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Akan Volcanic Complex

Akan

Kaldera · Japan · 1499 m

Oakandake, the largest post-caldera cone at Akan volcano, is seen here from the W across the Akan Caldera lake. It was constructed at the NE end of the 13 x 14 km caldera, opposite a cluster of stratovolcanoes at the SW end. Meakan in the SW group has been frequently active.
Oakandake, the largest post-caldera cone at Akan volcano, is seen here from the W across the Akan Caldera lake. It was constructed at the NE end of the 13 x 14 km caldera, opposite a cluster of stratovolcanoes at the SW end. Meakan in the SW group has been frequently active. · Foto: Photo by Wataru Hirose, 1996 (Hokkaido University). · Wikimedia Commons
Tipe
Kaldera
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Kuril Volcanic Arc
Ketinggian
1499 m
Koordinat
43.384, 144.013
Letusan terakhir
2026
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Caldera
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

Akan is a 13 x 24 km caldera located immediately SW of Kussharo caldera in eastern Hokkaido. The elongated, irregular outline of the caldera rim reflects its incremental formation during major explosive eruptions from the early to mid-Pleistocene. There are four post-caldera stratovolcanoes, three at the SW end of the caldera and the other on the NE side. Conical Oakandake was frequently active during the Holocene. The 1-km-wide Nakamachineshiri crater of Meakandake was formed during a major pumice-and-scoria eruption about 13,500 years ago. The Meakandake group, composed of nine overlapping cones E of Lake Akan, has produced mild phreatic eruptions since the beginning of the 19th century. The main cone of Meakandake proper has a triple crater at its summit. Although recorded eruptions at Meakandake have consisted of minor phreatic explosions, four major magmatic eruptions with pyroclastic flows have also occurred during the Holocene.

Ringkasan Wikipedia

Ringkasan Inggris

Akan Volcanic Complex is a volcanic group of volcanoes that grew out of the Akan caldera. It is located within Akan National Park, about 50 km Northwest of Kushiro in eastern Hokkaidō, Japan.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
7050 BCE~6747 BCE · 1 letusan · VEI maks. 44630 BCE~4327 BCE · 1 letusan · VEI maks. ?3722 BCE~3420 BCE · 1 letusan · VEI maks. 33117 BCE~2815 BCE · 1 letusan · VEI maks. ?2209 BCE~1907 BCE · 1 letusan · VEI maks. ?999 BCE~697 BCE · 1 letusan · VEI maks. ?697 BCE~394 BCE · 1 letusan · VEI maks. ?394 BCE~92 BCE · 1 letusan · VEI maks. ?92 BCE~211 · 2 letusan · VEI maks. 4211~513 · 1 letusan · VEI maks. ?513~816 · 1 letusan · VEI maks. ?816~1118 · 1 letusan · VEI maks. ?1118~1421 · 1 letusan · VEI maks. ?1421~1723 · 2 letusan · VEI maks. ?1723~2026 · 23 letusan · VEI maks. 17050 BCE4932 BCE2512 BCE394 BCE1723

