Stati Uniti · Stratovulcano
Monte Pavlof
Pavlof
- Tipo
- Stratovulcano
- Altitudine
- 2493 m
- Ultima eruzione
- 2022
- Tipo
- Stratovulcano
- Paese
- Stati Uniti
- Regione
- Nord America / Aleutian Ridge Volcanic Arc
- Altitudine
- 2493 m
- Coordinate
- 55.417, -161.894
- Ultima eruzione
- 2022
- Contesto tettonico
- Zona di subduzione / Crosta continentale (> 25 km)
- Forma vulcanica
- Composito
- Roccia principale
- Andesite / Andesite basaltica
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 ingleseMount 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
48 registrateGlossarioCronologia dettagliata
- 2021VEI 2Osservata2021-08-05 – 2022-12-07
- 2016VEI 2Osservata2016-03-27 – 2016-07-30Summit crater
- 2014VEI 3Osservata2014-05-31 – 2014-06-06NE flank
- 2014VEI 3Osservata2014-11-12 – 2014-11-15Vent just N of summit and N flank
- 2013VEI 3Osservata2013-05-13 – 2013-06-26Summit crater
- 2007VEI 2Osservata2007-08-15 – 2007-09-13
- 2001VEI 1Metodo non indicato2001-06-05 – fine sconosciuta
- 1996VEI 2Osservata1996-09-11 – 1997-01-03
- 1990VEI 2Osservata1990-03-05 – 1990-03-05
- 1986VEI 3Osservata1986-04-16 – 1988-08-13NNE & SE summit vents, NE & SE flanks
- 1983VEI 2Osservata1983-07-11 – 1983-07-18
- 1983VEI 3Osservata1983-11-11 – 1983-12-18Upper NNE flank
- 1982VEI 1Metodo non indicato1982-07-15 – fine sconosciuta
- 1981VEI 1Osservata1981-03-30 – 1981-05-28
- 1981VEI 3Osservata1981-09-25 – 1981-09-27Upper NNE flank (100 m below summit)
- 1980VEI 1Osservata1980-07-06 – fine sconosciuta
- 1980VEI 3Osservata1980-11-08 – 1980-11-13Upper NNE flank
- 1975VEI 2Osservata1975-09-13 – 1977-03-16
- 1974VEI 1Osservata1974-03-12 – 1974-03-24
- 1974VEI 3Osservata1974-09-01 – 1975-01-13
- 1973VEI 2Osservata1973-11-12 – 1973-11-13Upper NE flank
- 1966VEI 2Osservata1966-03-15 – fine sconosciutaUpper NE or NNE flank
- 1960VEI 2Osservata1960-07-02 – 1963-06-16Upper NE or NNE flank
- 1958VEI 2Osservata1958-05-17 – 1958-08-28Upper NNE flank
- 1953VEI 1Osservata1953-11-25 – 1954-08-16Upper NE or NNE flank
- 1951VEI 2Osservata1951-10-16 – 1952-02-16Upper NE or NNE flank
- 1950VEI 2Osservata1950-07-31 – 1951-05-16Upper NE or NNE flank
- 1936VEI 3Osservata1936-07-02 – 1948-05-16
- 1929VEI 2Osservata1929-03-16 – 1931-08-16
- 1924VEI 2Osservata1924-01-17 – fine sconosciuta
- 1922VEI 2Osservata1922-12-24 – 1923-02-28
- 1917VEI 2Osservata1917-10-16 – fine sconosciuta
- 1914VEI 2Osservata1914-07-06 – fine sconosciuta
- 1906VEI 3Osservata1906-07-02 – 1911-12-07Summit and north flank fissure
- 1901VEI 2Osservata1901-07-02 – fine sconosciuta
- 1894VEI 2Osservata1894-07-02 – fine sconosciuta
- 1892VEI 2Osservata1892-07-02 – fine sconosciuta
- 1886VEI 2Osservata1886-07-02 – fine sconosciuta
- 1880VEI 1Osservata1880-07-02 – fine sconosciuta
- 1866VEI 2Osservata1866-03-14 – fine sconosciuta
- 1852VEI 1Metodo non indicato1852-07-02 – fine sconosciutaUpper north flank
- 1846VEI 2Osservata1846-08-16 – 1846-08-16
- 1845VEI 2Osservata1845-08-12 – fine sconosciuta
- 1838VEI 1Osservata1838-07-02 – fine sconosciuta
- 1825VEI 2Osservata1825-07-02 – fine sconosciuta
- 1817VEI 2Osservata1817-07-02 – fine sconosciuta
- 1790VEI 2Osservata1790 – fine sconosciuta
- 1762VEI 4Metodo non indicato1762 – 1786Volcano Uncertain
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