Banua Wuhu
"The Banua Wuhu submarine volcano in the Sangihe Islands rises more than 400 m from the sea floor to form a shoal less than 5 m below sea level. Several ephemeral islands were constructed during the 19th and 20th centuries. An island 90 m high was formed in 1835, but dwindled to only a few rocks by 1848. A new island formed in 1889 was 50 m high in 1894. Five new craters were formed during an eruption that built a new island in 1904. Another new island that formed in 1919 had disappeared by 1935."  -Smithsonian Volcano Archive
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