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Akita-Komagatake

Stratovolkan · Japan · 1637 m

Onamedake cone and the Amidaike pond are located at the NE end of the summit crater complex of Akita-Komagatake. This cone forms the highest point of the volcano and has produced lava flows to the N and E. This photo is taken from the NE rim of a 1.5 x 3 km caldera partially filled by basaltic cones.
Onamedake cone and the Amidaike pond are located at the NE end of the summit crater complex of Akita-Komagatake. This cone forms the highest point of the volcano and has produced lava flows to the N and E. This photo is taken from the NE rim of a 1.5 x 3 km caldera partially filled by basaltic cones. · Foto: Photo by Ichio Moriya (Kanazawa University). · Wikimedia Commons
Tipe
Stratovolkan
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Ketinggian
1637 m
Koordinat
39.761, 140.799
Letusan terakhir
1971
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

Two calderas partially filled by basaltic cones cut the summit of Akita-Komagatake volcano. The larger southern caldera is 1.5 x 3 km wide and has a shallow sloping floor that is drained through a narrow gap cutting the SW caldera rim. On its northern side is a smaller more circular 1.2-km-wide caldera whose rim is breached widely to the NE. The two calderas were formed following explosive eruptions at the end of the Pleistocene, between about 13,500 and 11,600 years ago. Two cones, Medake and Kodake, occupy the NE corner of the southern caldera, whose long axis trends NE-SW. The Onamedake cone within the northern caldera has produced lava flows to the north and east; it has a 100-m-wide summit crater. Small-scale historical eruptions have occurred from cones and fissure vents inside the southern caldera. The temperatures of geothermal areas increased beginning in 2005, and some fumarolic plumes were observed in 2011-12.

Ringkasan Wikipedia

Ringkasan Inggris

Akita-Komagatake is an active stratovolcano located 10 km east of Tazawa Lake, near the border between Akita and Iwate prefectures on Honshu Island. The volcano last erupted from 18 September 1970 to 25 January 1971. It is the highest mountain in Akita Prefecture and the second highest in Towada-Hachimantai National Park.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
8800 BCE~8441 BCE · 1 letusan · VEI maks. 38441 BCE~8082 BCE · 1 letusan · VEI maks. 48082 BCE~7723 BCE · 1 letusan · VEI maks. 47364 BCE~7005 BCE · 1 letusan · VEI maks. ?6646 BCE~6287 BCE · 1 letusan · VEI maks. 36287 BCE~5928 BCE · 2 letusan · VEI maks. 31620 BCE~1261 BCE · 1 letusan · VEI maks. ?543 BCE~184 BCE · 2 letusan · VEI maks. 3184 BCE~175 · 1 letusan · VEI maks. 2175~534 · 1 letusan · VEI maks. ?534~893 · 1 letusan · VEI maks. 3893~1252 · 1 letusan · VEI maks. 21611~1970 · 4 letusan · VEI maks. 28800 BCE6287 BCE3415 BCE902 BCE1611

Garis waktu rinci

  1. 1970VEI 2Teramati
    1970-09-18 – 1971-01-26
    Me-dake
  2. 1932VEI 2Teramati
    1932-07-21 – 1932-07-24
    Ishibora (south flank of Me-dake)
  3. 1902VEI 1Teramati
    1902 – Berlangsung
    Yoko-dake
  4. 1890VEI 2Teramati
    1890-12 – 1891-01
  5. 1100VEI 2Perkiraan geologi
    1100 – Berlangsung
  6. 807VEI 3Teramati
    807 – Berlangsung
  7. 400 (±500 tahun)VEI ?Perkiraan geologi
    400 – Berlangsung
    Me-dake
  8. 50 SM (±200 tahun)VEI 2Perkiraan geologi
    BCE 50 – Berlangsung
  9. 200 SM (±200 tahun)VEI ?Perkiraan geologi
    BCE 200 – Berlangsung
    Minami-dake, Ko-dake
  10. 350 SM (±200 tahun)VEI 3Perkiraan geologi
    BCE 350 – Berlangsung
  11. 1450 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 1450 – Berlangsung
  12. 5950 SM (±200 tahun)VEI 3Perkiraan geologi
    BCE 5950 – Berlangsung
  13. 6150 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 6150 – Berlangsung
  14. 6350 SM (±200 tahun)VEI 3Perkiraan geologi
    BCE 6350 – Berlangsung
  15. 7100 SM (±900 tahun)VEI ?Perkiraan geologi
    BCE 7100 – Berlangsung
  16. 7850 SM (±200 tahun)VEI 4Perkiraan geologi
    BCE 7850 – Berlangsung
  17. 8300 SM (±300 tahun)VEI 4Perkiraan geologi
    BCE 8300 – Berlangsung
  18. 8800 SM (±300 tahun)VEI 3Perkiraan geologi
    BCE 8800 – Berlangsung

Tautan eksternal

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