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Azuma Volcano | John Seach
Honshu, Japan
37.73 N, 140.25 E
summit elevation 2024 m
stratovolcanoes
Azuma volcano consists of a group of stratovolcanoes and shield volcanoes in NE Honshu, Japan.
Historical eruptions have occurred at Issaikyo volcano. Recent craters are aligned along a NW-SE trend, 3 km long, and 1 km wide. Kofujo crater has been the source of 90% of magma erupted. Oana geothermal area has been the site of small phreatic eruptions since 1983.
2001 Earthquakes
There was an increase in seismicity at the volcano in April and May. The earthquake peak occurred during 21-22 May with 51 volcanic events measured. Residents felt 33 earthquakes over the 2 month period.
1996 Earthquakes
Volcanic tremor was detected from April to July 1996.
1977 Eruption
An increase in fumarolic activity was noted at the volcano in February 1977. On 7th December a minor steam explosion occurred at O-ana crater, in the SE part of Issaikyo volcano.
1893 Fatalities
Two scientists were killed by a steam explosion in 1893.
Further Reading
Ban, M., Matsui, R., Iwata, N., Yamamoto, T., Fujinawa, A. and Nakashima, K., 2013. Petrologic characteristics of the newest stage in Azuma volcano group, Northeast Japan. Int. J. Erup. Histo. Informa, 1, pp.1-10.
Azuma Volcano Eruptions
1977, 1966, 1952, 1950, 1914, 1895, 1894, 1893, 1331, 600 AD ± 200, 150 BC ± 200, 950 BC ± 100, 1800 BC ± 50, 2750 BC ± 200, 3000 BC ± 50, 4150 BC ± 500, 4550 BC ± 1000, 5400 BC ± 200, 5700 BC ± 50