August 20, 1930 Eruption of Asamayama

Date

August 20, 1930

Volcano

Asamayama, complex volcano

Country

Japan

Volcanic Explosivity Index

3, moderate to large (eruption column 3 to 15 km)

Killed by

Tephra (ash, bombs, lapilli, steam blasts)

Location

36.406° N, 138.523° E

Deaths

6

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.

• August 18, 1961VEI 2 · 1 death
• September 23, 1950VEI 2 · 1 death
• August 14, 1947VEI 2 · 11 deaths
• July 13, 1941VEI 2 · 1 death
• July 16, 1938VEI 1 · Deaths: few
• July 29, 1936VEI 3 · 2 deaths
• August 20, 1931VEI 3 · 3 deaths
• May 29, 1913VEI 1 · 1 death
• August 15, 1911VEI 2 · 2 deaths
• May 8, 1911VEI 2 · 1 death · 60 houses destroyed
• January 22, 1900VEI 2 · 25 deaths
• November 7, 1803VEI 2 · Deaths: few
• July 4, 1803VEI 2 · Deaths: few
• August 5, 1783VEI 4 · 1,491 deaths
• June 22, 1721VEI 1 · 15 deaths
• May 13, 1598VEI 2 · 800 deaths
• May 1, 1596VEI 2 · Deaths: many

Every eruption in 1930The 1900sAsamayamaEarthquakes near AsamayamaThis day in weather history

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 4483.