Aira

764 Eruption of Aira

764 · VEI 4 · 80 deaths

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.

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The eruption

Date
764
Volcano
Aira, stratovolcano
Country
Japan
Volcanic Explosivity Index
4, large (eruption column 10 to 25 km)
Killed by
Tephra (ash, bombs, lapilli, steam blasts); Lava flows
Location
31.577° N, 130.659° E

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

Every eruption in 764The 700sAiraEarthquakes near Aira

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.