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Mount Kanaga

Kanaga

Stratovolkan · United States · 1307 m

Kanaga is situated within the Kanaton caldera at the northern tip of Kanaga Island. The caldera rim forms a 760-m-high arcuate ridge, which can be seen S and E (left) of Kanaga. The two flows that reach the coast on either side of the sea cliffs in the lower center were produced during an eruptive period from mid-1993 through 1995.
Kanaga is situated within the Kanaton caldera at the northern tip of Kanaga Island. The caldera rim forms a 760-m-high arcuate ridge, which can be seen S and E (left) of Kanaga. The two flows that reach the coast on either side of the sea cliffs in the lower center were produced during an eruptive period from mid-1993 through 1995. · Foto: Photo by Chris Nye, 2000 (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
1307 m
Koordinat
51.923, -177.168
Letusan terakhir
2023
Kondisi tektonik
Subduction zone / Intermediate crust (15-25 km)
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

Symmetrical Kanaga stratovolcano is situated within the Kanaton caldera at the northern tip of Kanaga Island. The caldera rim forms a 760-m-high arcuate ridge south and east of Kanaga; a lake occupies part of the SE caldera floor. The volume of subaerial dacitic tuff is smaller than would typically be associated with caldera collapse, and deposits of a massive submarine debris avalanche associated with edifice collapse extend nearly 30 km to the NNW. Several fresh lava flows from historical or late prehistorical time descend the flanks of Kanaga, in some cases to the sea. Historical eruptions, most of which are poorly documented, have been recorded since 1763. Kanaga is also noted petrologically for ultramafic inclusions within an outcrop of alkaline basalt SW of the volcano. Fumarolic activity occurs in a circular, 200-m-wide, 60-m-deep summit crater and produces vapor plumes sometimes seen on clear days from Adak, 50 km to the east.

Ringkasan Wikipedia

Ringkasan Inggris

Kanaga Volcano, or Mount Kanaga, is a stratovolcano at the northern tip of Kanaga Island in the Aleutian Islands, Alaska. It is situated within a caldera, which forms the arcuate Kanaton Ridge south and east of Kanaga. A crater lake occupies part of the SE caldera floor. The summit of Kanaga has a crater with fumarolic activity.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
7300 BCE~6989 BCE · 1 letusan · VEI maks. ?4814 BCE~4503 BCE · 1 letusan · VEI maks. ?2328 BCE~2017 BCE · 2 letusan · VEI maks. ?2017 BCE~1706 BCE · 1 letusan · VEI maks. ?1706 BCE~1395 BCE · 1 letusan · VEI maks. ?158~469 · 1 letusan · VEI maks. ?780~1091 · 1 letusan · VEI maks. ?1091~1401 · 2 letusan · VEI maks. ?1712~2023 · 12 letusan · VEI maks. 27300 BCE5125 BCE2638 BCE463 BCE1712

Garis waktu rinci

  1. 2023VEI 1Teramati
    2023-12-18 – 2023-12-18
  2. 2012VEI 2Teramati
    2012-02-18 – 2012-02-18
    E-W fissure at summit crater
  3. 1996VEI 1Perkiraan geologi
    1996-06-11 – Berlangsung
  4. 1995VEI 2Teramati
    1995-06-19 – 1995-06-23
  5. 1994VEI 2Teramati
    1994-01-05 – 1994-11-26
  6. 1942VEI 1Teramati
    1942 – Berlangsung
  7. 1906VEI ?Teramati
    1906-05 – Berlangsung
    Summit, upper SW flank
  8. 1904VEI 0Teramati
    1904 – Berlangsung
    Upper south flank ?
  9. 1829VEI ?Perkiraan geologi
    1829 – Berlangsung
  10. 1827VEI ?Perkiraan geologi
    1827 – Berlangsung
  11. 1783VEI ?Teramati
    1783 – 1787
  12. 1763VEI ?Perkiraan geologi
    1763 – Berlangsung
  13. 1400 (±50 tahun)VEI ?Perkiraan geologi
    1400 – Berlangsung
  14. 1150 (±100 tahun)VEI ?Perkiraan geologi
    1150 – Berlangsung
  15. 850 (±200 tahun)VEI ?Perkiraan geologi
    850 – Berlangsung
  16. 200 (±150 tahun)VEI ?Perkiraan geologi
    200 – Berlangsung
  17. 1550 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 1550 – Berlangsung
  18. 1900 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 1900 – Berlangsung
  19. 2150 SM (±200 tahun)VEI ?Perkiraan geologi
    BCE 2150 – Berlangsung
  20. 2300 SM (±150 tahun)VEI ?Perkiraan geologi
    BCE 2300 – Berlangsung
  21. 4700 SM (±150 tahun)VEI ?Perkiraan geologi
    BCE 4700 – Berlangsung
  22. 7300 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 7300 – Berlangsung

Tautan eksternal

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