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Copahue

Stratovolcano · Chile-Argentina · 2953m

The broad glacier-covered summit of Volcán Copahue along the Chile/Argentina border is seen from the SE with conical Callaqui volcano in the distance. The lake-filled active crater of Copahue (lower center) has been the site of historical eruptions. The composite cone was constructed along the Chile/Argentina border within an 8-km-wide caldera formed 0.6 million years ago. The eastern summit crater is part of a 2-km-long, ENE-WSW line of nine craters that cuts across the western rim of the caldera.
The broad glacier-covered summit of Volcán Copahue along the Chile/Argentina border is seen from the SE with conical Callaqui volcano in the distance. The lake-filled active crater of Copahue (lower center) has been the site of historical eruptions. The composite cone was constructed along the Chile/Argentina border within an 8-km-wide caldera formed 0.6 million years ago. The eastern summit crater is part of a 2-km-long, ENE-WSW line of nine craters that cuts across the western rim of the caldera. · Photo: Photo by Oscar González-Ferrán, 1992 (University of Chile). · Wikimedia Commons
Type
Stratovolcano
Country
Chile-Argentina
Region
South America Volcanic Regions / Southern Andean Volcanic Arc
Elevation
2953m
Coordinates
-37.856, -71.183
Last eruption
2024
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Trachybasalt / Tephrite Basanite
Geological summary

Volcán Copahue is an elongated composite cone constructed along the Chile-Argentina border within the 6.5 x 8.5 km wide Trapa-Trapa caldera that formed between 0.6 and 0.4 million years ago near the NW margin of the 20 x 15 km Pliocene Caviahue (Del Agrio) caldera. The eastern summit crater, part of a 2-km-long, ENE-WSW line of nine craters, contains a briny, acidic 300-m-wide crater lake (also referred to as El Agrio or Del Agrio) and displays intense fumarolic activity. Acidic hot springs occur below the eastern outlet of the crater lake, contributing to the acidity of the Río Agrio, and another geothermal zone is located within Caviahue caldera about 7 km NE of the summit. Infrequent mild-to-moderate explosive eruptions have been recorded since the 18th century. Twentieth-century eruptions from the crater lake have ejected pyroclastic rocks and chilled liquid sulfur fragments.

From Wikipedia

Copahue is a stratovolcano in the Andes on the border of Bío Bío Region, Chile and Neuquén Province, Argentina. There are nine volcanic craters along a 2 km (1.2 mi) line, the easternmost of which is historically the most active, and contains a 300 m (1000 ft) wide crater lake with a pH ranging between 0.18 and 0.30. Eruptions from this crater lake have ejected pyroclastic rocks and chilled liquid sulfur fragments. Although the lake emptied during the 2000 eruption, it later returned to its previous levels. Copahue means "sulphur waters" in Mapuche.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
6820 BCE~6525 BCE · 1 eruptions · max VEI ?334 BCE~40 BCE · 1 eruptions · max VEI ?1729~2024 · 20 eruptions · max VEI 26820 BCE4756 BCE2398 BCE334 BCE1729

Detailed timeline

  1. 2024VEI 1Observed
    2024-10-16 – 2024-10-27
  2. 2021VEI 1Observed
    2021-07-02 – 2021-11-06
  3. 2020VEI 2Observed
    2020-06-16 – 2020-11-02
    Agrio Crater
  4. 2019VEI 2Observed
    2019-08-02 – 2019-11-12
    Agrio Crater
  5. 2017VEI 1Observed
    2017-06-04 – 2018-12-07
    El Agrio Crater
  6. 2015VEI 2Observed
    2015-09-18 – 2017-02-22
    Agrio Crater
  7. 2014VEI 1Observed
    2014-07-04 – 2014-12-02
    El Agrio Crater
  8. 2012VEI 2Observed
    2012-12-22 – 2013-12-10
    Agrio Crater
  9. 2012VEI 2Observed
    2012-07-17 – 2012-07-19
    El Agrio Crater
  10. 2000VEI 2Observed
    2000-07-01 – 2000-10-18
    Agrio Crater
  11. 1995VEI 2Observed
    1995-09-16 – Ongoing
    Agrio Crater
  12. 1994VEI 2Observed
    1994-12-16 – Ongoing
    Agrio Crater
  13. 1992VEI 2Observed
    1992-07-22 – 1993-07-02
    Agrio Crater
  14. 1961VEI 2Observed
    1961-07-02 – Ongoing
  15. 1960VEI ?Observed
    1960-07-02 – Ongoing
  16. 1944VEI ?Observed
    1944 – Ongoing
  17. 1937VEI 2Observed
    1937 – Ongoing
  18. 1867VEI 2Observed
    1867 – Ongoing
  19. 1759VEI ?Geological estimate
    1759 – Ongoing
  20. 1750VEI 2Observed
    1750 – Ongoing
  21. 250 BCEVEI ?Geological estimate
    BCE 250 – Ongoing
  22. 6820 BCEVEI ?Geological estimate
    BCE 6820 – Ongoing

External links

⚠ For reference only. Not for emergency response.