The Mystery of Miyakejima Volcano's Caldera Collapse; The Eruption was Seemingly Too Small

Within Japan is the volcanic island of Miyakejima which for a period of a decade required everyone who visited or lived on the island to carry a gas mask at all times. Yet, the cause of this predicament was an unusual caldera collapse that occurred during a 2000 volcanic eruption. This eruption was seemingly too small to have generated the caldera, meaning that its origin had another source.

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Sources/Citations:
[1] Japanese Meteorological Agency
[2] VEIs, dates/years, composition, tephra layer name, DRE estimates, and bulk tephra volume estimates for volcanic eruptions shown in this video which were assigned a VEI 4 or larger without an asterisk after their name are sourced from the LaMEVE database (British Geological Survey © UKRI), https://www2.bgs.ac.uk/vogripa/view/controller.cfc?method=lameve, Used with Permission

0:00 Volcanic Calderas
0:34 Miyakejima
2:20 2000 Eruption Sequence
1:40 Location
1:57 Geologic Setting
4:06 Conclusion

Видео The Mystery of Miyakejima Volcano's Caldera Collapse; The Eruption was Seemingly Too Small канала GeologyHub