A magnitude 8.3 (MW) earthquake occurred on 1994-10-04, 23:22 local time (13:22 UTC) (11706d ago), centered North Pacific Ocean (254 km E, Japan). The hypocenter was located at a shallow depth of 14 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.
Curated Global Seismic Archive (1700–Present)
42.50 Mt TNT
shallow (Shallow crustal)
Injuries: > 5,000 · ~12.1M 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 | 254 km | MMI VII |
| Kitami · Hokkaido | 275 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 | usp0006kdp | M 8.3 | 14 km | 43.77, 147.32 |
Nearest mapped active fault: Unnamed Fault, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).