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Hakkōda Mountains

Hakkodasan

Stratovolkan · Japan · 1585 m

Hakkoda consists of a group of 14 cones and lava domes south of Mutsu Bay at the northern end of Honshu. The NE rim of an 8-km-wide Pleistocene caldera forms an arcuate ridge across the caldera floor to the NE of the Hakkoda group volcanoes, which bury the SE caldera wall. This view looks from the W towards the northern Akakuradake, Idodake, and Hakkodasan volcanoes seen from left to right.
Hakkoda consists of a group of 14 cones and lava domes south of Mutsu Bay at the northern end of Honshu. The NE rim of an 8-km-wide Pleistocene caldera forms an arcuate ridge across the caldera floor to the NE of the Hakkoda group volcanoes, which bury the SE caldera wall. This view looks from the W towards the northern Akakuradake, Idodake, and Hakkodasan volcanoes seen from left to right. · Foto: Photo by Takashi Kudo, 1996 (Hokkaido University). · Wikimedia Commons
Tipe
Stratovolkan
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Ketinggian
1585 m
Koordinat
40.659, 140.877
Letusan terakhir
1550
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

The basaltic-to-rhyolitic Hakkodasan volcano includes at least 17 stratovolcanoes and lava domes south of Mutsu Bay at the northern end of Honshu. The NE rim of an 8-km-wide Pleistocene caldera forms an arcuate ridge across a flat caldera-floor moat NE of the Hakkoda group volcanoes, which bury the SE caldera wall. A northern group of volcanoes, constructed within the caldera, appears to be younger than the southern group. Hakkoda-Odake, Ido-dake, and Tsurugi-dake have well-preserved craters. Akakuradake has a 1-km-wide explosion crater breached to the north. No historical eruptions are known, although an active solfatara occurs at Idodake, and hot springs are found at several locations within the caldera. Three minor phreatic eruptions were documented from Jigokunuma on the SW flank of Odake volcano from the 13th-17th centuries. Three soldiers on a training mission in July 1997 were killed by inhalation of volcanic gas.

Ringkasan Wikipedia

Ringkasan Inggris

The Hakkōda Mountains are an active volcanic complex in south-central Aomori Prefecture, Japan, in Towada-Hachimantai National Park. Often called Mount Hakkōda or simply Hakkōda (八甲田), the mountains are collectively listed as one of the 100 Famous Japanese Mountains. Its highest peak, Mount Ōdake, lies 21.3 kilometers (13.2 mi) southeast of central Aomori and 28 kilometers (17 mi) west of central Towada and has an elevation of 1,585 meters (5,200 ft). The Hakkōda Mountains are a part of the Ōu Mountains which make up part of the Northeastern Japan Arc, a segment of the Pacific Ring of Fire. The volcanic complex consists of fourteen stratovolcanoes and lava domes arranged into two volcanic groups. The Northern Hakkōda Volcanic Group emerges from the rim of an 8-kilometer-wide (5.0 mi) caldera that dates back to the Pleistocene. The Southern Hakkōda Volcanic Group predates the caldera.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
2850 BCE~2650 BCE · 1 letusan · VEI maks. 22250 BCE~2050 BCE · 1 letusan · VEI maks. 31250 BCE~1050 BCE · 1 letusan · VEI maks. 150 BCE~150 · 1 letusan · VEI maks. 1350~550 · 1 letusan · VEI maks. 11150~1350 · 1 letusan · VEI maks. 11350~1550 · 1 letusan · VEI maks. 12850 BCE1850 BCE650 BCE3501350

Garis waktu rinci

  1. 1550 (±100 tahun)VEI 1Perkiraan geologi
    1550 – Berlangsung
    SW flank of O-dake (Jigoku-numa)
  2. 1340 (±75 tahun)VEI 1Perkiraan geologi
    1340 – Berlangsung
    SW flank of O-dake (Jigoku-numa)
  3. 450VEI 1Perkiraan geologi
    450 – Berlangsung
    O-dake
  4. 50 SMVEI 1Perkiraan geologi
    BCE 50 – Berlangsung
    O-dake
  5. 1150 SMVEI 1Perkiraan geologi
    BCE 1150 – Berlangsung
    O-dake
  6. 2250 SMVEI 3Perkiraan geologi
    BCE 2250 – Berlangsung
    O-dake
  7. 2850 SMVEI 2Perkiraan geologi
    BCE 2850 – Berlangsung
    O-dake

Tautan eksternal

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