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Izu Ōshima

Izu-Oshima

Stratovulcano · Japan · 746 m

A plume rises from the crater of Miharayama on Oshima island. It lies within a 4-km-wide caldera, the rim of which is prominently visible in this aerial photo from the SW. Dark-colored lava flows from the 1986 eruption cover part of the caldera floor. More than 40 cones are located within the caldera and along two parallel rift zones trending NNW-SSE across the island. The port city of Motomachi on the west coast is to the left and the island's airport is at the upper left.
A plume rises from the crater of Miharayama on Oshima island. It lies within a 4-km-wide caldera, the rim of which is prominently visible in this aerial photo from the SW. Dark-colored lava flows from the 1986 eruption cover part of the caldera floor. More than 40 cones are located within the caldera and along two parallel rift zones trending NNW-SSE across the island. The port city of Motomachi on the west coast is to the left and the island's airport is at the upper left. · Foto: Photo by Ichio Moriya (Kanazawa University). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Japan
Regione
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
Altitudine
746 m
Coordinate
34.724, 139.394
Ultima eruzione
1990
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Composite
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Izu-Oshima volcano in Sagami Bay, east of the Izu Peninsula, is the northernmost of the Izu Islands. The broad, low stratovolcano forms an 11 x 13 km island constructed over the remnants of three older dissected stratovolcanoes. It is capped by a 4-km-wide caldera with a central cone, Miharayama, that has been the site of numerous recorded eruptions datining back to the 7th century CE. More than 40 cones are located within the caldera and along two parallel rift zones trending NNW-SSE. Although it is a dominantly basaltic volcano, strong explosive activity has occurred at intervals of 100-150 years throughout the past few thousand years. A major eruption in 1986 produced spectacular lava fountains up to 1,600 m high and a 16-km-high eruption column; more than 12,000 people were evacuated from the island.

Sintesi da Wikipedia

Izu Ōshima è un'isola vulcanica dell'arcipelago giapponese delle Izu (伊豆諸島), situate al largo della costa centro-orientale di Honshū, la maggiore isola del paese.

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
8450 BCE~8102 BCE · 1 eruzioni · VEI max. ?8102 BCE~7754 BCE · 1 eruzioni · VEI max. ?7754 BCE~7406 BCE · 1 eruzioni · VEI max. ?7406 BCE~7058 BCE · 1 eruzioni · VEI max. ?6710 BCE~6362 BCE · 2 eruzioni · VEI max. ?6362 BCE~6014 BCE · 1 eruzioni · VEI max. ?5666 BCE~5318 BCE · 2 eruzioni · VEI max. ?4970 BCE~4622 BCE · 1 eruzioni · VEI max. ?4622 BCE~4274 BCE · 1 eruzioni · VEI max. ?4274 BCE~3926 BCE · 2 eruzioni · VEI max. ?3926 BCE~3578 BCE · 2 eruzioni · VEI max. ?2882 BCE~2534 BCE · 1 eruzioni · VEI max. ?1490 BCE~1142 BCE · 2 eruzioni · VEI max. ?1142 BCE~794 BCE · 2 eruzioni · VEI max. 2794 BCE~446 BCE · 1 eruzioni · VEI max. 3446 BCE~98 BCE · 1 eruzioni · VEI max. 398 BCE~250 · 1 eruzioni · VEI max. 3250~598 · 3 eruzioni · VEI max. 4598~946 · 12 eruzioni · VEI max. 4946~1294 · 3 eruzioni · VEI max. 41294~1642 · 13 eruzioni · VEI max. 41642~1990 · 54 eruzioni · VEI max. 38450 BCE6014 BCE3230 BCE794 BCE1642

