"Kita-Fukutokutai is a newly recognized submarine volcano halfway between Iwo-jima and Minami-Iwo-jima islands. The volcano rises to within 73 m of the sea surface. Water discoloration was reported several times beginning in 1937, and floating pumice was seen in 1953-54. In 1988 a fishing boat reported an eruption column about 100 m high, although the report was not confirmed at the time. The Japan Meteorological Agency, which has responsibility for the oversight of Japanese volcanoes, has classified Kita-Fukutokutai as an active volcano."  -Smithsonian Volcano Archive
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