Space radar image of Aira Caldera, with Sakurajima in the bay formed by the caldera.
|Last eruption||c. 22,000 years ago|
Aira Caldera (姶良カルデラ Aira-Karudera?) is a gigantic volcanic caldera in the south of the island of Kyūshū, Japan. The caldera was created by a massive eruption, approximately 22,000 years ago. Eruption of voluminous pyroclastic flows accompanied the formation of the 17 × 23 km-wide Aira caldera. Together with a large pumice fall, these amounted to approximately 400 km3 of tephra (VEI 7).
The major city of Kagoshima and the 16,000-year-old Sakurajima volcano lie within the caldera. Sakura-jima, one of Japan's most active volcanoes, is a post-caldera cone of the Aira caldera at the northern half of Kagoshima Bay.
- Aramaki, Shigeo (1984). "Formation of the Aira Caldera, Southern Kyushu, ∼22,000 Years Ago". Journal of Geophysical Research 89 (B10): 8485–8501. Bibcode:1984JGR....89.8485A. doi:10.1029/JB089iB10p08485.
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