Nipesotsu-Maruyama

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Mount Nipesotsu and Mount Upepesanke, lava domes located within the Nipesotsu-Maruyama volcanic group. Volcanoes referred to as Io by locals and tourists. "Io" means "sulphur" in Japanese.

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One lava dome within the complex. Two eruptions have been at the Maru-yama vent in 1000 and 1898. Both eruptions were moderate in size. The 1898 eruption was phreatic.

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A crater at Nipesotsu-Upepesanke.

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Solfatara at Nipesotsu-Upepesanke.

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Nipesotsu-Upepesanke's namesake, sulphur.

All photographs courtesy of and copyrighted by Mike Lyvers.

Sources of Information:

Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.