank. It has a well-developed and well-preserved summit crater (1-1.5 km diameter) that contains a tiny lake. Lava flows are well preserved at the base of the cone (below 4,500-m elev), a common feature of Pliocene-to-Quaternary volcanoes in the Central Andes. I have no information about its exact age, but the good preservation of the summit crater and lava flows suggest that it could be Quaternary, although I can only assume it is Pliocene or younger."

Information Contacts: R. Trujillo, Colorado, USA; M. Gardeweg, SERNAGEOMIN, Santiago.

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

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.

04/1993 (BGVN 18:04) Ash column reported




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


April 1993 (BGVN 18:04) Citation IconCite this Report

Ash column reported

A steam plume was observed rising above Arácar on 28 March. Viewed from the town of Tolar Grande, 50 km SE, the plume persisted throughout the clear day. At least twice during the day, a large ash column slowly rose 2,000 m above the summit. The following day clouds prevented a clear view of the volcano, but an "ashy haze" in the sky was noted. A local observer indicated that the activity was not unusual.

Arácar has a base 10 km in diameter. It is located just E of the Argentina-Chile border, ~ 100 km S of Lascar and 80 km NE of Llullaillaco volcanoes. No historical eruptions have been recorded. Moyra Gardeweg provided the following background. "It is clearly younger than the surrounding Miocene volcanoes. Its steep conical edifice has been cut by some deep gorges and an uncovered alteration zone lies close to its summit on the NE flank. It has a well-developed and well-preserved summit crater (1-1.5 km diameter) that contains a tiny lake. Lava flows are well preserved at the base of the cone (below 4,500-m elev), a common feature of Pliocene-to-Quaternary volcanoes in the Central Andes. I have no information about its exact age, but the good preservation of the summit crater and lava flows suggest that it could be Quaternary, although I can only assume it is Pliocene or younger."

Information Contacts: R. Trujillo, Colorado, USA; M. Gardeweg, SERNAGEOMIN, Santiago.

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.

Eruptive History

There is data available for 0 confirmed Holocene eruptive periods.

[ 1993 Mar 28 ] Uncertain Eruption

Episode 1 | Eruption
1993 Mar 28 - Unknown Evidence from Unknown

List of 5 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion Uncertain
   - - - -    - - - - Phreatic activity Uncertain
   - - - -    - - - - Avalanche Uncertain
   - - - -    - - - - Ash Uncertain
1993 Mar 28    - - - - VEI (Explosivity Index)
Deformation History

There is no Deformation History data available for Aracar.

Emission History

There is no Emissions History data available for Aracar.

GVP Map Holdings

Maps are not currently available due to technical issues.

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included.

Smithsonian Sample Collections Database

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

External Sites