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Giappone · Stratovulcano

Monte Kusatsu-Shirane

Kusatsu-Shiranesan

Tipo
Stratovulcano
Altitudine
2165 m
Ultima eruzione
2018
Monte Kusatsu-Shirane
Foto: 663highland · CC BY 2.5 · Wikimedia Commons
Tipo
Stratovulcano
Paese
Giappone
Regione
Pacifico nord-occidentale / Northeast Japan Volcanic Arc
Altitudine
2165 m
Coordinate
36.618, 138.528
Ultima eruzione
2018
Contesto tettonico
Zona di subduzione / Crosta continentale (> 25 km)
Forma vulcanica
Composito
Roccia principale
Andesite / Andesite basaltica
Sintesi geologica

The Kusatsu-Shiranesan complex, located immediately north of Asama volcano, consists of a series of overlapping pyroclastic cones and three crater lakes. The andesitic-to-dacitic volcano was formed in three eruptive stages beginning in the early to mid-Pleistocene. The Pleistocene Oshi pyroclastic flow produced extensive welded tuffs and non-welded pumice that covers much of the E, S, and SW flanks. The latest eruptive stage began about 14,000 years ago. Historical eruptions have consisted of phreatic explosions from the acidic crater lakes or their margins. Fumaroles and hot springs that dot the flanks have strongly acidified many rivers draining from the volcano. The crater was the site of active sulfur mining for many years during the 19th and 20th centuries.

Sintesi da Wikipedia

Riassunto in inglese

Mount Kusatsu-Shirane is a 2,165 m (7,103 ft) active stratovolcano in Kusatsu, Gunma, Japan. It is called Kusatsu Shirane to differentiate it from the Mount Nikkō-Shirane on the other side of Gunma Prefecture. The summit of Kusatsu-Shirane volcano, located immediately north of Asama volcano, consists of a series of overlapping pyroclastic cones and three crater lakes. The largest of these is Yu-gama, an acidic emerald green lake with rafts of yellow sulfur sometimes seen floating on its surface.

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Storia delle eruzioni

31 registrateGlossario
Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni · Usa le frecce per spostarti tra le barre, Invio per aprire
6550 a.C.~6264 a.C. · 2 eruzioni · VEI max. 33980 a.C.~3694 a.C. · 1 eruzioni · VEI max. 21124 a.C.~838 a.C. · 1 eruzioni · VEI max. 4552 a.C.~267 a.C. · 1 eruzioni · VEI max. 319~304 · 1 eruzioni · VEI max. 21447~1732 · 1 eruzioni · VEI max. ?1732~2018 · 24 eruzioni · VEI max. 36550 a.C.4551 a.C.2266 a.C.267 a.C.1732

Cronologia dettagliata

  1. 2018VEI 1Osservata
    2018-01-23 – 2018-01-23
    Motoshiranesan
  2. 1989VEI 1Metodo non indicato
    1989-01-06 – 1989-01-06
    NW part of Yu-gama
  3. 1983VEI 1Osservata
    1983-07-26 – 1983-12-21
    Yu-gama, Kara-gama
  4. 1982VEI 1Osservata
    1982-10-26 – 1982-12-29
    Kara-gama, Yu-gama
  5. 1976VEI 1Osservata
    1976-03-02 – 1976-03-02
    NE corner of Mizu-gama Crater
  6. 1958VEI 1Osservata
    1958-12-31 – fine sconosciuta
    Yu-gama
  7. 1942VEI 1Osservata
    1942-02-02 – fine sconosciuta
    Fissure east and south of Yu-gama
  8. 1941VEI 1Osservata
    1941-01-19 – 1941-01-19
  9. 1940VEI 1Osservata
    1940-04-07 – 1940-09-13
  10. 1939VEI 1Osservata
    1939-02-16 – 1939-08-28
    Yu-gama
  11. 1938VEI 1Osservata
    1938-07-17 – 1938-10-05
    Yu-gama
  12. 1937VEI 1Osservata
    1937-11-27 – 1938-02-16
    Yu-gama
  13. 1934VEI 2Osservata
    1934-07-02 – fine sconosciuta
  14. 1933VEI ?Metodo non indicato
    1933-07-02 – fine sconosciuta
  15. 1932VEI 3Osservata
    1932-10-01 – 1932-11-16
    NE part of Yu-gama, SE outer rim
  16. 1927VEI 2Osservata
    1927-12-29 – 1927-12-31
    N Yu-gama & S outer rim (in 1927, not 1928)
  17. 1925VEI 2Osservata
    1925-01-22 – 1925-01-30
    Northern part of Yu-gama
  18. 1905VEI 2Osservata
    1905-10-16 – 1905-10-16
    Yu-gama
  19. 1903VEI ?Metodo non indicato
    1903-07-02 – fine sconosciuta
  20. 1902VEI 1Osservata
    1902-07-15 – 1902-09-24
    North side of Yumi-ike
  21. 1900VEI 1Osservata
    1900-10-01 – 1900-10-01
    NE part of Yu-gama
  22. 1897VEI 2Osservata
    1897-07-08 – 1897-08-16
    NE part of Yu-gama
  23. 1882VEI 2Osservata
    1882-08-06 – 1882-08-16
    Yu-gama, NE end of Kara-gama
  24. 1805VEI 2Osservata
    1805-07-02 – fine sconosciuta
    Yu-gama
  25. 1470 (±150 anni)VEI ?Stima geologica
    1470 – fine sconosciuta
  26. 50VEI 2Stima geologica
    50 – fine sconosciuta
    Yu-gama
  27. 550 a.C.VEI 3Stima geologica
    550 a.C. – fine sconosciuta
    Yu-gama
  28. 1120 a.C. (±150 anni)VEI 4Stima geologica
    1120 a.C. – fine sconosciuta
    Moto-Shirane
  29. 3750 a.C.VEI 2Stima geologica
    3750 a.C. – fine sconosciuta
    Shirane
  30. 6270 a.C. (±200 anni)VEI ?Stima geologica
    6270 a.C. – fine sconosciuta
  31. 6550 a.C.VEI 3Stima geologica
    6550 a.C. – fine sconosciuta
    Shirane

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