Observed earthquake
194 km SE of Attu Station, Alaska
Recent observationReported by 3 agencies. Every solution below is that agency's own measurement, stored unaltered.
Agency solutions
The same earthquake as measured independently by each agency. Values are never averaged or rewritten.
| Agency | Magnitude | Depth | Origin time | Epicentre | Review status | Source record |
|---|---|---|---|---|---|---|
| GEOFONGFZ Helmholtz Centre for Geosciences | M4.9 mb | 10 km | 2026-10-12 14:29:54 UTC | 51.38°N, 174.93°E | Not stated | gfz2026tzzo ↗ |
| USGSUnited States Geological Survey | M4.6 mb | 10 km | 2026-10-12 14:29:53 UTC | 51.43°N, 174.83°E | Reviewed by an analyst158 stations | us6000u1s8 ↗ |
| EMSCEuropean-Mediterranean Seismological Centre | M4.6 mb | 10 km | 2026-10-12 14:29:53 UTC | 51.41°N, 174.89°E | Not stated | 20261012_0000275 ↗ |
Source: Earthquake solutions from the GEOFON programme, GFZ Helmholtz Centre for Geosciences. · Retrieved: 2026-10-12 15:03:59 UTC · grouped with match confidence 94%
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-12 15:17:57 UTC
Source: Earthquake data from the European-Mediterranean Seismological Centre (EMSC) via SeismicPortal. · Retrieved: 2026-10-12 15:03:58 UTC
Why the agencies differ
Differences of a few tenths of a magnitude unit and tens of kilometres are normal and expected. Each agency uses a different set of seismic stations, a different velocity model for the Earth's interior, and sometimes a different magnitude scale altogether. None of them is “wrong”; they are independent measurements of the same event.
Prakruti groups solutions only when they agree closely in both time and location, and shows the preferred solution — favouring an analyst-reviewed moment magnitude where one exists — while keeping every other solution visible above.