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Ata Caldera

Ata

Caldera · Japan · 924 m

Kaimon volcano is the youngest and most prominent feature of the Ibusuki volcanic field at the southern tip of Kyushu, seen here from the N. It was constructed during the last 4,000 years and has been the source of historical eruptions in the volcanic field. The Ibusuki field is located W of the Pleistocene Ata caldera and contains numerous small cones, maars, and the 4.5-km-wide Ikedoko caldera.
Kaimon volcano is the youngest and most prominent feature of the Ibusuki volcanic field at the southern tip of Kyushu, seen here from the N. It was constructed during the last 4,000 years and has been the source of historical eruptions in the volcanic field. The Ibusuki field is located W of the Pleistocene Ata caldera and contains numerous small cones, maars, and the 4.5-km-wide Ikedoko caldera. · Foto: Photo by Lee Siebert, 1988 (Smithsonian Institution). · Wikimedia Commons
Tipo
Caldera
Paese
Japan
Regione
Western Pacific Volcanic Regions / Ryukyu Volcanic Arc
Altitudine
924 m
Coordinate
31.220, 130.570
Ultima eruzione
885
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Caldera
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The submerged 15 x 25 km Ata caldera under Kagoshima Bay is one of several large calderas in southern Kyushu and the source of major pyroclastic flows associated with its formation more than 40,000 years ago. The National Catalogue of the Active Volcanoes of Japan (JMA, 2013) included features of the Ibusuki field as part of the Ata post-caldera system. That area consists of numerous central cones and maars, the 4.5-km-wide Ikeda caldera, and Kaimondake stratovolcano. The symmetrical andesitic Kaimondake is the most prominent feature, and is capped by a lava dome. Ibusuki has been very active during the Holocene, forming the Ikeda caldera about 4,600 years ago, numerous maars and lava domes. Kaimondake formed during the last 4,000 years, from which all eruptive activity has occurred after about 2,650 years ago. Its last eruption took place in the 9th century. While listed as features of the Ata caldera, JMA (2013) simultaneously listed Kaimondake and the combination of Ikeda and Yamagawa as distinct volcanoes.

Sintesi da Wikipedia

Riassunto in inglese

Ata Caldera , containing the Ata North Caldera, and the Ata South Caldera, which in turn contains Mount Kaimon and Ikeda Caldera amongst other volcanoes, is a massive, ill defined, mostly submerged volcanic caldera structure associated with the southern portions of Kagoshima Bay.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
5050 BCE~4828 BCE · 1 eruzioni · VEI max. ?2828 BCE~2606 BCE · 1 eruzioni · VEI max. 52162 BCE~1940 BCE · 1 eruzioni · VEI max. 41940 BCE~1717 BCE · 1 eruzioni · VEI max. 41717 BCE~1495 BCE · 3 eruzioni · VEI max. 41495 BCE~1273 BCE · 1 eruzioni · VEI max. ?829 BCE~607 BCE · 2 eruzioni · VEI max. 4384 BCE~162 BCE · 1 eruzioni · VEI max. 4162 BCE~60 · 2 eruzioni · VEI max. 460~282 · 3 eruzioni · VEI max. 4504~726 · 4 eruzioni · VEI max. 4726~949 · 6 eruzioni · VEI max. 41393~1615 · 1 eruzioni · VEI max. ?5050 BCE3495 BCE1717 BCE162 BCE1393

Cronologia dettagliata

  1. 1615VEI ?Stima geologica
    1615-08-07 – In corso
    Kaimon
  2. 885VEI 4Osservata
    885-08-29 – 885-09-28
    Kaimon
  3. 882VEI 2Stima geologica
    882-11 – In corso
    Kaimon
  4. 874VEI 4Osservata
    874-03-29 – 874-07
    Kaimon
  5. 866VEI 2Stima geologica
    866-05 – In corso
    Kaimon
  6. 860VEI 2Stima geologica
    860-04 – In corso
    Kaimon
  7. 770VEI 4Stima geologica
    770 – In corso
    Kaimon
  8. 720VEI 4Stima geologica
    720 – In corso
    Kaimon
  9. 660VEI 4Stima geologica
    660 – In corso
    Kaimon
  10. 600VEI 4Stima geologica
    600 – In corso
    Kaimon
  11. 550VEI 2Stima geologica
    550 – In corso
    Kaimon
  12. 270VEI 3Stima geologica
    270 – In corso
    Kaimon
  13. 150VEI 4Stima geologica
    150 – In corso
    Kaimon
  14. 130VEI 4Stima geologica
    130 – In corso
    Kaimon
  15. 30VEI 3Stima geologica
    30 – In corso
    Kaimon
  16. 80 a.C.VEI 4Stima geologica
    BCE 80 – In corso
    Kaimon
  17. 270 a.C.VEI 4Stima geologica
    BCE 270 – In corso
    Kaimon
  18. 650 a.C.VEI 4Stima geologica
    BCE 650 – In corso
    Kaimon
  19. 700 a.C.VEI 2Stima geologica
    BCE 700 – In corso
    Kaimon
  20. 1450 a.C.VEI ?Stima geologica
    BCE 1450 – In corso
    Mizunashi, Kagami, Ikezoko maars
  21. 1500 a.C.VEI 4Stima geologica
    BCE 1500 – In corso
    Kaimon
  22. 1550 a.C.VEI ?Stima geologica
    BCE 1550 – In corso
    Nabeshima-dake
  23. 1610 a.C.VEI 3Stima geologica
    BCE 1610 – In corso
    Kaimon
  24. 1780 a.C.VEI 4Stima geologica
    BCE 1780 – In corso
    Kaimon
  25. 2010 a.C.VEI 4Stima geologica
    BCE 2010 – In corso
    Kaimon
  26. 2690 a.C. (±75 anni)VEI 5Stima geologica
    BCE 2690 – In corso
    Ikeda-ko caldera
  27. 5050 a.C.VEI ?Stima geologica
    BCE 5050 – In corso
    Unagi, Narikawa and Yamakawa maars

Link esterni

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