October 1826 Eruption of Asosan

Name: October 1826 Eruption of Asosan
Start: 1826-10
Location: Asosan, Japan

October 1826 · VEI 2 · Deaths: many

Asosan in Japan erupted in October 1826 with a Volcanic Explosivity Index of 2.

Where it erupted

Asosan, Japan, with its other significant eruptions.

Open the live map with volcanic ash advisories

The eruption

Date: October 1826
Volcano: Asosan, caldera
Country: Japan
Volcanic Explosivity Index: 2, moderate (eruption column 1 to 5 km)
Killed by: Tephra (ash, bombs, lapilli, steam blasts)
Location: 32.885° N, 131.085° E

The toll

Deaths: Many (about 101 to 1,000)

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.

Sapper states that many people who had come to pray 2,200 m S of the crater lake died from ash suffocation. Fatalities are not mentioned in Japanese compilations.

Other significant eruptions of Asosan

Every eruption in 1826 The 1800s Asosan Earthquakes 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 990.