Asamayama

June 22, 1721 Eruption of Asamayama

June 22, 1721 · VEI 1 · 15 deaths

Asamayama in Japan erupted on June 22, 1721 with a Volcanic Explosivity Index of 1. The eruption killed 15 people.

Where it erupted

Asamayama, Japan, with its other significant eruptions.

Open the live map with volcanic ash advisories

The eruption

Date
June 22, 1721
Volcano
Asamayama, complex volcano
Country
Japan
Volcanic Explosivity Index
1, small (eruption column 100 m to 1 km)
Killed by
Tephra (ash, bombs, lapilli, steam blasts)
Location
36.406° N, 138.523° E

The toll

Deaths
15

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.

15 climbers killed, some sources say 5. (reference #9675)

June 22: 15 mountain-climbers were killed, and 1 was seriously injured. (reference #12936)

Other significant eruptions of Asamayama

More

Every eruption in 1721The 1700sAsamayamaEarthquakes near AsamayamaThis day in weather history

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 1133.