Asosan

December 1331 Eruption of Asosan

December 1331 · VEI 2 · Deaths: few

Asosan in Japan erupted in December 1331 with a Volcanic Explosivity Index of 2.

Where it erupted

Asosan, Japan, with its other significant eruptions.

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The eruption

Date
December 1331
Volcano
Asosan, caldera
Country
Japan
Volcanic Explosivity Index
2, moderate (eruption column 1 to 5 km)
Location
32.885° N, 131.085° E

The toll

Deaths
Few (about 1 to 50)

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.

Milne says all the people of Hojo were destroyed in 19-month eruption, but other compilers list no fatalities.

Other significant eruptions of Asosan

More

Every eruption in 1331The 1300sAsosanEarthquakes near Asosan

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 949.