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Mount Iō

Kikai

Kaldera · 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
Tipe
Kaldera
Negara
Japan
Wilayah
Western Pacific Volcanic Regions / Ryukyu Volcanic Arc
Ketinggian
704 m
Koordinat
30.793, 130.305
Letusan terakhir
2025
Kondisi tektonik
Subduction zone / Oceanic crust (< 15 km)
Bentuk lahan
Caldera
Batuan utama
Rhyolite
Ringkasan geologi

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.

Ringkasan Wikipedia

Ringkasan Inggris

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.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
4350 BCE~4137 BCE · 1 letusan · VEI maks. 73287 BCE~3075 BCE · 1 letusan · VEI maks. ?2650 BCE~2437 BCE · 1 letusan · VEI maks. ?2012 BCE~1800 BCE · 1 letusan · VEI maks. ?1162 BCE~950 BCE · 1 letusan · VEI maks. 2312 BCE~100 BCE · 1 letusan · VEI maks. ?325~538 · 1 letusan · VEI maks. 3750~963 · 2 letusan · VEI maks. 3963~1175 · 2 letusan · VEI maks. ?1175~1388 · 1 letusan · VEI maks. ?1388~1600 · 1 letusan · VEI maks. ?1813~2025 · 17 letusan · VEI maks. 24350 BCE2862 BCE1162 BCE3251813

Garis waktu rinci

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

Tautan eksternal

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