Asosan

October 1957 Eruption of Asosan

October 1957 · VEI 2 · 12 deaths

Asosan in Japan erupted in October 1957 with a Volcanic Explosivity Index of 2. The eruption killed 12 people.

Where it erupted

Asosan, Japan, with its other significant eruptions.

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The eruption

Date
October 1957
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
12

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.

12 ropeway workers killed, 20 (JMA says 28) injured by nighttime explosion.

Other significant eruptions of Asosan

More

Every eruption in 1957The 1900sAsosanEarthquakes 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 1019.