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Kuju Mountains

Kujusan

Stratovulcano · Japan · 1791 m

The Kuju volcano group in northern Kyushu consists of more than ten cones and lava domes NE of Aso caldera. This view from the E shows Mimatayama (right) and Nakadake (left) lava domes, which formed about 10,000-12,000 years ago. Gas-and-steam plumes rising from fumaroles are seen here in 1994 on the flank of Hosshozan (center), the site of small phreatic explosions in November 1995. Many hot springs and hydrothermal fields are located at the Kuju complex.
The Kuju volcano group in northern Kyushu consists of more than ten cones and lava domes NE of Aso caldera. This view from the E shows Mimatayama (right) and Nakadake (left) lava domes, which formed about 10,000-12,000 years ago. Gas-and-steam plumes rising from fumaroles are seen here in 1994 on the flank of Hosshozan (center), the site of small phreatic explosions in November 1995. Many hot springs and hydrothermal fields are located at the Kuju complex. · Foto: Photo by Yasuo Miyabuchi, 1994 (Forestry and Forest Products Research Institute, Kyushu). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Japan
Regione
Western Pacific Volcanic Regions / Nankai Volcanic Arc
Altitudine
1791 m
Coordinate
33.086, 131.249
Ultima eruzione
1996
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Kujusan is a complex of stratovolcanoes and lava domes lying NE of Aso caldera in north-central Kyushu. The group consists of 16 andesitic lava domes, five andesitic stratovolcanoes, and one basaltic cone. Activity dates back about 150,000 years. Six major andesitic-to-dacitic tephra deposits, many associated with the growth of lava domes, have been recorded during the Holocene. Eruptive activity has migrated systematically eastward during the past 5000 years. The latest magmatic activity occurred about 1600 years ago, when Kurodake lava dome at the E end of the complex was formed. The first reports of historical eruptions were in the 17th and 18th centuries, when phreatic or hydrothermal activity occurred. There are also many hot springs and hydrothermal fields. A fumarole on Hosho lava dome was the site of a sulfur mine for at least 500 years. Two geothermal power plants are in operation at Kuju.

Sintesi da Wikipedia

Riassunto in inglese

Mount Kujū , located on the border of Kokonoe and Taketa in Ōita Prefecture, Japan, is a stratovolcano in Kyushu Island, Japan, with a summit elevation of 1,791 metres (5,876 ft). It is one of the 100 Famous Japanese Mountains. It is part of the Aso-Kujū National Park.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
9160 BCE~8788 BCE · 1 eruzioni · VEI max. 47301 BCE~6929 BCE · 1 eruzioni · VEI max. ?4698 BCE~4326 BCE · 1 eruzioni · VEI max. ?3954 BCE~3582 BCE · 1 eruzioni · VEI max. 43211 BCE~2839 BCE · 1 eruzioni · VEI max. ?2467 BCE~2095 BCE · 1 eruzioni · VEI max. 41723 BCE~1351 BCE · 1 eruzioni · VEI max. ?1351 BCE~980 BCE · 1 eruzioni · VEI max. 4236 BCE~136 · 1 eruzioni · VEI max. 4136~508 · 1 eruzioni · VEI max. 31623~1995 · 4 eruzioni · VEI max. 29160 BCE6557 BCE3582 BCE980 BCE1623

Cronologia dettagliata

  1. 1995VEI 1Osservata
    1995-10-11 – 1996-03-24
    Hosho lava dome (east flank)
  2. 1738VEI 2Stima geologica
    1738-08-13 – In corso
  3. 1675VEI 2Osservata
    1675-06 – In corso
  4. 1662VEI 2Osservata
    1662-01-26 – In corso
  5. 370 (±40 anni)VEI 3Stima geologica
    370 – In corso
    Kuro-dake
  6. 100 a.C. (±300 anni)VEI 4Stima geologica
    BCE 100 – In corso
    Komekubo crater
  7. 990 a.C. (±940 anni)VEI 4Stima geologica
    BCE 990 – In corso
    Komekubo crater
  8. 1720 a.C. (±300 anni)VEI ?Stima geologica
    BCE 1720 – In corso
    Taisen-Minami
  9. 2440 a.C. (±300 anni)VEI 4Stima geologica
    BCE 2440 – In corso
    Danbaru
  10. 3110 a.C. (±500 anni)VEI ?Stima geologica
    BCE 3110 – In corso
    Iwaigo-dake, Ogigahana, Hizengajo
  11. 3780 a.C. (±500 anni)VEI 4Stima geologica
    BCE 3780 – In corso
    Taisen-Hokubu lava dome
  12. 4490 a.C. (±500 anni)VEI ?Stima geologica
    BCE 4490 – In corso
    Tachi-san, Gakurokuji
  13. 7180 a.C. (±2640 anni)VEI ?Stima geologica
    BCE 7180 – In corso
    Sensui-zan
  14. 9160 a.C. (±1190 anni)VEI 4Stima geologica
    BCE 9160 – In corso

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.