Fire fountaining eruptions from the summit crater have produced lava flows in 1870, February 1949, and May-September 1954.
The most recent eruption at Ngauruhoe was in February of 1977.
Other images of
McClelland, L., Simkin, T., Summers, M., Nielsen, E., and Stein, T.C., 1989, Global Volcanism 1975-1985: Englewood Cliffs, New Jersey, Prentice Hall, 655 p.
Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.
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