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Mount Iwate

Iwatesan

Gunung api kompleks · Japan · 2038 m

Yakushidake (right) forms the summit of Iwatesan, and is a younger cone that was constructed over the eastern rim of NishiIwate caldera, the left-hand peak in this view from the SE. Eruptions have been recorded since the 17th century, mostly from the 500-m-wide summit crater and flank vents.
Yakushidake (right) forms the summit of Iwatesan, and is a younger cone that was constructed over the eastern rim of NishiIwate caldera, the left-hand peak in this view from the SE. Eruptions have been recorded since the 17th century, mostly from the 500-m-wide summit crater and flank vents. · Foto: Photo by Lee Siebert, 1977 (Smithsonian Institution). · Wikimedia Commons
Tipe
Gunung api kompleks
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Ketinggian
2038 m
Koordinat
39.853, 141.001
Letusan terakhir
1919
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

Viewed from the east, Iwatesan volcano has a symmetrical profile that invites comparison with Fuji, but on the west an older cone is visible containing an oval-shaped, 1.8 x 3 km caldera. After the growth of Nishi-Iwate volcano beginning about 700,000 years ago, activity migrated eastward to form Higashi-Iwate volcano. Iwate has collapsed seven times during the past 230,000 years, most recently between 739 and 1615 CE. The dominantly basaltic summit cone of Higashi-Iwate volcano, Yakushidake, is truncated by a 500-m-wide crater. It rises well above and buries the eastern rim of the caldera, which is breached by a narrow gorge on the NW. A central cone containing a 500-m-wide crater partially filled by a lake is located in the center of the oval-shaped caldera. A young lava flow from Yakushidake descended into the caldera, and a fresh-looking lava flow from the 1732 eruption traveled down the NE flank.

Ringkasan Wikipedia

Ringkasan Inggris

Mount Iwate is a stratovolcano complex in the Ōu Mountains of western Iwate Prefecture, in the Tōhoku region of northern Honshū, Japan. With an elevation of 2,038 metres (6,686 ft), it is the highest in Iwate Prefecture. It is included as one of the 100 famous mountains in Japan, a book composed in 1964 by mountaineer and author Kyūya Fukada. The mountain is on the borders of the municipalities of Hachimantai, Takizawa, and Shizukuishi, west of the prefectural capital of Morioka. Much of the mountain is within the borders of the Towada-Hachimantai National Park. The mountain is also referred to as the "Nanbu Fuji" for its resemblance to Mount Fuji.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
6450 BCE~6171 BCE · 2 letusan · VEI maks. ?5891 BCE~5612 BCE · 1 letusan · VEI maks. ?5053 BCE~4773 BCE · 2 letusan · VEI maks. ?4494 BCE~4214 BCE · 2 letusan · VEI maks. 03935 BCE~3655 BCE · 1 letusan · VEI maks. ?3376 BCE~3096 BCE · 1 letusan · VEI maks. 03096 BCE~2817 BCE · 2 letusan · VEI maks. ?2817 BCE~2537 BCE · 1 letusan · VEI maks. ?2258 BCE~1979 BCE · 2 letusan · VEI maks. ?1699 BCE~1420 BCE · 2 letusan · VEI maks. ?1420 BCE~1140 BCE · 2 letusan · VEI maks. 3581 BCE~302 BCE · 2 letusan · VEI maks. ?22 BCE~257 · 1 letusan · VEI maks. ?1096~1375 · 1 letusan · VEI maks. 31375~1655 · 1 letusan · VEI maks. ?1655~1934 · 6 letusan · VEI maks. 36450 BCE4494 BCE2258 BCE302 BCE1655

Garis waktu rinci

  1. 1934VEI ?Perkiraan geologi
    1934-07 – 1935
  2. 1919VEI 1Teramati
    1919-07-15 – 1919-07-15
    W side of Onigajo caldera (O-jigokudani)
  3. 1732VEI 2Teramati
    1732-01-22 – 1732-10
    NE flank of Yakushi-dake
  4. 1689VEI 2Perkiraan geologi
    1689-06-22 – Berlangsung
  5. 1687VEI 2Perkiraan geologi
    1687-04-14 – 1687-07
  6. 1686VEI 3Teramati
    1686-03-26 – 1686-03-27
  7. 1450 (±100 tahun)VEI ?Perkiraan geologi
    1450 – Berlangsung
    Nishi-Iwate and Higashi-Iwate
  8. 1300 (±50 tahun)VEI 3Perkiraan geologi
    1300 – Berlangsung
    Higashi-Iwate (Myoko-dake)
  9. 150VEI ?Perkiraan geologi
    150 – Berlangsung
    Higashi-Iwate
  10. 350 SMVEI ?Perkiraan geologi
    BCE 350 – Berlangsung
    Higashi-Iwate
  11. 450 SMVEI ?Perkiraan geologi
    BCE 450 – Berlangsung
    Nishi-Iwate (O-jigokudani area)
  12. 1150 SMVEI ?Perkiraan geologi
    BCE 1150 – Berlangsung
    Nishi-Iwate
  13. 1250 SMVEI 3Perkiraan geologi
    BCE 1250 – Berlangsung
    Higashi-Iwate
  14. 1500 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 1500 – Berlangsung
    Higashi-Iwate
  15. 1650 SMVEI ?Perkiraan geologi
    BCE 1650 – Berlangsung
    Nishi-Iwate (O-jigokudani area)
  16. 2000 SMVEI ?Perkiraan geologi
    BCE 2000 – Berlangsung
    Nishi-yama
  17. 2050 SM (±200 tahun)VEI ?Perkiraan geologi
    BCE 2050 – Berlangsung
    Higashi-Iwate
  18. 2700 SM (±200 tahun)VEI ?Perkiraan geologi
    BCE 2700 – Berlangsung
    Higashi-Iwate
  19. 2950 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 2950 – Berlangsung
    Nishi-Iwate
  20. 3050 SMVEI ?Perkiraan geologi
    BCE 3050 – Berlangsung
    Higashi-Iwate
  21. 3250 SM (±500 tahun)VEI 0Perkiraan geologi
    BCE 3250 – Berlangsung
  22. 3750 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 3750 – Berlangsung
    Higashi-Iwate
  23. 4350 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 4350 – Berlangsung
    Higashi-Iwate
  24. 4450 SM (±500 tahun)VEI 0Perkiraan geologi
    BCE 4450 – Berlangsung
    Higashi-Iwate
  25. 4850 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 4850 – Berlangsung
    Nishi-Iwate
  26. 4900 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 4900 – Berlangsung
    Higashi-Iwate
  27. 5650 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 5650 – Berlangsung
    Nishi-Iwate
  28. 6300 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 6300 – Berlangsung
    Nishi-Iwate
  29. 6450 SM (±1600 tahun)VEI ?Perkiraan geologi
    BCE 6450 – Berlangsung

Tautan eksternal

⚠ Untuk referensi saja. Bukan untuk tanggap darurat.