Cronologia dettagliata

  1. 1990VEI 2Osservata
    1990-10-04 – 1990-10-04
    Mihara-yama (1987 summit crater)
  2. 1987VEI 2Osservata
    1987-11-16 – 1988-01-27
    Mihara-yama
  3. 1986VEI 3Osservata
    1986-11-15 – 1986-12-18
    Mihara-yama, N part and NW of caldera
  4. 1974VEI 1Osservata
    1974-02-28 – 1974-06-20
    Mihara-yama
  5. 1971VEI 1Osservata
    1971-04-05 – 1971-04-05
    Mihara-yama
  6. 1970VEI 1Osservata
    1970-01-26 – 1970-01-31
    Mihara-yama
  7. 1970VEI 1Osservata
    1970-06-30 – 1970-11-12
    Mihara-yama
  8. 1969VEI 1Osservata
    1969-01-19 – 1969-07-16
    Mihara-yama
  9. 1968VEI 1Osservata
    1968-01-19 – 1968-01-19
    Mihara-yama
  10. 1968VEI 1Osservata
    1968-07-28 – 1968-07-28
    Mihara-yama
  11. 1967VEI 1Osservata
    1967-05-16 – 1967-08-16
    Mihara-yama
  12. 1965VEI 1Osservata
    1965-11-25 – 1966-06-13
    Mihara-yama
  13. 1962VEI 1Osservata
    1962-01-16 – 1965-05-16
    Mihara-yama
  14. 1961VEI ?Stima geologica
    1961-07-02 – In corso
    Mihara-yama
  15. 1959VEI 1Osservata
    1959-01-16 – 1959-01-16
    Mihara-yama
  16. 1959VEI 1Osservata
    1959-10-16 – 1960-11-16
    Mihara-yama
  17. 1958VEI 1Osservata
    1958-04-17 – 1958-06-13
    Mihara-yama
  18. 1957VEI 1Osservata
    1957-08-16 – 1957-12-16
    Mihara-yama
  19. 1956VEI 1Osservata
    1956-01-03 – 1956-01-06
    Mihara-yama
  20. 1956VEI 1Stima geologica
    1956-08-25 – 1956-08-26
    Mihara-yama
  21. 1953VEI 1Osservata
    1953-10-05 – 1954-02-08
    Mihara-yama
  22. 1950VEI 2Osservata
    1950-07-16 – 1951-06-28
    Mihara-yama, south rim
  23. 1940VEI 1Osservata
    1940-08-18 – 1940-08-19
    Mihara-yama
  24. 1939VEI 1Osservata
    1939-02 – 1939-02
    Mihara-yama
  25. 1939VEI 1Osservata
    1939-09-01 – 1939-09-16
    Mihara-yama
  26. 1938VEI 1Osservata
    1938-08-11 – 1938-08-11
    Mihara-yama
  27. 1937VEI 0Osservata
    1937-07-17 – 1937-08
    Mihara-yama
  28. 1935VEI 0Osservata
    1935-04-26 – 1935-05-06
    Mihara-yama
  29. 1934VEI 0Osservata
    1934-04-15 – 1934-04-25
    Mihara-yama
  30. 1934VEI ?Stima geologica
    1934-09 – In corso
    Mihara-yama
  31. 1933VEI 0Osservata
    1933-10-14 – 1933-11
    Mihara-yama
  32. 1928VEI 2Osservata
    1928-08-07 – 1928-08-08
    Mihara-yama
  33. 1922VEI 1Osservata
    1922-12-08 – 1923-01-30
    Mihara-yama
  34. 1920VEI ?Stima geologica
    1920 – In corso
    Mihara-yama
  35. 1919VEI 0Osservata
    1919-05-18 – 1919-12-23
    Mihara-yama
  36. 1915VEI 2Osservata
    1915-10-10 – 1915-10-25
    Mihara-yama
  37. 1914VEI 2Osservata
    1914-05-15 – 1914-05-26
    Mihara-yama
  38. 1912VEI 1Osservata
    1912-02-23 – 1913-01-25
    Mihara-yama
  39. 1910VEI 1Osservata
    1910-12 – In corso
    Mihara-yama
  40. 1876VEI 2Osservata
    1876-12-27 – 1877-02-05
    Mihara-yama
  41. 1870VEI 2Osservata
    1870 – In corso
    Mihara-yama
  42. 1868VEI ?Stima geologica
    1868-12-31 – In corso
    Mihara-yama
  43. 1846VEI 2Osservata
    1846 – In corso
    Mihara-yama
  44. 1837VEI 2Stima geologica
    1837 – 1838
    Mihara-yama
  45. 1827VEI ?Stima geologica
    1827 – In corso
    Mihara-yama
  46. 1822VEI 2Osservata
    1822 – 1824
    Mihara-yama
  47. 1821VEI 3Stima geologica
    1821 – In corso
  48. 1803VEI 2Osservata
    1803-09-26 – 1803-11-14
    Mihara-yama
  49. 1792VEI 2Osservata
    1792 – In corso
    Mihara-yama
  50. 1789VEI 2Osservata
    1789 – In corso
