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Cile · Argentina · Stratovulcano

Copahue

Tipo
Stratovulcano
Altitudine
2953 m
Ultima eruzione
2024
Copahue
Foto: Mono Andes from - · CC BY 2.0 · Wikimedia Commons
Tipo
Stratovulcano
Paese
Cile · Argentina
Regione
Sud America / Southern Andean Volcanic Arc
Altitudine
2953 m
Coordinate
-37.856, -71.183
Ultima eruzione
2024
Contesto tettonico
Zona di subduzione / Crosta continentale (> 25 km)
Forma vulcanica
Composito
Roccia principale
Trachibasalto / Tefrite 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

22 registrateGlossario
Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni · Usa le frecce per spostarti tra le barre, Invio per aprire
6820 a.C.~6525 a.C. · 1 eruzioni · VEI max. ?334 a.C.~40 a.C. · 1 eruzioni · VEI max. ?1729~2024 · 20 eruzioni · VEI max. 26820 a.C.4756 a.C.2398 a.C.334 a.C.1729

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
    2012-07-17 – 2012-07-19
    El Agrio Crater
  9. 2012VEI 2Osservata
    2012-12-22 – 2013-12-10
    Agrio Crater
  10. 2000VEI 2Osservata
    2000-07-01 – 2000-10-18
    Agrio Crater
  11. 1995VEI 2Osservata
    1995-09-16 – fine sconosciuta
    Agrio Crater
  12. 1994VEI 2Osservata
    1994-12-16 – fine sconosciuta
    Agrio Crater
  13. 1992VEI 2Osservata
    1992-07-22 – 1993-07-02
    Agrio Crater
  14. 1961VEI 2Osservata
    1961-07-02 – fine sconosciuta
  15. 1960VEI ?Osservata
    1960-07-02 – fine sconosciuta
  16. 1944VEI ?Osservata
    1944-07-02 – fine sconosciuta
  17. 1937VEI 2Osservata
    1937-07-02 – fine sconosciuta
  18. 1867VEI 2Osservata
    1867-07-02 – fine sconosciuta
  19. 1759VEI ?Metodo non indicato
    1759 – fine sconosciuta
  20. 1750VEI 2Osservata
    1750 – fine sconosciuta
  21. 250 a.C.VEI ?Stima geologica
    250 a.C. – fine sconosciuta
  22. 6820 a.C.VEI ?Stima geologica
    6820 a.C. – fine sconosciuta

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