Unzen Onsen

Unzen Onsen is a geothermally heated volcanic hot spring in the Unzen Mountains in Nagasaki prefecture in Japan.[1] It was known of for many years, and in the 1910s was developed into a hot spring community because of its many springs. In 1934 the area was designated as the first national park in Japan.[2]

Unzen Hot Springs, Nagasaki Prefecture

Water profile

The hot mineral water has a high sulfur content, and strong levels of acidity.[2][3] In addition to sulfur, the mineral content includes aluminum, iron, and sulfate. The water temperature is 98°C, and the hot carbonate and hydrogen sulfide gasses that erupt from the springs can be as high as 120°C.[3][1]

See also

References
  1. Yuhara, Kozo; Ehara, Sachio; Tagomori, Koichi (1981). "Estimation of heat discharge rates using infrared measurements by a helicopter-borne thermocamera over the geothermal areas of Unzen volcano, Japan". Journal of Volcanology and Geothermal Research: 98–108. doi:10.1016/0377-0273(81)90017-2. Retrieved 4 August 2020.
  2. "Unzen Onsen (雲仙温泉)". Japan Travel. Retrieved 4 August 2020.
  3. "Unzen Jigoku: Spring quality and efficacy of hot springs". Unzen Tourist Association. Retrieved 4 August 2020.
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