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Mashu Volcano | John Seach
Hokkaido, Japan
43.57 N, 144.57 E
summit elevation 855 m
Caldera
Mashu volcano is located in NE Hokkaido, Japan, at the eastern edge of Kutcharo caldera.
A 7 km wide caldera formed 7000 years ago. A summit crater 1.5 km in diameter is located at Kamuinupuri. Lake Mashu is one of the world's clearest lakes.
Eruption in the past 10,000 years are divided into four stages
(late stage of stratovolcano, caldera-forming stage, post-caldera
Kamuinupuri-forming stage, and kamuinupuri).
Further Reading
Katsui, Y., Ando, S. and Inaba, K., 1975. Formation and magmatic evolution of Mashu volcano, east Hokkaido, Japan. Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy, 16(4), pp.533-552.
Miyagi, I., Itoh, J.I., Hoang, N. and Morishita, Y., 2012. Magma systems of the Kutcharo and Mashu volcanoes (NE Hokkaido, Japan): petrogenesis of the medium-K trend and the excess volatile problem. Journal of Volcanology and Geothermal Research, 231, pp.50-60.
Mashu Volcano Eruptions
970 AD approx, 180 AD, 2200 BC, 4880 BC, 5820 BC.