This event was automatically detected and need to be confirmed by one of our analysts.
Type Event
Magnitude 5.4 mb
Local datetime 2025/08/22 07:34
Universal datetime 2025/08/21 22:34
Latitude 38.84 ° ± 4 km
Longitude 141.92 ° ± 5 km
Depth 10 km (from location) ± 0.0 km

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See the seismogram of this event.

Near cities

This table shows only the most populated cities around the epicenter.
Name Distance (km) Population
Sendai  99 1.037562e+06
Niigata  272 505272
Iwaki  218 357309
Kōriyama  208 340560
Akita  185 320069
Aomori  244 298394
Morioka  119 295172
Fukushima  176 294237
Yamagata  153 254538
Mito  302 246538
Hachinohe  189 239046
Nagaoka  309 195318
Hirosaki  229 174972
Sakata  180 100446
Tsuruoka  182 99820

Past seismicity

  This map shows the most significant earthquake around this event.

Event details

Parameters

Evaluation status
RMS 1.23
Azimuthal gap 131.61 °
Number of stations used 33
Number of phases used 33

Webservices

The data of this event are available in various formats (QuakeML, GeoJSON and text) through the following links :

QuakeML GeoJSON Text

Phases

Network Station Phase Time Residual (s) Azimuth (°) Distance (°) Mode
IU MAJO P 22:35:42.19 2.29 233.23 3.73 Automatic
IU YSS P 22:36:42.30 1.91 4.04 8.14 Automatic
IU MA2 P 22:39:30.57 -0.47 12.28 21.48 Automatic
IU TATO P 22:39:38.47 0.72 237.2 22.11 Automatic
IU YAK P 22:39:59.47 -1.05 346.06 24.37 Automatic
IU ULN P 22:40:22.37 0.74 301.22 26.65 Automatic
IU BILL P 22:41:08.99 -1.41 16.93 32.18 Automatic
IU TIXI P 22:41:20.77 -0.85 352.58 33.46 Automatic
IU CHTO P 22:42:34.12 -0.71 254.16 42.13 Automatic
IU MAKZ P 22:42:47.49 0.12 300.78 43.6 Automatic
II KURK P 22:42:58.9 -0.61 306.89 45.01 Automatic
II KDAK P 22:43:02.7 0.75 42.99 45.35 Automatic
IU COLA P 22:43:17.42 1.73 33.01 47.18 Automatic
II KAPI P 22:43:24.59 1.54 210.17 48.41 Automatic
II AAK P 22:43:36.62 0.11 297.3 49.85 Automatic
II ALE P 22:44:37.57 1.13 3.62 58.05 Automatic
IU KBS P 22:44:41.82 0.68 350.07 58.72 Automatic
II WRAB P 22:44:38.12 -3.13 188.28 59.2 Automatic
IU MBWA P 22:45:10.42 -0.16 203.18 63.5 Automatic
II OBN P 22:45:33.44 -0.87 323.08 66.64 Automatic
II KIV P 22:45:54.37 0.21 310.79 69.8 Automatic
IU GNI P 22:46:00.47 0.6 306.55 70.74 Automatic
II UOSS P 22:46:03.99 -0.29 287.56 71.51 Automatic
IU KIEV P 22:46:11.12 -1.53 322.3 72.85 Automatic
II PFO P 22:46:40.12 0.75 56.67 77.5 Automatic
IU RSSD P 22:46:41.37 -0.62 42.1 77.95 Automatic
IU ANTO P 22:46:42.24 -0.59 312.18 78.11 Automatic
II RAYN P 22:46:52.67 -1.27 292.38 80.19 Automatic
II ESK P 22:47:01.37 1.36 340.78 81.25 Automatic
IU TUC P 22:47:04.27 0.59 54.58 81.98 Automatic
IU ANMO P 22:47:10.14 1.74 50.17 82.88 Automatic
II BFO P 22:47:11.2 -1.24 331.02 83.6 Automatic
IU CCM P 22:47:36.12 -2.14 39.08 88.92 Automatic