240 Eruption of Ksudach
Ksudach in Russia erupted in 240 with a Volcanic Explosivity Index of 6.
Where it erupted
Ksudach, Russia, with its other significant eruptions.
The eruption
The toll
The record gives no deaths, injuries or damage for this eruption.
What the record says
NCEI’s account, from the sources it cites.
An array of post-caldera structures at Ksudach is truncated by later calderas, the last three of which formed during the Holocene, about 7900 and 5000 BC and about 240 AD. The latter eruption was the second largest in Kamchatka during the Holocene, and produced about 20 cu km of rhyodacitic airfall tephra and 3-4 cu km of pyroclastic flows.
More
Every eruption in 240The 200sKsudachEarthquakes near Ksudach
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 5211.