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Lascar

Stratovulcano · Chile · 5592 m

Volcán Láscar (right) is the most active volcano of the northern Chilean Andes. A steam plume rises in 1986 from one of six overlapping summit craters capping the andesitic-to-dacitic stratovolcano, which is seen here from Toconao to the NW. Volcán Aguas Calientes (left center), an older, higher stratovolcano 5 km to the east, displays a well-developed summit crater and a probable Holocene lava flow near its summit. Frequent explosive eruptions have been recorded from Láscar since the mid-19th century.
Volcán Láscar (right) is the most active volcano of the northern Chilean Andes. A steam plume rises in 1986 from one of six overlapping summit craters capping the andesitic-to-dacitic stratovolcano, which is seen here from Toconao to the NW. Volcán Aguas Calientes (left center), an older, higher stratovolcano 5 km to the east, displays a well-developed summit crater and a probable Holocene lava flow near its summit. Frequent explosive eruptions have been recorded from Láscar since the mid-19th century. · Foto: Photo by Paul King, MINSAL Corporation, 1986 (courtesy of Peter Francis, Open University). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Chile
Regione
Sud America / Central Andean Volcanic Arc
Altitudine
5592 m
Coordinate
-23.370, -67.730
Ultima eruzione
2026
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Láscar is the most active volcano of the northern Chilean Andes. The andesitic-to-dacitic stratovolcano contains six overlapping summit craters. Prominent lava flows descend its NW flanks. An older, higher stratovolcano 5 km E, Volcán Aguas Calientes, displays a well-developed summit crater and a probable Holocene lava flow near its summit (de Silva and Francis, 1991). Láscar consists of two major edifices; activity began at the eastern volcano and then shifted to the western cone. The largest eruption took place about 26,500 years ago, and following the eruption of the Tumbres scoria flow about 9000 years ago, activity shifted back to the eastern edifice, where three overlapping craters were formed. Frequent small-to-moderate explosive eruptions have been recorded since the mid-19th century, along with periodic larger eruptions that produced ashfall hundreds of kilometers away. The largest historical eruption took place in 1993, producing pyroclastic flows to 8.5 km NW of the summit and ashfall in Buenos Aires.

Sintesi da Wikipedia

Riassunto in inglese

Lascar is a stratovolcano in Chile within the Central Volcanic Zone of the Andes, a volcanic arc that spans Peru, Bolivia, Argentina and Chile. It is the most active volcano in the region, with records of eruptions going back to 1848. It is composed of two separate cones with several summit craters. The westernmost crater of the eastern cone is presently active. Volcanic activity is characterized by constant release of volcanic gas and occasional vulcanian eruptions.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
7250 BCE~6941 BCE · 1 eruzioni · VEI max. ?5395 BCE~5086 BCE · 1 eruzioni · VEI max. 01717~2026 · 36 eruzioni · VEI max. 47250 BCE5086 BCE2612 BCE448 BCE1717

Cronologia dettagliata

  1. 2026VEI ?Osservata
    2026-02-08 – 2026-02-08
  2. 2022VEI 3Osservata
    2022-12-10 – 2023-02-03
  3. 2015VEI 2Osservata
    2015-10-30 – 2017-04-02
    Summit craters
  4. 2013VEI 1Osservata
    2013-04-02 – 2013-11-20
    Central active crater
  5. 2006VEI 3Osservata
    2006-04-18 – 2007-07-18
  6. 2005VEI 3Osservata
    2005-05-04 – 2005-05-04
  7. 2003VEI 1Stima geologica
    2003-12-09 – 2003-12-09
  8. 2002VEI 2Osservata
    2002-10-26 – 2002-10-27
  9. 2001VEI ?Stima geologica
    2001-05-17 – 2001-07-05
  10. 2000VEI 2Osservata
    2000-07-20 – 2001-01-18
  11. 1996VEI 2Osservata
    1996-10-18 – 1996-10-18
  12. 1994VEI 2Osservata
    1994-07-20 – 1994-07-26
  13. 1994VEI 2Osservata
    1994-11-13 – 1995-07-20
  14. 1993VEI 4Osservata
    1993-01-30 – 1993-08-16
    Western crater of east summit cone
  15. 1993VEI 2Osservata
    1993-12-17 – 1994-02-27
  16. 1991VEI 2Osservata
    1991-10-21 – 1992-05-23
  17. 1990VEI 1Osservata
    1990-11-24 – 1990-11-24
  18. 1987VEI 3Osservata
    1987-11-16 – 1990-04-06
    Western crater of east summit cone
  19. 1986VEI 3Osservata
    1986-09-14 – 1986-09-16
    Western crater of east summit cone
  20. 1984VEI 0Osservata
    1984-12-16 – 1985-07-16
    Western crater of east summit cone
  21. 1974VEI 1Stima geologica
    1974-07-16 – 1974-09-16
  22. 1972VEI 2Stima geologica
    1972-07-02 – In corso
  23. 1969VEI 1Osservata
    1969-05-16 – In corso
  24. 1959VEI 2Osservata
    1959-11-16 – 1968-01-31
  25. 1954VEI 2Osservata
    1954-06-16 – 1954-07-16
  26. 1951VEI 2Osservata
    1951-11-16 – 1952-02-19
    East summit crater
  27. 1940VEI 2Osservata
    1940-07-02 – In corso
  28. 1933VEI 2Osservata
    1933-10-09 – 1933-12-16
  29. 1902VEI 2Osservata
    1902-07-02 – In corso
  30. 1898VEI 2Osservata
    1898-07-02 – 1900-07-02
  31. 1883VEI 2Osservata
    1883-07-02 – 1885-07-02
  32. 1875VEI 2Osservata
    1875-07-02 – In corso
  33. 1858VEI 2Osservata
    1858-04-16 – 1858-12-16
  34. 1854VEI 1Osservata
    1854-01-20 – 1854-01-30
    Lascar or Aguas Calientes
  35. 1853VEI 2Stima geologica
    1853-07-02 – In corso
  36. 1848VEI 2Osservata
    1848-07-02 – In corso
    Lascar or Agua Calientes
  37. 5150 a.C. (±1250 anni)VEI 0Stima geologica
    BCE 5150 – In corso
    Eastern crater
  38. 7250 a.C.VEI ?Stima geologica
    BCE 7250 – In corso
    Lascar II (Tumbres scoria flow)

Link esterni

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