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Monte Pavlof

Pavlof

Stratovulcano · United States · 2493 m

Pavlof, rising above low plains to its NW, is one of Alaska's most active volcanoes. It is part of a NNE-SSW-trending line of volcanoes near the tip of the Alaskan Peninsula. Little Pavlof is the small cone on the right horizon. The low saddle to the left separates Pavlof from Pavlof Sister, whose lower flanks are seen to the far left.
Pavlof, rising above low plains to its NW, is one of Alaska's most active volcanoes. It is part of a NNE-SSW-trending line of volcanoes near the tip of the Alaskan Peninsula. Little Pavlof is the small cone on the right horizon. The low saddle to the left separates Pavlof from Pavlof Sister, whose lower flanks are seen to the far left. · Foto: Photo by Steve McNutt, 1979 (University of Alaska, Alaska Volcano Observatory). · Wikimedia Commons
Tipo
Stratovulcano
Paese
United States
Regione
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Altitudine
2493 m
Coordinate
55.417, -161.894
Ultima eruzione
2022
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The most active volcano of the Aleutian arc, Pavlof is a Holocene stratovolcano that was constructed along a line of vents extending NE from the Emmons Lake caldera. Pavlof and Pavlof Sister to the NE form a dramatic pair of symmetrical, glacier-covered stratovolcanoes that overlook Pavlof and Volcano bays. Little Pavlof is a smaller cone on the SW flank of Pavlof volcano, near the rim of Emmons Lake caldera. Unlike Pavlof Sister, eruptions have frequently been reported from Pavlof, typically Strombolian to Vulcanian explosive eruptions from the summit vents and occasional lava flows. The active vents lie near the summit on the north and east sides. The largest recorded eruption took place in 1911, at the end of a 5-year-long eruptive episode, when a fissure opened on the N flank, ejecting large blocks and issuing lava flows.

Sintesi da Wikipedia

Riassunto in inglese

Mount Pavlof or Pavlof Volcano is a stratovolcano of the Aleutian Range on the Alaska Peninsula. It has been one of the most active volcanoes in the United States since 1980, with eruptions recorded in 1980, 1981, 1983, 1986–1988, 1996–1997, 2007, 2013, twice in 2014, 2016, and again in 2021-2022. It is not currently erupting (as of October 15, 2024). The most common lava type here is basaltic andesite and the 2013-2014 lavas contained approximately 53 wt.% SiO2. The volcano is monitored by the Alaska Volcano Observatory- a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS). With a threat score of 95, the threat from future eruptions is considered to be high; much of this threat comes from the possibility of disruption of nearby air routes by large releases of ash. The mountain shares a name with the nearby Pavlof Sister, which is thought to have last erupted from 1762 to 1786, although this period of activity is sometimes attributed to Pavlof volcano instead.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1762~1788 · 1 eruzioni · VEI max. 41788~1814 · 1 eruzioni · VEI max. 21814~1840 · 3 eruzioni · VEI max. 21840~1866 · 3 eruzioni · VEI max. 21866~1892 · 3 eruzioni · VEI max. 21892~1917 · 6 eruzioni · VEI max. 31917~1943 · 4 eruzioni · VEI max. 31943~1969 · 6 eruzioni · VEI max. 21969~1995 · 13 eruzioni · VEI max. 31995~2021 · 8 eruzioni · VEI max. 317621814189219431995

Cronologia dettagliata

  1. 2021VEI 2Osservata
    2021-08-05 – 2022-12-07
  2. 2016VEI 2Osservata
    2016-03-27 – 2016-07-30
    Summit crater
  3. 2014VEI 3Osservata
    2014-05-31 – 2014-06-06
    NE flank
  4. 2014VEI 3Osservata
    2014-11-12 – 2014-11-15
    Vent just N of summit and N flank
  5. 2013VEI 3Osservata
    2013-05-13 – 2013-06-26
    Summit crater
  6. 2007VEI 2Osservata
    2007-08-15 – 2007-09-13
  7. 2001VEI 1Stima geologica
    2001-06-05 – In corso
  8. 1996VEI 2Osservata
    1996-09-11 – 1997-01-03
  9. 1990VEI 2Osservata
    1990-03-05 – 1990-03-05
  10. 1986VEI 3Osservata
    1986-04-16 – 1988-08-13
    NNE & SE summit vents, NE & SE flanks
  11. 1983VEI 2Osservata
    1983-07-11 – 1983-07-18
  12. 1983VEI 3Osservata
    1983-11-11 – 1983-12-18
    Upper NNE flank
  13. 1982VEI 1Stima geologica
    1982-07-15 – In corso
  14. 1981VEI 1Osservata
    1981-03-30 – 1981-05-28
  15. 1981VEI 3Osservata
    1981-09-25 – 1981-09-27
    Upper NNE flank (100 m below summit)
  16. 1980VEI 1Osservata
    1980-07-06 – In corso
  17. 1980VEI 3Osservata
    1980-11-08 – 1980-11-13
    Upper NNE flank
  18. 1975VEI 2Osservata
    1975-09-13 – 1977-03-16
  19. 1974VEI 1Osservata
    1974-03-12 – 1974-03-24
  20. 1974VEI 3Osservata
    1974-09-01 – 1975-01-13
  21. 1973VEI 2Osservata
    1973-11-12 – 1973-11-13
    Upper NE flank
  22. 1966VEI 2Osservata
    1966-03-15 – In corso
    Upper NE or NNE flank
  23. 1960VEI 2Osservata
    1960-07-02 – 1963-06-16
    Upper NE or NNE flank
  24. 1958VEI 2Osservata
    1958-05-17 – 1958-08-28
    Upper NNE flank
  25. 1953VEI 1Osservata
    1953-11-25 – 1954-08-16
    Upper NE or NNE flank
  26. 1951VEI 2Osservata
    1951-10-16 – 1952-02-16
    Upper NE or NNE flank
  27. 1950VEI 2Osservata
    1950-07-31 – 1951-05-16
    Upper NE or NNE flank
  28. 1936VEI 3Osservata
    1936 – 1948-05
  29. 1929VEI 2Osservata
    1929-03 – 1931-08
  30. 1924VEI 2Osservata
    1924-01-17 – In corso
  31. 1922VEI 2Osservata
    1922-12-24 – 1923-02-28
  32. 1917VEI 2Osservata
    1917-10 – In corso
  33. 1914VEI 2Osservata
    1914-07-06 – In corso
  34. 1906VEI 3Osservata
    1906 – 1911-12-07
    Summit and north flank fissure
  35. 1901VEI 2Osservata
    1901 – In corso
  36. 1894VEI 2Osservata
    1894 – In corso
  37. 1892VEI 2Osservata
    1892 – In corso
  38. 1886VEI 2Osservata
    1886 – In corso
  39. 1880VEI 1Osservata
    1880 – In corso
  40. 1866VEI 2Osservata
    1866-03-14 – In corso
  41. 1852VEI 1Stima geologica
    1852 – In corso
    Upper north flank
  42. 1846VEI 2Osservata
    1846-08 – 1846-08
  43. 1845VEI 2Osservata
    1845-08-12 – In corso
  44. 1838VEI 1Osservata
    1838 – In corso
  45. 1825VEI 2Osservata
    1825 – In corso
  46. 1817VEI 2Osservata
    1817 – In corso
  47. 1790VEI 2Osservata
    1790 – In corso
  48. 1762VEI 4Stima geologica
    1762 – 1786
    Volcano Uncertain

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