October 21, 1867 Eruption of Zaozan [Zaosan]

Name: October 21, 1867 Eruption of Zaozan [Zaosan]
Start: 1867-10-21
Location: Zaozan [Zaosan], Japan

October 21, 1867 · VEI 2 · 3 deaths

Zaozan [Zaosan] in Japan erupted on October 21, 1867 with a Volcanic Explosivity Index of 2. The eruption killed 3 people.

Where it erupted

Zaozan [Zaosan], Japan.

Open the live map with volcanic ash advisories and webcams

The eruption

Date: October 21, 1867
Volcano: Zaozan [Zaosan], complex volcano
Country: Japan
Volcanic Explosivity Index: 2, moderate (eruption column 1 to 5 km)
Killed by: Mudflows and lahars
Location: 38.144° N, 140.440° E

The toll

Deaths: 3

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.

Overflow of muddy water from Okama crater lake killed 3 hot springs bathers at E foot of Goshiki-dake. (reference #9675)

Okama boiled. 3 people were killed by flooding. (reference #12936)

Every eruption in 1867 The 1800s Zaozan [Zaosan]Earthquakes near Zaozan [Zaosan]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 2026-10-01. Volcano numbers are the Smithsonian Institution’s Global Volcanism Program’s. NCEI event 1232.