A magnitude 8.2 (MW) earthquake occurred on 2003-09-25, 05:50 local time (19:50 UTC) (8427d ago), centered Off the coast of Kushiro (135 km S, Japan). The hypocenter was located at a shallow depth of 27 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.
Curated Global Seismic Archive (1700–Present)
30.09 Mt TNT
shallow (Shallow crustal)
Injuries: > 5,000 · ~22.4M felt
Timeline of foreshocks, main rupture, aftershocks and machine learning risk probability evolution.
Shaking intensity is modelled from magnitude, depth and distance (GMPE attenuation), not reported by residents.
| Town | Distance | Intensity |
|---|---|---|
| Kushiro · Hokkaido | 135 km | MMI VIII |
| Obihiro · Hokkaido | 138 km | MMI VIII |
| Tomakomai · Hokkaido | 215 km | MMI VII |
| Kitami · Hokkaido | 226 km | MMI VII |
| Hachinohe · Aomori | 246 km | MMI VII |
| Muroran · Hokkaido | 249 km | MMI VII |
Independent solutions for the same rupture. Differences of 0.1–0.3 in magnitude are normal and reflect method and station coverage.
| Agency | Source ID | Magnitude | Depth | Epicenter |
|---|---|---|---|---|
USGS Primary | official20030925195006360_27 | M 8.2 | 27 km | 41.81, 143.91 |
Nearest mapped active fault: Kochien, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).
View live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for this zone.