| Date & time | Sep 20, 2022 18:24:13 UTC - |
| Local time at epicenter | Wednesday, Sep 21, 2022 at 3:24 am (GMT +9) |
| Status | Confirmed |
| Magnitude | 3.8 |
| Depth | 131.6 km |
| Epicenter latitude / longitude | 42.213°N / 141.186°E  (North Pacific Ocean, Japan) |
| Antipode | 42.213°S / 38.814°W |
| Shaking intensity | Very weak shaking |
| Felt | 0 reports |
| Primary data source | NIED (National Research Institute for Earth Science and Disaster Resilience) |
| Nearest volcano | Kuttara (31 km / 19 mi) |
| Nearby towns and cities | 20 km (12 mi) SE of Muroran (pop: 96,200) | Show on map | Quakes nearby 39 km (24 mi) SE of Date (pop: 35,300) | Show on map | Quakes nearby 40 km (25 mi) SSW of Shiraoi (pop: 20,800) | Show on map | Quakes nearby 58 km (36 mi) SW of Tomakomai (pop: 174,800) | Show on map | Quakes nearby 61 km (38 mi) NE of Hakodate (pop: 275,700) | Show on map | Quakes nearby 78 km (48 mi) SSW of Chitose (pop: 92,900) | Show on map | Quakes nearby 96 km (60 mi) S of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby 737 km (458 mi) N of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby 142 km (88 mi) E of Okushiri Island (pop: 3,340) | Show on map | Quakes nearby 197 km (122 mi) SW of Hokkaido Island (pop: 5,500,000) | Show on map | Quakes nearby |
| Weather at epicenter at time of quake | Overcast Clouds  14.8°C (59 F), humidity: 53%, wind: 4 m/s (7 kts) from NNW |
| Estimated seismic energy released | 3.2 x 1010 joules (8.78 megawatt hours, equivalent to 7.56 tons of TNT) | about seismic energy |
| Mag. | Depth | Location | Source |
| 3.8 | 132 km | Japan: S OFF TOMAKOMAI | NIED |
