 JMA seismic intensity map and epicenter | |
| UTC time | 1940-08-01 15:08:24 |
|---|---|
| ISC event | 901515 |
| USGS-ANSS | ComCat |
| Local date | August 2, 1940 |
| Local time | 00:08:22 JST |
| Magnitude | 7.5 Mw |
| Depth | 15 km (9.3 mi) |
| Epicenter | 44°33′40″N 139°40′41″E / 44.561°N 139.678°E |
| Type | Thrust |
| Max. intensity | JMA 4 |
| Tsunami | Yes |
| Casualties | 10 dead, 24 injured |
The 1940 Shakotan earthquake occurred on August 2 at 00:08:22 JST with a moment magnitude (Mw ) of 7.5 and maximum JMA seismic intensity of Shindo 4. The shock had an epicenter off the coast of Hokkaido, Japan. Damage from the shock was comparatively light, but the accomanying tsunami was destructive. The tsunami caused 10 deaths and 24 injuries on Hokkaido, and destroyed homes and boats across the Sea of Japan. The highest tsunami waves (5 m (16 ft)) were recorded at the coast of Russia while along the coast of Hokkaido, waves were about 2 m (6 ft 7 in).