Garis waktu rinci

  1. 2026VEI ?Teramati
    2026-03-07 – 2026-03-14
  2. 2025VEI ?Teramati
    2025-09-15 – 2025-09-15
  3. 2008VEI 1Teramati
    2008-11-18 – 2008-11-28
    Me-Akan (Ponmachineshiri)
  4. 2006VEI 1Teramati
    2006-03-21 – 2006-03-21
    NE flank of Me-Akan
  5. 1998VEI 1Teramati
    1998-11-09 – 1998-11-09
    Me-Akan (Ponmachineshiri)
  6. 1996VEI 1Teramati
    1996-11-21 – 1996-11-21
    Me-Akan (Ponmachineshiri crater no. 4)
  7. 1988VEI 1Teramati
    1988-01-05 – 1988-02-18
    Me-Akan (SE rim of Ponmachineshiri)
  8. 1984VEI 1Teramati
    1984-05-01 – 1984-05-01
    Me-Akan (Ponmachineshiri)
  9. 1966VEI 1Teramati
    1966-06-15 – 1966-06-15
    Me-Akan (Nakamachineshiri)
  10. 1965VEI 1Teramati
    1965-05-15 – 1965-05-15
    Me-Akan (Nakamachineshiri)
  11. 1964VEI 1Teramati
    1964-06-18 – 1964-07-04
    Me-Akan (Nakamachineshiri)
  12. 1962VEI 1Teramati
    1962-04-28 – 1962-04-28
    Me-Akan (Nakamachineshiri)
  13. 1960VEI 1Teramati
    1960-09-16 – 1960-09-16
    Me-Akan (Ponmachineshiri)
  14. 1959VEI 1Teramati
    1959-05-15 – 1959-10-16
    Me-Akan (Naka- and Ponmachineshiri)
  15. 1958VEI 1Teramati
    1958-02-23 – 1958-02-23
    Me-Akan (Ponmachineshiri)
  16. 1957VEI 1Teramati
    1957-02-26 – 1957-09-05
    Me-Akan (Ponmachineshiri)
  17. 1956VEI 1Teramati
    1956-03-18 – 1956-10-31
    Me-Akan (Ponmachineshiri)
  18. 1955VEI 1Teramati
    1955-11-19 – 1955-11-19
    Me-Akan (Ponmachineshiri)
  19. 1954VEI 1Teramati
    1954-01-07 – 1954-04-13
    Me-Akan (Nakamachineshiri)
  20. 1951VEI 1Perkiraan geologi
    1951-07-31 – 1952-03-16
    Me-Akan (NE foot)
  21. 1927VEI 1Perkiraan geologi
    1927-04 – 1927-05
    Me-Akan
  22. 1808VEI ?Teramati
    1808 – Berlangsung
    Me-Akan
  23. 1780 (±75 tahun)VEI 1Teramati
    1780 – Berlangsung
    Me-Akan
  24. 1600 (±50 tahun)VEI ?Perkiraan geologi
    1600 – Berlangsung
    Me-Akan
  25. 1550VEI ?Perkiraan geologi
    1550 – Berlangsung
    Me-Akan
  26. 1250 (±300 tahun)VEI ?Perkiraan geologi
    1250 – Berlangsung
    Me-Akan (Ponmachineshiri)
  27. 950VEI ?Perkiraan geologi
    950 – Berlangsung
    Me-Akan (Ponmachineshiri)
  28. 600 (±300 tahun)VEI ?Perkiraan geologi
    600 – Berlangsung
    Akan-Fuji
  29. 250VEI ?Perkiraan geologi
    250 – Berlangsung
    Akan-Fuji
  30. 100 (±100 tahun)VEI ?Perkiraan geologi
    100 – Berlangsung
    Akan-Fuji
  31. 50 SMVEI 4Perkiraan geologi
    BCE 50 – Berlangsung
    Akan-Fuji
  32. 300 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 300 – Berlangsung
    Akan-Fuji
  33. 550 SMVEI ?Perkiraan geologi
    BCE 550 – Berlangsung
    Akan-Fuji
  34. 800 SM (±250 tahun)VEI ?Perkiraan geologi
    BCE 800 – Berlangsung
    Me-Akan (Ponmachineshiri)
  35. 2050 SMVEI ?Perkiraan geologi
    BCE 2050 – Berlangsung
    Kita-yama, Me-Akan (Ponmachineshiri)
  36. 3050 SMVEI ?Perkiraan geologi
    BCE 3050 – Berlangsung
    Nishi-yama, O-Akan
  37. 3550 SM (±500 tahun)VEI 3Perkiraan geologi
    BCE 3550 – Berlangsung
    Me-Akan (Nakamachineshiri)
  38. 4550 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 4550 – Berlangsung
    Me-Akan (Ponmachineshiri)
  39. 7050 SMVEI 4Perkiraan geologi
    BCE 7050 – Berlangsung
    Me-Akan (Nakamachineshiri)

Tautan eksternal

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