An undersea volcano's eruption off Japan three weeks ago has birthed a tiny new island, although it may not last long. The island is about 328 feet in diameter.
An undersea volcano erupted off Japan three weeks ago, providing a rare view of the birth of a tiny new island, but experts say it may not last very long. The unnamed undersea volcano, located about half a mile off the southern coast of Iwo Jima, which Japan calls Ioto, started its latest series of eruptions on Oct. 21. Within 10 days, volcanic ash and rocks piled up on the shallow seabed, its tip rising above the sea surface.
Volcanic activity has increased near Iwo Jima and similar undersea eruptions have occurred in recent years, but the formation of a new island is a significant development, Usui said. Volcanic activity at the site has since subsided, and the newly formed island has somewhat shrunk because its 'crumbly' formation is easily washed away by waves, Usui said. He said experts are still analyzing the development, including details of the deposits.
Also in 2013, a small island surfaced from the seabed after a massive 7.7-magnitude earthquake in Pakistan. In 2015, a new island was formed as a result of a month-long eruption of a submarine volcano off the coast of Tonga. Of about 1,500 active volcanoes in the world, 111 are in Japan, which sits on the so-called Pacific 'ring of fire,' according to the Japan Meteorological Agency.
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