764 Eruption of Aira
Aira in Japan erupted in 764 with a Volcanic Explosivity Index of 4. The eruption killed 80 people.
Where it erupted
Aira, Japan, with its other significant eruptions.
The eruption
The toll
- Deaths
- 80
Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.
What the record says
NCEI’s account, from the sources it cites.
Deaths possibly by phreatomagmatic eruption or lava flow.
Other significant eruptions of Aira
More
Sources
Volcanoes and significant eruptions from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. Volcano numbers are the Smithsonian Institution’s Global Volcanism Program’s. NCEI event 843.