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United States · Stratovolcano

Mount Pavlof

Pavlof

Type
Stratovolcano
Elevation
2493m
Last eruption
2022
Mount Pavlof
Photo: U.S. Fish and Wildlife Service · Public domain · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America / Aleutian Ridge Volcanic Arc
Elevation
2493m
Coordinates
55.417, -161.894
Last eruption
2022
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic andesite
Geological summary

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.

From Wikipedia

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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Eruption history

48 recordedGlossary
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
1762~1788 · 1 eruptions · max VEI 41788~1814 · 1 eruptions · max VEI 21814~1840 · 3 eruptions · max VEI 21840~1866 · 3 eruptions · max VEI 21866~1892 · 3 eruptions · max VEI 21892~1917 · 6 eruptions · max VEI 31917~1943 · 4 eruptions · max VEI 31943~1969 · 6 eruptions · max VEI 21969~1995 · 13 eruptions · max VEI 31995~2021 · 8 eruptions · max VEI 317621814189219431995

Detailed timeline

  1. 2021VEI 2Observed
    2021-08-05 – 2022-12-07
  2. 2016VEI 2Observed
    2016-03-27 – 2016-07-30
    Summit crater
  3. 2014VEI 3Observed
    2014-05-31 – 2014-06-06
    NE flank
  4. 2014VEI 3Observed
    2014-11-12 – 2014-11-15
    Vent just N of summit and N flank
  5. 2013VEI 3Observed
    2013-05-13 – 2013-06-26
    Summit crater
  6. 2007VEI 2Observed
    2007-08-15 – 2007-09-13
  7. 2001VEI 1Method not stated
    2001-06-05 – end unknown
  8. 1996VEI 2Observed
    1996-09-11 – 1997-01-03
  9. 1990VEI 2Observed
    1990-03-05 – 1990-03-05
  10. 1986VEI 3Observed
    1986-04-16 – 1988-08-13
    NNE & SE summit vents, NE & SE flanks
  11. 1983VEI 2Observed
    1983-07-11 – 1983-07-18
  12. 1983VEI 3Observed
    1983-11-11 – 1983-12-18
    Upper NNE flank
  13. 1982VEI 1Method not stated
    1982-07-15 – end unknown
  14. 1981VEI 1Observed
    1981-03-30 – 1981-05-28
  15. 1981VEI 3Observed
    1981-09-25 – 1981-09-27
    Upper NNE flank (100 m below summit)
  16. 1980VEI 1Observed
    1980-07-06 – end unknown
  17. 1980VEI 3Observed
    1980-11-08 – 1980-11-13
    Upper NNE flank
  18. 1975VEI 2Observed
    1975-09-13 – 1977-03-16
  19. 1974VEI 1Observed
    1974-03-12 – 1974-03-24
  20. 1974VEI 3Observed
    1974-09-01 – 1975-01-13
  21. 1973VEI 2Observed
    1973-11-12 – 1973-11-13
    Upper NE flank
  22. 1966VEI 2Observed
    1966-03-15 – end unknown
    Upper NE or NNE flank
  23. 1960VEI 2Observed
    1960-07-02 – 1963-06-16
    Upper NE or NNE flank
  24. 1958VEI 2Observed
    1958-05-17 – 1958-08-28
    Upper NNE flank
  25. 1953VEI 1Observed
    1953-11-25 – 1954-08-16
    Upper NE or NNE flank
  26. 1951VEI 2Observed
    1951-10-16 – 1952-02-16
    Upper NE or NNE flank
  27. 1950VEI 2Observed
    1950-07-31 – 1951-05-16
    Upper NE or NNE flank
  28. 1936VEI 3Observed
    1936-07-02 – 1948-05-16
  29. 1929VEI 2Observed
    1929-03-16 – 1931-08-16
  30. 1924VEI 2Observed
    1924-01-17 – end unknown
  31. 1922VEI 2Observed
    1922-12-24 – 1923-02-28
  32. 1917VEI 2Observed
    1917-10-16 – end unknown
  33. 1914VEI 2Observed
    1914-07-06 – end unknown
  34. 1906VEI 3Observed
    1906-07-02 – 1911-12-07
    Summit and north flank fissure
  35. 1901VEI 2Observed
    1901-07-02 – end unknown
  36. 1894VEI 2Observed
    1894-07-02 – end unknown
  37. 1892VEI 2Observed
    1892-07-02 – end unknown
  38. 1886VEI 2Observed
    1886-07-02 – end unknown
  39. 1880VEI 1Observed
    1880-07-02 – end unknown
  40. 1866VEI 2Observed
    1866-03-14 – end unknown
  41. 1852VEI 1Method not stated
    1852-07-02 – end unknown
    Upper north flank
  42. 1846VEI 2Observed
    1846-08-16 – 1846-08-16
  43. 1845VEI 2Observed
    1845-08-12 – end unknown
  44. 1838VEI 1Observed
    1838-07-02 – end unknown
  45. 1825VEI 2Observed
    1825-07-02 – end unknown
  46. 1817VEI 2Observed
    1817-07-02 – end unknown
  47. 1790VEI 2Observed
    1790 – end unknown
  48. 1762VEI 4Method not stated
    1762 – 1786
    Volcano Uncertain

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External links

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