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 8.2 (MW) earthquake occurred on 2021-07-29, 19:15 local time (06:15 UTC) (1911d ago), centered Off the coast of Perryville (100 km SE, USA). The hypocenter was located at a intermediate depth of 35 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.
Curated Global Seismic Archive (1700–Present)
30.09 Mt TNT
intermediate (35–70 km (Intermediate))
Injuries: > 5,000 · ~1.7M felt
Timeline of foreshocks, main rupture, aftershocks and machine learning risk probability evolution.
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 | ak0219neiszm | M 8.2 | 35 km | 55.36, -157.89 |
Nearest mapped active fault: Unnamed Fault, 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.