August 18, 1927 Earthquake: Kashima, Japan
A magnitude 6.9 earthquake struck Kashima, Japan on August 18, 1927 at 19:28 UTC, 20 km below the surface. 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
- August 18, 1927
- Time
- 19:28 UTC
- Place
- Kashima, Japan
- Magnitude
- 6.9 (Ms)
- Focal depth
- 20 km (12 mi)
- Tsunami
- Yes: the tsunami it caused
- Epicenter
- 34.200° N, 142.000° 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:
August 19, 4:28 [local time], 1927, there was a moderate earthquake with source at sea off the Boso Peninsula. It was accompanied by aftershocks and a weak tsunami, which was registered by the tide gauges at Choshi and Mera.
Iida et al. (1967): 18.VIII; 19h28m; 34.2 N., 142 E., 20 km, M=6?, m=-2.
Other significant earthquakes nearby
Within 200 km, the deadliest first.
- November 4, 1677, Off SE. Boso Peninsula, Japan
- November 25, 1953, Kashima, Japan
- January 19, 2005, East Coast Honshu, Japan
- September 18, 1984, Honshu Island, Japan
- March 12, 1909, Choshi, Japan
- March 13, 1909, Yokohama, Japan
- June 1, 1923, Kashima, Japan
- February 29, 1972, Hachijojima, Tokyo, S of Honshu, Japan
- December 4, 1732, Kujukuri Beach, Japan
- December 4, 1972, S of Honshu, Hachijojima, Japan
- April 21, 1916, Off East Coast Honshu, Japan
- September 4, 1642, Boso, Japan
- February 8, 1602, Boso, Japan
- December 17, 1670, Boso, Japan
- September 2, 1923, Near S Coast Honshu, Japan
More
Significant earthquakes of 1927The 1900sEvery quake the USGS located in 1927Recent 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 6584.