    Mihara-yama
  51. 1783VEI 2Osservata
    1783 – 1786
    Mihara-yama
  52. 1777VEI 3Osservata
    1777-08-31 – 1779
    Mihara-yama & flanks
  53. 1695VEI ?Osservata
    1695-04-12 – In corso
  54. 1684VEI 3Osservata
    1684-02-14 – 1690
  55. 1637VEI ?Osservata
    1637-08-26 – 1638-04
  56. 1634VEI ?Osservata
    1634 – In corso
  57. 1623VEI ?Osservata
    1623 – In corso
  58. 1612VEI ?Osservata
    1612-10-15 – In corso
  59. 1600VEI ?Osservata
    1600-10 – In corso
  60. 1552VEI 3Osservata
    1552-10-07 – 1552-10-15
  61. 1471VEI 2Stima geologica
    1471 – In corso
  62. 1442VEI ?Osservata
    1442-08 – 1443
  63. 1421VEI 4Osservata
    1421-05-14 – In corso
    Summit, S flank
  64. 1416VEI 2Osservata
    1416-09-02 – 1417
  65. 1415VEI ?Osservata
    1415-05-21 – In corso
  66. 1338VEI 3Osservata
    1338-09-15 – 1338-11-15
  67. 1307VEI 3Stima geologica
    1307 – In corso
    NW flank
  68. 1245VEI 1Stima geologica
    1245 – In corso
  69. 1183VEI 4Stima geologica
    1183 – In corso
  70. 1112VEI ?Stima geologica
    1112-11-18 – 1112-12-26
  71. 936VEI ?Stima geologica
    936 – In corso
  72. 886VEI 4Osservata
    886-06-29 – In corso
  73. 854VEI 4Osservata
    854-09-14 – 856
  74. 838VEI 3Osservata
    838-08 – In corso
    Summit, SE flank
  75. 822VEI 3Stima geologica
    822 – In corso
  76. 713VEI 3Stima geologica
    713 – In corso
    Summit, N & S flanks
  77. 700VEI 3Stima geologica
    700 – In corso
  78. 684VEI ?Osservata
    684-11-29 – In corso
  79. 680VEI 4Osservata
    680 – 681-03-26
  80. 654VEI 3Osservata
    654 – In corso
  81. 625VEI 3Stima geologica
    625 – In corso
  82. 600VEI 3Stima geologica
    600 – In corso
  83. 580VEI 3Stima geologica
    580 – In corso
  84. 340 (±200 anni)VEI 4Stima geologica
    340 – In corso
    Summit and east flank
  85. 250 (±100 anni)VEI 3Stima geologica
    250 – In corso
  86. 150 (±50 anni)VEI 3Stima geologica
    150 – In corso
  87. 150 a.C.VEI 3Stima geologica
    BCE 150 – In corso
  88. 600 a.C. (±500 anni)VEI 3Stima geologica
    BCE 600 – In corso
  89. 900 a.C. (±100 anni)VEI 2Stima geologica
    BCE 900 – In corso
    SE flank
  90. 1050 a.C. (±200 anni)VEI ?Stima geologica
    BCE 1050 – In corso
  91. 1200 a.C.VEI ?Stima geologica
    BCE 1200 – In corso
  92. 1450 a.C.VEI ?Stima geologica
    BCE 1450 – In corso
  93. 2550 a.C.VEI ?Stima geologica
    BCE 2550 – In corso
  94. 3650 a.C.VEI ?Stima geologica
    BCE 3650 – In corso
  95. 3750 a.C.VEI ?Stima geologica
    BCE 3750 – In corso
  96. 4000 a.C. (±300 anni)VEI ?Stima geologica
    BCE 4000 – In corso
  97. 4250 a.C.VEI ?Stima geologica
    BCE 4250 – In corso
  98. 4450 a.C.VEI ?Stima geologica
    BCE 4450 – In corso
  99. 4920 a.C. (±500 anni)VEI ?Stima geologica
    BCE 4920 – In corso
  100. 5450 a.C. (±75 anni)VEI ?Stima geologica
    BCE 5450 – In corso
  101. 5550 a.C.VEI ?Stima geologica
    BCE 5550 – In corso
  102. 6050 a.C. (±500 anni)VEI ?Stima geologica
    BCE 6050 – In corso
  103. 6550 a.C.VEI ?Stima geologica
    BCE 6550 – In corso
  104. 6650 a.C.VEI ?Stima geologica
    BCE 6650 – In corso
  105. 7150 a.C. (±500 anni)VEI ?Stima geologica
    BCE 7150 – In corso
  106. 7650 a.C.VEI ?Stima geologica
    BCE 7650 – In corso
  107. 8050 a.C. (±500 anni)VEI ?Stima geologica
    BCE 8050 – In corso
  108. 8450 a.C.VEI ?Stima geologica
    BCE 8450 – In corso

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