September 16, 1947 Eruption of Akagisan

Name: September 16, 1947 Eruption of Akagisan
Start: 1947-09-16
Location: Akagisan, Japan

September 16, 1947 · 699 deaths

Akagisan in Japan erupted on September 16, 1947. The eruption killed 699 people.

Where it erupted

Akagisan, Japan.

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The eruption

Date: September 16, 1947
Volcano: Akagisan, stratovolcano
Country: Japan
Killed by: Secondary (post-eruption) mudflows
Location: 36.560° N, 139.193° E

The toll

Deaths: 699

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.

A non-eruptive lahar due to a typhoon caused 699 fatalities, mostly on the Aratogawa river, originating from the summit crater of Akagi. No eruption. (reference #9675)

Every eruption in 1947 The 1900s Akagisan Earthquakes near Akagisan This 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 6508.