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Map of world's major seamounts. A list of active and extinct submarine volcanoes and seamounts located under the world's oceans. There are estimated to be 40,000 to 55,000 seamounts in the global oceans. [1] Almost all are not well-mapped and many may not have been identified at all. Most are unnamed and unexplored.
The Tonga–Kermadec Ridge is an oceanic ridge in the south-west Pacific Ocean underlying the Tonga–Kermadec island arc.It is a result of the most linear, fastest converging, and seismically active subduction boundary on Earth, the Kermadec–Tonga subduction zone, and consequently has the highest density of submarine volcanoes.
The Kermadec–Tonga subduction zone is a convergent plate boundary that stretches from the North Island of New Zealand northward. The formation of the Kermadec and Tonga plates started about 4–5 million years ago. Today, the eastern boundary of the Tonga plate is one of the fastest subduction zones, with a rate up to 24 cm/year (9.4 in/year ...
In the days since Tonga was struck by a massive underwater volcanic eruption Saturday, a thick layer of volcanic ash remained blanketed over the island nation as new devastating images and details ...
The beautiful and terrible majesty of our natural world was on full display Saturday.A massive undersea volcano near the Pacific nation of Tonga erupted with such force that it prompted near ...
Bermuda rise Muir Seamount is a seamount ( underwater volcano ), located at 33°43.20′N 62°29.40′W / 33.72000°N 62.49000°W / 33.72000; -62.49000 It is located in the Bermuda rise , a seismically active region, and was the site of an earthquake on 24 March 1978.
2022: Hunga Tonga-Hunga Ha'apai, Tonga. On Jan. 1, an underwater volcano near Tonga exploded, sending a plume of ash and steam more than 12 miles into the atmosphere in an event that was powerful ...
In August 2019, news media reported a large pumice raft floating in the South Pacific between Fiji and Tonga. [6] Subsequent scientific investigations revealed the pumice raft originated from the eruption of a nearby submarine volcano, which was directly observed as a volcanic plume in satellite images. [ 7 ]