Observed earthquake
244 km ESE of Attu Station, Alaska
Recent observationReported by 2 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 |
|---|---|---|---|---|---|---|
| EMSCEuropean-Mediterranean Seismological Centre | M4.0 ml | 17 km | 2026-10-08 07:49:10 UTC | 51.74°N, 176.32°E | Not stated | 20261008_0000335 ↗ |
| USGSUnited States Geological Survey | M4.0 mb | 32 km | 2026-10-08 07:49:12 UTC | 51.76°N, 176.29°E | Reviewed by an analyst26 stations | us6000u130 ↗ |
| USGSUnited States Geological Survey | M4.0 ml | 17 km | 2026-10-08 07:49:10 UTC | 51.74°N, 176.32°E | Reviewed by an analyst20 stations | aka2026txtsge ↗ |
Source: Earthquake data from the European-Mediterranean Seismological Centre (EMSC) via SeismicPortal. · Retrieved: 2026-10-09 01:09:14 UTC
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-10 05:34:19 UTC · grouped with match confidence 97%
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-09 01:09:13 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.