2023-11-11 07:00:12
An impressive natural phenomenon of the creation of an island by underwater volcanic eruption has been observed. On October 30, such an eruption gave birth to a new island in the Pacific, following the massive expulsion of rocks that accumulated off the coast of the island of Iwo Jima (Iōjima or Iōtō (硫黄島, Iōjima or Iōtō?…), belonging to Japan.
Setsuya Nakada / Asahi Shimbun
A Japanese press device spotted the first signs of an eruption in the southern part of the Izu-Ogasawara arc, regarding 1,200 kilometers south of Tokyo. The explosions, occurring every few minutes (First form of a document: Right: one minute is the original of an act. …), projected large blocks of rock more than 50 meters into the air following the meeting between incandescent lava and water beneath the surface of the ocean. body of water…). The eruption breached the ocean surface in at least two places, said researchers at the University of Tokyo. Rock piles formed north of the eruption site, creating a round, rugged island approximately 100 meters in diameter (In a circle or sphere, the diameter is a line segment passing through the center… ). The surrounding waters were discolored and dotted with pumice, an extremely porous rock formed during explosive volcanic eruptions.
The researchers observed that floating pumice and discolored water extended around the periphery of the island, suggesting that magma is erupting at this location. They also noted a concentric pattern formed by the rocks on the island, but no crater (For crater of volcanic origin, see Volcanic crater For crater of origin…) was visible on the surface.
Setsuya Nakada / Asahi Shimbun
Underwater eruptions, called phreatic eruptions, characterized by explosions of steam and volcanic material on the surface, have been recorded in this region in recent years. These events are triggered when water comes into contact with burning magma, lava, rocks or other heated deposits.
Underwater, volcanic material erupting from the seafloor instantly solidifies. Regular eruptions have caused Iwo Jima to rise by more than a meter each year, making it one of fastest growing caldera volcanoes in the world (The word world can refer to:).
The recent eruption was preceded by volcanic tremors beginning on October 21 and occurring every two minutes until October 30. The eruption is still ongoing and constantly adding volcanic rock to the new island might protect it from rapid erosion. How long the current eruption will last is uncertain, but the new island might eventually merge with Iwo Jima, Nakada said.
Following a volcanic eruption in 2021, the seabed rose to the point of resurfacing around twenty “ghost ships” that had sunk during the Battle of Iwo Jima in 1945.
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