This event was automatically detected and need to be confirmed by one of our analysts.
| Type | Event |
| Magnitude | 5 mb |
| Local datetime | 2025/08/22 08:06 |
| Universal datetime | 2025/08/21 23:06 |
| Latitude | 39.31 ° ± 6 km |
| Longitude | 141.12 ° ± 12 km |
| Depth | 10 km (from location) ± 0.0 km |
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Testify !Near cities
This table shows only the most populated cities around the epicenter.
| Name | Distance (km) | Population |
|---|---|---|
Sendai 
|
114 | 1.037562e+06 |
| Niigata
|
238 | 505272 |
| Iwaki
|
252 | 357309 |
| Kōriyama
|
221 | 340560 |
| Akita
|
99 | 320069 |
| Aomori
|
171 | 298394 |
| Morioka
|
45 | 295172 |
| Fukushima
|
184 | 294237 |
| Hakodate
|
277 | 275730 |
| Yamagata
|
135 | 254538 |
| Hachinohe
|
138 | 239046 |
| Nagaoka
|
286 | 195318 |
| Hirosaki
|
150 | 174972 |
| Sakata
|
118 | 100446 |
| Tsuruoka
|
131 | 99820 |
Past seismicity
This map shows the most significant earthquake around this event.
Event details
Parameters
| Evaluation status | |
|---|---|
| RMS | 1.76 |
| Azimuthal gap | 173.76 ° |
| Number of stations used | 8 |
| Number of phases used | 8 |
Webservices
The data of this event are available in various formats (QuakeML, GeoJSON and text) through the following links :
Phases
| Network | Station | Phase | Time | Residual (s) | Azimuth (°) | Distance (°) | Mode |
|---|---|---|---|---|---|---|---|
| IU | MAJO | P | 23:07:13.59 | -0.83 | 220.58 | 3.6 | Automatic |
| IU | YSS | P | 23:08:12.70 | 1.49 | 8.37 | 7.74 | Automatic |
| IU | MA2 | P | 23:11:02.62 | -1.33 | 13.61 | 21.16 | Automatic |
| IU | MAKZ | P | 23:14:20.39 | 2.96 | 300.18 | 42.81 | Automatic |
| II | KURK | P | 23:14:28.47 | -0.33 | 306.37 | 44.22 | Automatic |
| II | WRAB | P | 23:16:21.72 | 1.42 | 187.37 | 59.58 | Automatic |
| II | KIV | P | 23:17:25.32 | -0.36 | 310.3 | 69.02 | Automatic |
| IU | KIEV | P | 23:17:41.47 | -3.02 | 321.86 | 72.09 | Automatic |