April 15, 1664 Eruption of Unzendake

Name: April 15, 1664 Eruption of Unzendake
Start: 1664-04-15
Location: Unzendake, Japan

April 15, 1664 · VEI 2 · 30 deaths

Unzendake in Japan erupted on April 15, 1664 with a Volcanic Explosivity Index of 2. The eruption killed 30 people.

Where it erupted

Unzendake, Japan, with its other significant eruptions.

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The eruption

Date: April 15, 1664
Volcano: Unzendake, complex volcano
Country: Japan
Volcanic Explosivity Index: 2, moderate (eruption column 1 to 5 km)
Killed by: Secondary (post-eruption) mudflows
Location: 32.761° N, 130.299° E

The toll

Deaths: 30

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.

In the spring of 1664 water poured out of Tsukumo-jima pond at the summit of Fugen-dake, producing floods that killed > 30 in the Mizunashi river valley.

Other significant eruptions of Unzendake

Every eruption in 1664 The 1600s Unzendake Earthquakes near Unzendake 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 4476.