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Miyakejima

Stratovolkan · Japan · 775 m

The craters in the foreground and the lava flow to the right erupted in 1983 from vents on the SW flank of Miyakejima. The 8-km-wide island rises about 1.1 km from the sea floor in the northern Izu Islands, about 200 km SSW of Tokyo. The summit cone of Oyama (upper right) lies within a caldera that formed about 3,000 years ago. Frequent eruptions have occurred since 1085 CE at vents ranging from the summit to below sea level.
The craters in the foreground and the lava flow to the right erupted in 1983 from vents on the SW flank of Miyakejima. The 8-km-wide island rises about 1.1 km from the sea floor in the northern Izu Islands, about 200 km SSW of Tokyo. The summit cone of Oyama (upper right) lies within a caldera that formed about 3,000 years ago. Frequent eruptions have occurred since 1085 CE at vents ranging from the summit to below sea level. · Foto: Photo by Ichio Moriya (Kanazawa University). · Wikimedia Commons
Tipe
Stratovolkan
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
Ketinggian
775 m
Koordinat
34.094, 139.526
Letusan terakhir
2010
Kondisi tektonik
Subduction zone / Oceanic crust (< 15 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

The circular, 8-km-wide island of Miyakejima forms a low-angle stratovolcano that rises about 1,100 m from the sea floor in the northern Izu Islands about 200 km SSW of Tokyo. The basaltic volcano is truncated by small summit calderas, one of which, 3.5 km wide, was formed during a major eruption about 2,500 years ago. Numerous craters and vents, including maars near the coast and radially oriented fissure vents, are present on the flanks. Frequent eruptions have been recorded since 1085 CE at vents ranging from the summit to below sea level, causing much damage on this small populated island. After a three-century-long hiatus ending in 1469 CE, activity has been dominated by flank fissure eruptions sometimes accompanied by minor summit eruptions. A 1.6-km-wide summit crater was slowly formed by subsidence during an eruption in 2000.

Ringkasan Wikipedia

Ringkasan Inggris

Miyake-jima is a volcanic island in the Izu archipelago in the Philippine Sea approximately 180 kilometers (110 mi) southeast of Tokyo, Japan. As with the other islands in the Izu Island group, Miyake-jima forms part of the Fuji-Hakone-Izu National Park.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
6450 BCE~6168 BCE · 1 letusan · VEI maks. 43066 BCE~2784 BCE · 1 letusan · VEI maks. 42220 BCE~1938 BCE · 1 letusan · VEI maks. 31938 BCE~1656 BCE · 1 letusan · VEI maks. 31656 BCE~1374 BCE · 1 letusan · VEI maks. ?1374 BCE~1092 BCE · 1 letusan · VEI maks. 31092 BCE~810 BCE · 1 letusan · VEI maks. 4810 BCE~528 BCE · 1 letusan · VEI maks. 3246 BCE~36 · 1 letusan · VEI maks. 336~318 · 1 letusan · VEI maks. 4318~600 · 2 letusan · VEI maks. 3600~882 · 3 letusan · VEI maks. 4882~1164 · 2 letusan · VEI maks. 31446~1728 · 6 letusan · VEI maks. 31728~2010 · 17 letusan · VEI maks. 46450 BCE4476 BCE2220 BCE246 BCE1728

Garis waktu rinci

  1. 2010VEI 1Teramati
    2010-04-10 – 2010-07-21
    Summit crater
  2. 2009VEI 1Teramati
    2009-04-01 – 2009-04-01
  3. 2008VEI 1Teramati
    2008-01-07 – 2008-01-07
  4. 2008VEI 1Teramati
    2008-05-08 – 2008-05-08
  5. 2006VEI 1Teramati
    2006-02-17 – 2006-02-17
  6. 2006VEI 1Teramati
    2006-08-23 – 2006-08-23
  7. 2005VEI 1Teramati
    2005-04-12 – 2005-05-18
  8. 2004VEI 1Teramati
    2004-11-30 – 2004-12-09
  9. 2001VEI 2Teramati
    2001-01-11 – 2002-11-24
  10. 2000VEI 3Teramati
    2000-06-27 – 2000-09-28
    Summit and submarine western flank
  11. 1983VEI 3Teramati
    1983-10-03 – 1983-10-04
    SW flank (4.5 km long NE-SW fissure)
  12. 1962VEI 2Teramati
    1962-08-24 – 1962-08-27
    NE flank
  13. 1940VEI 3Teramati
    1940-07-12 – 1940-08-05
    Oyama, NE flank
  14. 1874VEI 3Teramati
    1874-07-03 – 1874-07-17
    NNE flank (560 m)
  15. 1835VEI 2Teramati
    1835-11-11 – Berlangsung
    West flank (east and SE of Ako)
  16. 1811VEI 2Teramati
    1811-01-27 – 1811-01-28
    Summit and NE flank?
  17. 1763VEI 4Teramati
    1763-08-17 – 1769
    Oyama, SSW flank (Shinmio maar)
  18. 1712VEI 3Teramati
    1712-02-04 – 1714
    SW flank (Kuwanoki-daira)
  19. 1709VEI ?Perkiraan geologi
    1709-04-23 – Berlangsung
  20. 1643VEI 3Teramati
    1643-03-31 – 1643-04
    SW flank (SE of Ako, Kuwanoki-daira?)
  21. 1595VEI 2Teramati
    1595-11-22 – Berlangsung
    SE flank
  22. 1535VEI 2Teramati
    1535-03 – Berlangsung
    SE flank
  23. 1469VEI 3Teramati
    1469-12-24 – Berlangsung
    Oyama
  24. 1154VEI 3Teramati
    1154-11 – Berlangsung
    NE flank?
  25. 1085VEI 2Teramati
    1085 – Berlangsung
  26. 850VEI 4Teramati
    850 – Berlangsung
    Oyama and East flank (Mi-ike maar)
  27. 832VEI 3Teramati
    832-06-23 – Berlangsung
  28. 750 (±50 tahun)VEI 3Perkiraan geologi
    750 – Berlangsung
    NE flank
  29. 500 (±50 tahun)VEI 3Perkiraan geologi
    500 – Berlangsung
    Daihannya-yama
  30. 320 (±500 tahun)VEI 3Perkiraan geologi
    320 – Berlangsung
    Sabigahama
  31. 260 (±500 tahun)VEI 4Perkiraan geologi
    260 – Berlangsung
  32. 50 SM (±50 tahun)VEI 3Perkiraan geologi
    BCE 50 – Berlangsung
    Taira-yama
  33. 600 SM (±500 tahun)VEI 3Perkiraan geologi
    BCE 600 – Berlangsung
  34. 950 SM (±200 tahun)VEI 4Perkiraan geologi
    BCE 950 – Berlangsung
    Hatchodaira caldera, S flank (Furumio maar)
  35. 1250 SMVEI 3Perkiraan geologi
    BCE 1250 – Berlangsung
  36. 1450 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 1450 – Berlangsung
    NW flank (NGS scoria layer)
  37. 1800 SM (±50 tahun)VEI 3Perkiraan geologi
    BCE 1800 – Berlangsung
    South flank (Mizutamari maar)
  38. 2000 SM (±100 tahun)VEI 3Perkiraan geologi
    BCE 2000 – Berlangsung
  39. 2900 SM (±500 tahun)VEI 4Perkiraan geologi
    BCE 2900 – Berlangsung
  40. 6450 SM (±500 tahun)VEI 4Perkiraan geologi
    BCE 6450 – Berlangsung
    NW flank

Tautan eksternal

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