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Kikai Caldera

July 29, 2026

A vast reservoir of magma beneath Japan's Kikai caldera appears to be filling again, offering scientists a rare glimpse into how some of Earth's largest volcanoes recover after catastrophic eruptions.

About Kikai Caldera:

  • It is a massive submarine caldera with three small islands, parts of the caldera rim, that project above sea level.
  • It is located in the East China Sea just south of Kyushu, Japan.
  • It is still active, producing a scattered array of minor eruptions in recent decades.
  • Research has found evidence of new volcanic activity beneath the Kikai Caldera, pointing to the formation of a lava dome and raising concerns about its potential to erupt again.

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