| Mount Asahi | |
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| 旭岳 | |
Mount Asahi, the tallest peak in Hokkaidō (September 2004) |
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| Elevation | 2,290.9 m (7,516 ft) [1] |
| Prominence | 2,290.9 m (7,516 ft) |
| Listing | List of mountains and hills of Japan by height List of ultra prominent peaks List of volcanoes in Japan |
| Location | |
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Mount Asahi
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| Location | Hokkaidō, Japan |
| Range | Daisetsuzan Volcanic Group |
| Topo map | Geographical Survey Institute 25000:1 旭岳 25000:1 愛山溪温泉 50000:1 大雪山 50000:1 旭岳 |
| Geology | |
| Type | Stratovolcano[2] |
| Age of rock | Holocene[3] |
| Last eruption | 1739 |
Mount Asahi (旭岳 Asahi-dake) is the tallest mountain in Hokkaidō, Japan. Part of the Daisetsuzan Volcanic Group of the Ishikari Mountains, it is located in the northern part of the Daisetsuzan National Park.
The mountain is popular with hikers in the summer and can be easily reached from Asahidake Onsen via Asahidake Ropeway.
Sugatami Pond, directly below the peak, is famous for its reflection of the peaks, snow, and steam escaping from the volcanic vents.
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Sulphur was once mined in the fumarolic areas.[2]
Mount Asahi is an active stratovolcano that arose 3 kilometres (1.9 mi) southwest of the Ohachi-Daira caldera.[2] The Japan Meteorological Agency gave the region rank C[4] in volcanic activity. In addition to the main peak, there is a smaller volcano emerging from the southeast shoulder of the mountain, Mount Ushiro Asahi or Rear Mount Asahi (後旭岳 Ushiro-Asahi-dake). It is a stratovolcano 2,216 metres (7,270 ft) in height.[2] The volcano consists mainly of andesite and dacite.[4] That is Holocene volcanic non-alkali mafic rock less than 18,000 years old.[3]
There is no historical record of the eruptions of Mount Asahi. Tephrochronology and radiocarbon dating have determined the following events:[2]
Mount Asahi currently exhibits steam activity in the form of fumaroles.[4]
Media related to Asahidake at Wikimedia Commons