Strong mag. 5.3 earthquake - 87 km northwest of Noshiro, Akita, Japan, on Friday, September 23, 1983 at 11:20 GMT
Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes here | Quakes in Japan | Akita | Aomori | Iwate | Hokkaido | Tokyo
Strong magnitude 5.3 earthquake at 23 km depth
1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Earthquake details
| Date & time | Sep 23, 1983 11:20:01 UTC |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 5.3 |
| Depth | 22.9 km |
| Epicenter latitude / longitude | 40.748°N / 139.284°E  (Japan Sea, Japan) |
| Antipode | 40.748°S / 40.716°W |
| Shaking intensity | Moderate shaking near epicenter |
| Felt | 0 reports |
| Primary data source | USGS (United States Geological Survey) |
| Nearest volcano | Oshima-Ko-jima (81 km / 50 mi) |
| Nearby towns and cities | 87 km (54 mi) NW of Noshiro (pop: 51,100) | Show on map | Quakes nearby 92 km (57 mi) W of Shimokizukuri (Tsugaru) (pop: 18,900) | Show on map | Quakes nearby 98 km (61 mi) W of Goshogawara (pop: 49,100) | Show on map | Quakes nearby 102 km (63 mi) W of Hirosaki (pop: 175,000) | Show on map | Quakes nearby 120 km (75 mi) WNW of Ōdate (pop: 64,500) | Show on map | Quakes nearby 122 km (76 mi) W of Aomori (pop: 298,400) | Show on map | Quakes nearby 135 km (84 mi) NNW of Akita (pop: 320,100) | Show on map | Quakes nearby 197 km (122 mi) NW of Morioka (pop: 295,200) | Show on map | Quakes nearby 309 km (192 mi) SW of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby 564 km (350 mi) N of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby |
| Estimated seismic energy released | 5.6 x 1012 joules (1.56 gigawatt hours, equivalent to 1344 tons of TNT) | about seismic energy |
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Mag. | Depth | Location | Source |
| 5.3 | 23 km | near the west coast of Honshu, Japan | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Aftershocks
[More info]
Recorded aftershocks, latest first (1 quake)
Date and time | Mag Depth | Location | Details |
| Sep 23, 1983 11:36 39 years ago | 5.0 25 km | 91 km NW of Noshiro, Akita, Japan | More |
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!
