Kikai supervolcano in Japan is refilling with fresh magma

Scientists have discovered that fresh magma is accumulating beneath Japan's Kikai caldera, a massive volcanic system that produced one of the largest eruptions of the Holocene approximately 7,300 years ago. Research from Kobe University indicates the underground reservoir is slowly refilling, providing rare insight into how supervolcanoes rebuild their magma supplies following catastrophic events.

Historical studies regarding the Kikai-Akahoya eruption suggest the event caused significant environmental damage, including earthquakes, tsunamis, and heavy ashfall. While the eruption devastated ecosystems, archaeological research led by Lund University shows that human impact was uneven. While some populations declined, certain Jomon communities in northern Kyushu continued to grow, potentially aided by refugees moving from the most heavily impacted areas.

Understanding the accumulation of magma in systems like Kikai may help scientists better recognize warning signs for other major supervolcanoes, such as Yellowstone in the United States or Toba in Indonesia.