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Hokkaidō Koma-ga-take

Hokkaido-Komagatake

Stratovulcano · Japan · 1131 m

Komagatake on the Oshima Peninsula of southern Hokkaido rises to the N above Lake Onuma and is one of the most active volcanoes of Japan's northernmost island. The summit formed as a result of edifice collapse and hummocky debris avalanche deposits were responsible for the formation of Lake Onuma. A period of more frequent explosive activity began with a major explosive eruption in 1640.
Komagatake on the Oshima Peninsula of southern Hokkaido rises to the N above Lake Onuma and is one of the most active volcanoes of Japan's northernmost island. The summit formed as a result of edifice collapse and hummocky debris avalanche deposits were responsible for the formation of Lake Onuma. A period of more frequent explosive activity began with a major explosive eruption in 1640. · Foto: Photo by Ichio Moriya (Kanazawa University). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Japan
Regione
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Altitudine
1131 m
Coordinate
42.063, 140.677
Ultima eruzione
2000
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Much of the truncated Hokkaido-Komagatake andesitic volcano on the Oshima Peninsula of southern Hokkaido is Pleistocene in age. The sharp-topped summit lies at the western side of a large breached crater that formed as a result of edifice collapse in 1640 CE. Hummocky debris avalanche material occurs at the base of the volcano on three sides. Two late-Pleistocene and two Holocene Plinian eruptions occurred prior to the first historical eruption in 1640, which began a period of more frequent explosive activity. The 1640 eruption, one of the largest in Japan during historical time, deposited ash as far away as central Honshu and produced a debris avalanche that reached the sea. The resulting tsunami caused 700 fatalities. Three Plinian eruptions have occurred since 1640; in 1694, 1856, and 1929.

Sintesi da Wikipedia

Riassunto in inglese

Hokkaidō Koma-ga-take , also Oshima Koma-ga-take (渡島駒ヶ岳), Oshima Fuji (渡島富士), or just Koma-ga-take (駒ヶ岳) is a 1,131 metres (3,711 ft) andesitic stratovolcano on the border between Mori, Shikabe, and Nanae, all within the Oshima Subprefecture of Hokkaidō, Japan.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
4600 BCE~4380 BCE · 2 eruzioni · VEI max. 54380 BCE~4160 BCE · 1 eruzioni · VEI max. 41560~1780 · 4 eruzioni · VEI max. 51780~2000 · 16 eruzioni · VEI max. 44600 BCE3060 BCE1300 BCE2401780

Cronologia dettagliata

  1. 2000VEI 1Osservata
    2000-09-04 – 2000-11-08
  2. 1998VEI 2Osservata
    1998-10-25 – 1998-10-25
    1996 crater
  3. 1996VEI 1Osservata
    1996-03-05 – 1996-03-12
    1929 crater and summit crater fissure
  4. 1942VEI 3Osservata
    1942-11-16 – 1942-11-18
    NW-SE 1.6-km fissure
  5. 1937VEI 1Osservata
    1937-03-17 – 1937-03-19
  6. 1935VEI ?Stima geologica
    1935-10-15 – 1935-10-15
  7. 1929VEI 4Osservata
    1929-06-17 – 1929-09-06
    SE and NE of Ansei Crater
  8. 1928VEI 1Osservata
    1928-03-28 – In corso
  9. 1924VEI 2Osservata
    1924-07-31 – In corso
  10. 1923VEI 2Osservata
    1923-02-27 – 1923-03-15
  11. 1922VEI 2Osservata
    1922-05-22 – In corso
  12. 1919VEI 2Osservata
    1919-06-17 – 1919-07-26
    SE of Ansei Crater
  13. 1905VEI 2Osservata
    1905-08-19 – 1905-09-01
    South of Ansei Crater
  14. 1888VEI 2Osservata
    1888-04-14 – In corso
    NW side of 1856 (Ansei) crater
  15. 1856VEI 4Osservata
    1856-09-25 – In corso
    Ansei Crater
  16. 1784VEI 2Stima geologica
    1784-02-08 – In corso
  17. 1765VEI 2Stima geologica
    1765 – In corso
  18. 1710VEI ?Stima geologica
    1710-06-27 – In corso
  19. 1694VEI 4Osservata
    1694-07-04 – 1694-07-06
  20. 1640VEI 5Osservata
    1640-07-31 – 1640-10-09
  21. 4350 a.C.VEI 4Stima geologica
    BCE 4350 – In corso
  22. 4500 a.C. (±150 anni)VEI ?Stima geologica
    BCE 4500 – In corso
  23. 4600 a.C. (±50 anni)VEI 5Stima geologica
    BCE 4600 – In corso

Link esterni

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