This undersea earthquake generated recorded tsunami waves across coastal and trans-oceanic sectors. Preserved in seismic archive for scientific reference — no active hazard exists.
A magnitude 7.6 (MW) earthquake occurred on 2025-12-08, 23:15 local time (14:15 UTC) (318d ago), centered Off the coast of Hachinohe (77 km NE, Japan). The hypocenter was located at a intermediate depth of 40.7 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.
Curated Global Seismic Archive (1700–Present)
3.79 Mt TNT
intermediate (35–70 km (Intermediate))
Injuries: > 5,000 · ~17.7M 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 |
|---|---|---|
| Hachinohe · Aomori | 77 km | MMI VIII |
| Aomori · Aomori | 125 km | MMI VII |
| Hakodate · Hokkaido | 150 km | MMI VII |
| Hirosaki · Aomori | 152 km | MMI VII |
| Morioka · Iwate | 168 km | MMI VII |
| Muroran · Hokkaido | 181 km | MMI VI |
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 | us6000rtdt | M 7.6 | 40.7 km | 41.00, 142.18 |
Nearest mapped active fault: Noheji, 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.