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Gunung Shishaldin

Shishaldin

Stratovolkan · United States · 2857 m

Shishaldin, located on central Unimak Island in the Aleutians, has a summit crater that emits a nearly continuous plume. It is the highest and one of the most active volcanoes of the Aleutian Islands. There have been frequent Strombolian eruptions, sometimes with lava flows, since the 18th century.
Shishaldin, located on central Unimak Island in the Aleutians, has a summit crater that emits a nearly continuous plume. It is the highest and one of the most active volcanoes of the Aleutian Islands. There have been frequent Strombolian eruptions, sometimes with lava flows, since the 18th century. · Foto: Photo by Chris Nye (Alaska Division of Geological & Geophysical Surveys, Alaska Volcano Observatory). · Wikimedia Commons
Tipe
Stratovolkan
Negara
United States
Wilayah
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Ketinggian
2857 m
Koordinat
54.756, -163.970
Letusan terakhir
2023
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

The symmetrical glacier-covered Shishaldin in the Aleutian Islands is the westernmost of three large stratovolcanoes in the eastern half of Unimak Island. The Aleuts named the volcano Sisquk, meaning "mountain which points the way when I am lost." Constructed atop an older glacially dissected edifice, it is largely basaltic in composition. Remnants of an older edifice are exposed on the W and NE sides at 1,500-1,800 m elevation. There are over two dozen pyroclastic cones on its NW flank, which is covered by massive aa lava flows. Frequent explosive activity, primarily consisting of Strombolian ash eruptions from the small summit crater, but sometimes producing lava flows, has been recorded since the 18th century. A steam plume often rises from the summit crater.

Ringkasan Wikipedia

Ringkasan Inggris

Shishaldin Volcano, or Mount Shishaldin, is one of six active volcanoes on Unimak Island in the eastern Aleutian Islands of Alaska. It is the highest mountain peak of the Aleutian Islands, rising to a height of 9,373 ft (2,857 m) above sea level. Shishaldin's magma supply is generated via flux melting above the Aleutian Trench, where the Pacific Plate subducts beneath the North American Plate. Due to its remote location and frequently inclement weather, the Alaska Volcano Observatory (AVO) monitors the volcano remotely via satellite and a seismic network deployed in 1997. Shishaldin is one of the most active volcanoes in the Aleutian Islands, with 40 confirmed eruptions in the last 11,700 years. Notably, Shishaldin produced a sub-Plinian eruption in 1999.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
7550 BCE~7231 BCE · 1 letusan · VEI maks. ?7231 BCE~6912 BCE · 1 letusan · VEI maks. ?747~1066 · 1 letusan · VEI maks. ?1704~2023 · 48 letusan · VEI maks. 37550 BCE5316 BCE2763 BCE530 BCE1704

Garis waktu rinci

  1. 2023VEI 3Teramati
    2023-07-11 – 2023-11-03
  2. 2019VEI 3Teramati
    2019-07-23 – 2020-05-04
    Summit crater
  3. 2014VEI 1Teramati
    2014-01-30 – 2015-07-03
    Summit crater
  4. 2008VEI 1Perkiraan geologi
    2008-02-12 – 2008-02-12
  5. 2004VEI 2Teramati
    2004-02-17 – 2004-07-16
  6. 2000VEI 1Perkiraan geologi
    2000-08-11 – Berlangsung
    Summit
  7. 1999VEI 3Teramati
    1999-03-13 – 1999-05-27
  8. 1999VEI 1Perkiraan geologi
    1999-09-25 – 2000-02-04
  9. 1998VEI 1Teramati
    1998-11-04 – 1998-11-04
  10. 1997VEI 1Teramati
    1997-06-02 – 1997-06-02
  11. 1995VEI 3Teramati
    1995-12-23 – 1996-05-16
  12. 1993VEI 2Teramati
    1993-09-04 – 1993-10-29
  13. 1986VEI 2Teramati
    1986-03-19 – 1987-02-15
  14. 1981VEI ?Perkiraan geologi
    1981-09-25 – Berlangsung
  15. 1979VEI 2Teramati
    1979-02-16 – Berlangsung
  16. 1978VEI 2Teramati
    1978-02-08 – 1978-02-09
  17. 1976VEI 2Teramati
    1976-01-16 – 1976-09-28
  18. 1975VEI 2Teramati
    1975-09-13 – 1975-10-26
  19. 1967VEI 2Teramati
    1967-01-28 – Berlangsung
  20. 1963VEI 2Teramati
    1963-12-28 – Berlangsung
  21. 1955VEI 2Teramati
    1955-07-16 – Berlangsung
  22. 1953VEI 2Teramati
    1953-10-04 – Berlangsung
  23. 1951VEI 2Teramati
    1951-04-16 – 1951-10-05
  24. 1948VEI 2Teramati
    1948 – Berlangsung
  25. 1946VEI 2Teramati
    1946-08 – 1947-01
  26. 1932VEI 2Teramati
    1932-02-01 – 1932-05-21
  27. 1929VEI 2Teramati
    1929-05-28 – 1929-06-23
    Summit and north flank
  28. 1928VEI 2Teramati
    1928-08 – Berlangsung
  29. 1927VEI ?Teramati
    1927 – Berlangsung
  30. 1925VEI ?Teramati
    1925 – Berlangsung
  31. 1922VEI 2Teramati
    1922-10-15 – Berlangsung
  32. 1912VEI ?Perkiraan geologi
    1912 – Berlangsung
  33. 1901VEI ?Teramati
    1901 – Berlangsung
  34. 1899VEI ?Perkiraan geologi
    1899 – Berlangsung
  35. 1898VEI 2Teramati
    1898 – Berlangsung
  36. 1897VEI ?Perkiraan geologi
    1897 – Berlangsung
  37. 1883VEI 2Teramati
    1883 – Berlangsung
  38. 1880VEI ?Perkiraan geologi
    1880 – 1881
  39. 1865VEI ?Perkiraan geologi
    1865 – Berlangsung
  40. 1842VEI 2Teramati
    1842 – Berlangsung
  41. 1838VEI 2Teramati
    1838 – Berlangsung
  42. 1830VEI 3Teramati
    1830-11-16 – 1831-03-16
  43. 1827VEI 2Teramati
    1827 – 1829
  44. 1826VEI 0Teramati
    1826 – Berlangsung
  45. 1825VEI 2Teramati
    1825 – Berlangsung
    NE flank (1300 m)
  46. 1824VEI 3Teramati
    1824 – Berlangsung
  47. 1790VEI ?Perkiraan geologi
    1790 – Berlangsung
  48. 1775VEI ?Perkiraan geologi
    1775 – 1778
  49. 950VEI ?Perkiraan geologi
    950 – Berlangsung
  50. 7050 SMVEI ?Perkiraan geologi
    BCE 7050 – Berlangsung
  51. 7550 SMVEI ?Perkiraan geologi
    BCE 7550 – Berlangsung

Tautan eksternal

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