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Izalco

Stratovulcano · El Salvador · 1950 m

Volcán de Izalco is seen here from the north, on the southern flank of Santa Ana. It began erupting in 1770 CE and frequent Strombolian eruptions produced a steep-sided, 650-m-high stratovolcano over a 200-year period. Izalco was one of the most frequently active volcanoes in Central America, producing ejecta and lava flows from both summit and flank vents.
Volcán de Izalco is seen here from the north, on the southern flank of Santa Ana. It began erupting in 1770 CE and frequent Strombolian eruptions produced a steep-sided, 650-m-high stratovolcano over a 200-year period. Izalco was one of the most frequently active volcanoes in Central America, producing ejecta and lava flows from both summit and flank vents. · Foto: Copyrighted photo by Stephen O'Meara. · Wikimedia Commons
Tipo
Stratovulcano
Paese
El Salvador
Regione
Middle America-Caribbean Volcanic Regions / Central America Volcanic Arc
Altitudine
1950 m
Coordinate
13.813, -89.633
Ultima eruzione
1966
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Volcán de Izalco began growing in 1770 CE on the southern flank of Santa Ana volcano, eventually building a steep 650-m-high stratovolcano truncated by a 250-m-wide summit crater. Frequent Strombolian eruptions during the two centuries prior to the cessation of activity in 1966 provided a night-time beacon for ships, causing it to be known as El Faro, the "Lighthouse of the Pacific." The dominantly basaltic andesite tephra and lava flows are geochemically distinct from those of both Santa Ana and its fissure-controlled flank vents. Lava flows have primarily erupted from flank vents, traveling as far as about 7 km south down the slopes of Santa Ana.

Sintesi da Wikipedia

Riassunto in inglese

Izalco is an active stratovolcano on the side of the Santa Ana Volcano, which is located in western El Salvador. It is situated on the southern flank of the Santa Ana volcano. Izalco erupted almost continuously from 1770 to 1958 earning it the nickname of "Lighthouse of the Pacific", and experienced a flank eruption in 1966. During an eruption in 1926, the village of Matazano was buried and 56 people were killed. The volcano erupted on highly arable land which was used for the production of coffee, cacao, and sugar cane.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1770~1790 · 3 eruzioni · VEI max. 21790~1809 · 4 eruzioni · VEI max. 21809~1829 · 2 eruzioni · VEI max. 21829~1848 · 4 eruzioni · VEI max. 21848~1868 · 10 eruzioni · VEI max. 21868~1888 · 13 eruzioni · VEI max. 21888~1907 · 5 eruzioni · VEI max. 21907~1927 · 4 eruzioni · VEI max. 31927~1946 · 6 eruzioni · VEI max. 21946~1966 · 2 eruzioni · VEI max. 317701809186819071946

Cronologia dettagliata

  1. 1966VEI 0Osservata
    1966-10-28 – 1966-11-16
    SSE flank (550 m below summit)
  2. 1948VEI 3Osservata
    1948-11-04 – 1957-12-01
    Summit, SW and NE flanks
  3. 1939VEI 2Osservata
    1939-02 – 1948-02
    Summit and SSE flank
  4. 1937VEI 2Osservata
    1937 – 1938
  5. 1933VEI 2Osservata
    1933-11-30 – 1934-01-12
  6. 1931VEI 2Osservata
    1931-03-31 – In corso
  7. 1930VEI 0Osservata
    1930-04 – In corso
    Outer slope of eastern summit crater
  8. 1927VEI 2Osservata
    1927 – 1928
  9. 1925VEI 3Osservata
    1925-12-26 – 1927-01
  10. 1924VEI 2Osservata
    1924-03 – In corso
  11. 1920VEI 2Osservata
    1920-10-29 – 1921-04-10
    SE flank
  12. 1912VEI 2Osservata
    1912-01-16 – 1916-01-26
    Summit and NE flank
  13. 1903VEI 2Osservata
    1903-11 – 1905-03
    Summit and east flank
  14. 1902VEI 2Osservata
    1902-05-10 – 1902-12-30
    Summit and NE flank
  15. 1899VEI 2Osservata
    1899-12-31 – 1900-03
  16. 1891VEI 2Osservata
    1891 – 1898-07
  17. 1890VEI 0Osservata
    1890-03-26 – 1890-04-20
    Summit and upper east flank
  18. 1887VEI 2Osservata
    1887 – 1889
  19. 1885VEI 2Osservata
    1885 – In corso
  20. 1884VEI 2Osservata
    1884-03-09 – 1884-03-10
  21. 1883VEI 2Osservata
    1883-09-05 – 1883-11-13
  22. 1882VEI 2Osservata
    1882-07-12 – In corso
  23. 1881VEI 0Osservata
    1881-01-01 – In corso
  24. 1879VEI 2Osservata
    1879-12-25 – 1880-03
  25. 1878VEI ?Osservata
    1878 – In corso
  26. 1874VEI ?Stima geologica
    1874 – 1875
  27. 1872VEI 2Osservata
    1872-12 – 1873-03-19
  28. 1870VEI 2Stima geologica
    1870-05-19 – In corso
  29. 1869VEI 2Osservata
    1869-03-01 – 1869-06-18
    Summit and east flank
  30. 1868VEI 2Osservata
    1868-02-16 – 1868-02-17
  31. 1867VEI 2Osservata
    1867-04 – 1867-08
  32. 1866VEI 2Osservata
    1866-04-27 – 1866-08-15
  33. 1864VEI 2Osservata
    1864-05-15 – 1865-06-15
    Summit and NE flank
  34. 1863VEI 0Osservata
    1863 – In corso
  35. 1859VEI 0Osservata
    1859-12-08 – 1860-01-22
  36. 1858VEI 2Osservata
    1858-02-06 – 1859-07
  37. 1857VEI 2Osservata
    1857-02-15 – 1857-02-19
  38. 1856VEI 2Osservata
    1856-05-24 – 1856-09-01
    Summit and south flank
  39. 1854VEI 2Osservata
    1854-05-13 – 1854-06-08
  40. 1850VEI 2Osservata
    1850 – In corso
  41. 1844VEI 2Osservata
    1844-06 – 1844-10
  42. 1842VEI 2Osservata
    1842 – In corso
  43. 1838VEI 2Osservata
    1838 – 1840
  44. 1836VEI 2Osservata
    1836 – In corso
  45. 1825VEI 2Osservata
    1825 – In corso
  46. 1817VEI 2Osservata
    1817 – In corso
  47. 1805VEI 2Osservata
    1805 – 1807
  48. 1802VEI 2Osservata
    1802 – 1803
  49. 1798VEI 2Osservata
    1798-04 – In corso
  50. 1793VEI 2Osservata
    1793-03-29 – 1793-09
  51. 1783VEI 0Osservata
    1783-07 – In corso
  52. 1772VEI 2Osservata
    1772 – In corso
  53. 1770VEI 2Osservata
    1770-02-23 – In corso

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