Posted on Nov 7, 2023
New island created by explosive underwater volcano eruption
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A new island has formed following an explosive underwater volcano eruption in Japan.
The freshly formed isle lies off the coast of Iwo Jima, south of Tokyo. When underwater volcanoes, also known as seamounts, erupt, the build of lava occasionally breaks the surface of the water. This causes an island to form.
The eruption occurred on October 30, following an elevated period of unrest. Magma had been accumulating for quite some time, and finally breached the surface, creating a new island. Prior to this island being formed, Iwo Jima had emitted volcanic tremors every two minutes since the middle of October, according to the Japan Meteorological Agency (JMA).
Setsuya Nakada, a professor of volcanology at the University of Tokyo, told Newsweek that the eruption offshore of Iwo Jima, also known as Iwoto, started last year. It then resumed on October 21.
The freshly formed isle lies off the coast of Iwo Jima, south of Tokyo. When underwater volcanoes, also known as seamounts, erupt, the build of lava occasionally breaks the surface of the water. This causes an island to form.
The eruption occurred on October 30, following an elevated period of unrest. Magma had been accumulating for quite some time, and finally breached the surface, creating a new island. Prior to this island being formed, Iwo Jima had emitted volcanic tremors every two minutes since the middle of October, according to the Japan Meteorological Agency (JMA).
Setsuya Nakada, a professor of volcanology at the University of Tokyo, told Newsweek that the eruption offshore of Iwo Jima, also known as Iwoto, started last year. It then resumed on October 21.
New island created by explosive underwater volcano eruption
Posted from newsweek.com
Geology
Japan
Posted 6 mo ago
Responses: 2
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PO1 William "Chip" Nagel rumor has it China has laid claim to it... :-)
..."The eruption occurred on October 30, following an elevated period of unrest. Magma had been accumulating for quite some time, and finally breached the surface, creating a new island. Prior to this island being formed, Iwo Jima had emitted volcanic tremors every two minutes since the middle of October, according to the Japan Meteorological Agency (JMA).
Setsuya Nakada, a professor of volcanology at the University of Tokyo, told Newsweek that the eruption offshore of Iwo Jima, also known as Iwoto, started last year. It then resumed on October 21.
"The depth of sea bottom when the eruption started last year was as shallow as 50 meters [164 feet]," Nakada said. "About 10 days after the resumption of its phreatomagmatic eruption the accumulation of erupted materials—rock, pumice, sand—accumulated on the sea bottom and the top reached the sea surface. By continuation of such the phreatomagmatic eruption, the islet increased its size."...
..."The eruption occurred on October 30, following an elevated period of unrest. Magma had been accumulating for quite some time, and finally breached the surface, creating a new island. Prior to this island being formed, Iwo Jima had emitted volcanic tremors every two minutes since the middle of October, according to the Japan Meteorological Agency (JMA).
Setsuya Nakada, a professor of volcanology at the University of Tokyo, told Newsweek that the eruption offshore of Iwo Jima, also known as Iwoto, started last year. It then resumed on October 21.
"The depth of sea bottom when the eruption started last year was as shallow as 50 meters [164 feet]," Nakada said. "About 10 days after the resumption of its phreatomagmatic eruption the accumulation of erupted materials—rock, pumice, sand—accumulated on the sea bottom and the top reached the sea surface. By continuation of such the phreatomagmatic eruption, the islet increased its size."...
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Very cool to see these breach the surface. Kind of sucks being in a submarine, tooling along and you get a sudden stop when you find something that wasn't charted though.
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