Mount Iō (Shiretoko)

Mount Iō (硫黄山, Iō-zan) also Mount Iwo is an active andesitic stratovolcano on the Shiretoko Peninsula of Hokkaidō, Japan. It sits within the borders of the town of Shari. Mount Iō is known for erupting liquid sulphur in the eruptions of 1889 and 1936.[3] Mount Iō literally means, sulphur mountain. There are two explosion craters and a lava dome at the summit of the volcano.[4] A different volcano with a similar name, in SW Japan erupted in April 2018.

Mount Iō
硫黄山
Mount Iō and Kamuiwakka Falls (August 2014)
Highest point
Elevation1,562.0 m (5,124.7 ft) [1]
Prominence243 m (797 ft) [1]
Parent peakMount Sashirui
ListingList of mountains in Japan
List of volcanoes in Japan
Coordinates44°8′0″N 145°9′40″E [1]
Naming
English translationSulphur Mountain
Language of nameJapanese
Geography
Mount Iō
Location of Mount Iō in Japan.
LocationHokkaidō, Japan
Parent rangeShiretoko Peninsula
Topo mapGeospatial Information Authority, 25000:1 硫黄山
50000:1 羅臼
Geology
Mountain typeStratovolcano
Volcanic arc/beltKuril arc[2]
Last eruption1936

History of eruptions

Volcanic activity started at least 240,000 years ago.[4] Mount Iō has erupted at the following times:[3]

  1. 850 AD ± 500 years
  2. 1857–1858
  3. 23–26 September 1876
  4. 24–26 November 1880
  5. 9–26 August 1889
  6. 15 June 1890–unknown
  7. December 1935–October 1936

This is not the volcano that erupted in April 2018, which is in the Miyazaki Prefecture in SW Japan.[5]

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References
  1. Geospatial Information Authority map 25000:1 硫黄山, last access May 23, 2008
  2. Hunt, Paul (1988). Hiking in Japan: An Adventurer's Guide to the Mountain Trails. Tokyo: Kodansha International Ltd. ISBN 0-87011-893-5.
  3. Global Volcanism Program, article on Mount Iō, last access 23 May 2008
  4. 神沼克伊,小山悦郎 日本の火山を科学する　日本列島津々浦々、あなたの身近にある108の活火山とは？ ソフトバンククリエイティブ 2011. ISBN 978-4797361308.
  5. https://www.japantimes.co.jp/news/2018/04/20/national/mount-io-goes-silent-first-eruption-250-years/#.WtnmjS7wZaR

See also


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