Moderate mag. 5.0 earthquake - 91 km northwest of Noshiro, Akita, Japan, on Friday, September 23, 1983 at 11:36 GMT
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Moderate magnitude 5.0 earthquake at 25 km depth
1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Earthquake details
| Date & time | Sep 23, 1983 11:36:59 UTC |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 5 |
| Depth | 24.9 km |
| Epicenter latitude / longitude | 40.742°N / 139.213°E  (Japan Sea, Japan) |
| Antipode | 40.742°S / 40.787°W |
| Shaking intensity | Light shaking near epicenter |
| Felt | 0 reports |
| Primary data source | USGS (United States Geological Survey) |
| Nearest volcano | Oshima-Ko-jima (85 km / 53 mi) |
| Nearby towns and cities | 91 km (57 mi) NW of Noshiro (pop: 51,100) | Show on map | Quakes nearby 98 km (61 mi) W of Shimokizukuri (Tsugaru) (pop: 18,900) | Show on map | Quakes nearby 104 km (64 mi) W of Goshogawara (pop: 49,100) | Show on map | Quakes nearby 108 km (67 mi) W of Hirosaki (pop: 175,000) | Show on map | Quakes nearby 125 km (78 mi) WNW of Ōdate (pop: 64,500) | Show on map | Quakes nearby 128 km (80 mi) W of Aomori (pop: 298,400) | Show on map | Quakes nearby 137 km (85 mi) NW of Akita (pop: 320,100) | Show on map | Quakes nearby 201 km (125 mi) NW of Morioka (pop: 295,200) | Show on map | Quakes nearby 313 km (195 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 | 2 x 1012 joules (554 megawatt hours, equivalent to 477 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 |
| 5.0 | 25 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
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Recorded aftershocks, latest first (0 quake)
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