Japan's Ogasawara Island
- A new island emerged near Japan's Ogasawara Island chain after an undersea volcano erupted in late October 2023.
- The unnamed island, about 100 meters in diameter, resulted from phreatomagmatic eruptions, where magma interacting with seawater produces explosive bursts of steam and ash.
- Eruptions occurred 1 kilometer off Iwoto island (formerly Iwo Jima) and continued for about 10 days, accumulating volcanic material above the sea surface.
- The Ogasawara Island chain is a volcanic arc with over 30 islands; the most recent island formation occurred in 2013, merging with an existing one.
- Japan, on the Pacific "Ring of Fire," has 111 of the world's approximately 1,500 ....
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