October 7, 1731 Earthquake: Koori, Japan
A magnitude 6.6 earthquake struck Koori, Japan on October 7, 1731. It caused a tsunami.
Map
Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.
The earthquake
- Date
- October 7, 1731
- Place
- Koori, Japan
- Magnitude
- 6.6 (Ms)
- Tsunami
- Yes: the tsunami it caused
- Epicenter
- 37.900° N, 140.600° E
- Country
- Japan
The toll
The record gives no deaths, injuries or damage for this earthquake.
What the record says
NCEI’s account, from the sources it cites.
Reference #414:
1731, October 7. There was a strong earthquake at Koori (Fukushima Prefecture) which caused destruction of roads, bridges and homes. The epicenter of the shock was apparently on land; its hypothetical coordinates were 37o 52' N., 140o 30' E. Imamura, Musya and others report a tsunami on the coast of Fukushima Prefecture. The assertion is based on an account of the destruction at the mouth of the river, but this destruction might also have been caused by an earthquake. There was probably no tsunami. Iida et al. (1967): 7.X; 37.9o N., 140.6o E.; M=6.6
Reference #1055:
1731, October 7. Japan (Matsu).
Other significant earthquakes nearby
Within 200 km, the deadliest first.
- March 11, 2011, Honshu, Japan
- September 27, 1611, Aidu, Japan
- December 18, 1828, Sandyo IN Etigo, Japan
- July 10, 1804, Kisakata, Japan
- October 18, 1644, NW. Honshu Island, Japan
- March 15, 1914, Senhoku, Japan
- December 7, 1833, NW, Honshu, Japan
- October 23, 2004, Niigata Prefecture, Honshu, Japan
- July 6, 1905, Off Fukushima, Japan
- April 21, 1659, Aidu, Japan
- June 16, 1964, W Coast, Honshu, Japan
- June 12, 1978, Sanriku, Japan
- June 13, 2008, Tokyo, Honshu, Japan
- July 16, 2007, W Coast, Honshu, Japan
- April 11, 2011, Honshu, Japan
More
Significant earthquakes of 1731The 1700sRecent earthquakes near hereThis day in weather history
Sources
Significant earthquakes 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. NCEI earthquake 10028.