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Copahue

Stratovulcano · Chile-Argentina · 2953 m

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. · Foto: Photo by Oscar González-Ferrán, 1992 (University of Chile). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Chile-Argentina
Regione
South America Volcanic Regions / Southern Andean Volcanic Arc
Altitudine
2953 m
Coordinate
-37.856, -71.183
Ultima eruzione
2024
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Trachybasalt / Tephrite Basanite
Sintesi geologica

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.

Sintesi da Wikipedia

Riassunto in inglese

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.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
6820 BCE~6525 BCE · 1 eruzioni · VEI max. ?334 BCE~40 BCE · 1 eruzioni · VEI max. ?1729~2024 · 20 eruzioni · VEI max. 26820 BCE4756 BCE2398 BCE334 BCE1729

Cronologia dettagliata

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

Link esterni

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