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Izu Ōshima

Izu-Oshima

Stratovolkan · 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
Tipe
Stratovolkan
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
Ketinggian
746 m
Koordinat
34.724, 139.394
Letusan terakhir
1990
Kondisi tektonik
Subduction zone / Oceanic crust (< 15 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

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.

Ringkasan Wikipedia

Ringkasan Inggris

Izu Ōshima is an inhabited volcanic island in the Izu archipelago and borders Sagami Bay and the Pacific Ocean, off the coast of Honshu, Japan, 22 km (14 mi) east of the Izu Peninsula and 36 km (22 mi) southwest of Bōsō Peninsula. As with the other islands in the Izu Island group, Izu Ōshima forms part of the Fuji-Hakone-Izu National Park. Izu Ōshima, at 91.06 km2 (35.16 sq mi) is the largest and closest of Tokyo's outlying islands, which also include the Ogasawara Islands.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
8450 BCE~8102 BCE · 1 letusan · VEI maks. ?8102 BCE~7754 BCE · 1 letusan · VEI maks. ?7754 BCE~7406 BCE · 1 letusan · VEI maks. ?7406 BCE~7058 BCE · 1 letusan · VEI maks. ?6710 BCE~6362 BCE · 2 letusan · VEI maks. ?6362 BCE~6014 BCE · 1 letusan · VEI maks. ?5666 BCE~5318 BCE · 2 letusan · VEI maks. ?4970 BCE~4622 BCE · 1 letusan · VEI maks. ?4622 BCE~4274 BCE · 1 letusan · VEI maks. ?4274 BCE~3926 BCE · 2 letusan · VEI maks. ?3926 BCE~3578 BCE · 2 letusan · VEI maks. ?2882 BCE~2534 BCE · 1 letusan · VEI maks. ?1490 BCE~1142 BCE · 2 letusan · VEI maks. ?1142 BCE~794 BCE · 2 letusan · VEI maks. 2794 BCE~446 BCE · 1 letusan · VEI maks. 3446 BCE~98 BCE · 1 letusan · VEI maks. 398 BCE~250 · 1 letusan · VEI maks. 3250~598 · 3 letusan · VEI maks. 4598~946 · 12 letusan · VEI maks. 4946~1294 · 3 letusan · VEI maks. 41294~1642 · 13 letusan · VEI maks. 41642~1990 · 54 letusan · VEI maks. 38450 BCE6014 BCE3230 BCE794 BCE1642

Garis waktu rinci

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

Tautan eksternal

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