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Mount Iō

Kikai

Caldera · Japan · 704 m

Kikai is a mostly submerged 19-km-wide caldera S of Kyushu that was the source of one of the world's largest Holocene eruptions about 6,300 years ago. Pyroclastic flows traveled across the sea for a total distance of 100 km and devastated southern and central Kyushu. This view from near the summit of the post-caldera Iwodake cone shows the W rim of Kikai caldera forming the peninsula (upper left) behind the Inamuradake scoria cone.
Kikai is a mostly submerged 19-km-wide caldera S of Kyushu that was the source of one of the world's largest Holocene eruptions about 6,300 years ago. Pyroclastic flows traveled across the sea for a total distance of 100 km and devastated southern and central Kyushu. This view from near the summit of the post-caldera Iwodake cone shows the W rim of Kikai caldera forming the peninsula (upper left) behind the Inamuradake scoria cone. · Foto: Photo by Yasuo Miyabuchi, 1996 (Forestry and Forest Products Research Institute, Kyushu). · Wikimedia Commons
Tipo
Caldera
Paese
Japan
Regione
Western Pacific Volcanic Regions / Ryukyu Volcanic Arc
Altitudine
704 m
Coordinate
30.793, 130.305
Ultima eruzione
2025
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Caldera
Roccia principale
Rhyolite
Sintesi geologica

Multiple eruption centers have exhibited recent activity at Kikai, a mostly submerged, 19-km-wide caldera near the northern end of the Ryukyu Islands south of Kyushu. It was the source of one of the world's largest Holocene eruptions about 6,300 years ago when rhyolitic pyroclastic flows traveled across the sea for a total distance of 100 km to southern Kyushu, and ashfall reached the northern Japanese island of Hokkaido. The eruption devastated southern and central Kyushu, which remained uninhabited for several centuries. Post-caldera eruptions formed Iodake (or Iwo-dake) lava dome and Inamuradake scoria cone, as well as submarine lava domes. Recorded eruptions have occurred at or near Satsuma-Iojima (also known as Tokara-Iojima), a small 3 x 6 km island forming part of the NW caldera rim. Showa-Iojima lava dome (also known as Iojima-Shinto), a small island 2 km E of Satsuma-Iojima, was formed during submarine eruptions in 1934 and 1935. Mild-to-moderate explosive eruptions have occurred during the past few decades from Iodake, a rhyolitic lava dome at the eastern end of Satsuma-Iojima.

Sintesi da Wikipedia

Riassunto in inglese

Mount Iō, also known as Mount Iwo, is an active rhyolitic lava dome on Iōjima in Kagoshima Prefecture, Japan. It sits within the borders of the town of Mishima.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
4350 BCE~4137 BCE · 1 eruzioni · VEI max. 73287 BCE~3075 BCE · 1 eruzioni · VEI max. ?2650 BCE~2437 BCE · 1 eruzioni · VEI max. ?2012 BCE~1800 BCE · 1 eruzioni · VEI max. ?1162 BCE~950 BCE · 1 eruzioni · VEI max. 2312 BCE~100 BCE · 1 eruzioni · VEI max. ?325~538 · 1 eruzioni · VEI max. 3750~963 · 2 eruzioni · VEI max. 3963~1175 · 2 eruzioni · VEI max. ?1175~1388 · 1 eruzioni · VEI max. ?1388~1600 · 1 eruzioni · VEI max. ?1813~2025 · 17 eruzioni · VEI max. 24350 BCE2862 BCE1162 BCE3251813

Cronologia dettagliata

  1. 2025VEI 1Osservata
    2025-12-29 – 2025-12-29
    Iodake Crater
  2. 2024VEI 1Osservata
    2024-09-01 – 2024-09-03
    Satsuma Iwo-jima (Iodake Crater)
  3. 2023VEI ?Osservata
    2023-03-27 – 2023-07-31
  4. 2020VEI 1Osservata
    2020-04-29 – 2020-04-29
  5. 2020VEI 1Osservata
    2020-10-06 – 2020-10-06
  6. 2019VEI 2Osservata
    2019-11-02 – 2019-11-02
  7. 2013VEI 1Osservata
    2013-06-04 – 2013-06-04
    Iodake
  8. 2004VEI 2Osservata
    2004-03-05 – 2004-10-16
    Iwo-dake
  9. 2003VEI 2Osservata
    2003-02-16 – 2003-10-16
    Iwo-dake
  10. 2002VEI 2Osservata
    2002-05-11 – 2002-07-16
    Iwo-dake
  11. 2000VEI 2Osservata
    2000-01-16 – 2000-03-16
    Iwo-dake
  12. 2000VEI 1Osservata
    2000-10-16 – 2001-12-16
    Iwo-dake
  13. 1998VEI 2Osservata
    1998-04-25 – 1999-08-16
    Iwo-dake
  14. 1997VEI 1Osservata
    1997-07-02 – In corso
    Iwo-dake
  15. 1988VEI 1Osservata
    1988-01-18 – 1988-01-18
    Iwo-dake
  16. 1934VEI 2Osservata
    1934-09-19 – 1935-08
    2 km east of Tokara-Iwo-Jima
  17. 1914VEI ?Stima geologica
    1914-02-13 – In corso
    Tokara-Iwo-jima
  18. 1430 (±75 anni)VEI ?Stima geologica
    1430 – In corso
    Iwo-dake
  19. 1340 (±30 anni)VEI ?Stima geologica
    1340 – In corso
    Iwo-dake
  20. 1030 (±40 anni)VEI ?Stima geologica
    1030 – In corso
    Iwo-dake
  21. 1010 (±40 anni)VEI ?Stima geologica
    1010 – In corso
    Iwo-dake
  22. 830 (±40 anni)VEI ?Stima geologica
    830 – In corso
    Iwo-dake
  23. 750VEI 3Stima geologica
    750 – In corso
    Iwo-dake
  24. 390 (±100 anni)VEI 3Stima geologica
    390 – In corso
    Iwo-dake
  25. 280 a.C. (±75 anni)VEI ?Stima geologica
    BCE 280 – In corso
    Iwo-dake
  26. 1090 a.C. (±100 anni)VEI 2Stima geologica
    BCE 1090 – In corso
    Inamura-dake
  27. 1830 a.C. (±75 anni)VEI ?Stima geologica
    BCE 1830 – In corso
    Inamura-dake
  28. 2450 a.C. (±840 anni)VEI ?Stima geologica
    BCE 2450 – In corso
    Old Iwo-dake
  29. 3250 a.C. (±75 anni)VEI ?Stima geologica
    BCE 3250 – In corso
    Old Iwo-dake
  30. 4350 a.C.VEI 7Stima geologica
    BCE 4350 – In corso
    Kikai caldera

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